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# Selina solutions for Concise Chemistry Class 10 ICSE chapter 12 - Organic Chemistry [Latest edition]

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## Chapter 12: Organic Chemistry

Intext QuestionsExercise - 12AExercise - 12BExercise - 12CExercise - 12DExercise - 12EExercise - 12FMiscellaneous

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Intext Questions [Page 188]

Intext Questions | Q 1.1 | Page 188

What are organic compounds?

Intext Questions | Q 1.2 | Page 188

What is the Vital force theory? Why was it discarded?

Intext Questions | Q 2.1 | Page 188

Name a few sources of organic chemistry ?

Intext Questions | Q 2.2 | Page 188

Give the various applications of organic chemistry ?

Intext Questions | Q 3 | Page 188

Organic chemistry plays a key role in all walks of life. Discuss

Intext Questions | Q 4 | Page 188

Carbon shows some unique properties, name them ?

Intext Questions | Q 5.1 | Page 188

Explain the following : Tetravalency

Intext Questions | Q 5.2 | Page 188

Explain the following : Catenation

Intext Questions | Q 6 | Page 188

Write any four properties of organic compounds that distinguish them from inorganic compounds.

Intext Questions | Q 7 | Page 188

Why are organic compounds studies as a separate branch of chemistry?

Intext Questions | Q 8 | Page 188

What are Hydrocarbons? Compare saturated and unsaturated hydrocarbons?

Intext Questions | Q 9 | Page 188

Give reason for the existence of the large number of organic compounds.

Intext Questions | Q 10.1 | Page 188

Give at least one example in case to show structure of isomers of single bond compound ?

Intext Questions | Q 10.2 | Page 188

Give at least one example in case to show structure of isomers of double bond compound ?

Intext Questions | Q 10.3 | Page 188

Give at least one example in case to show structure of isomers of triple bond compound ?

Intext Questions | Q 11.1 | Page 188

Name a compound and draw the figure
Cyclic compound with a single bond?

Intext Questions | Q 11.2 | Page 188

Name a compound and draw the figure
Cyclic compound with the triple bond?

Intext Questions | Q 12.1 | Page 188

Give the name of one member of the saturated hydrocarbons ?

Intext Questions | Q 12.2 | Page 188

Give the name of one member of the unsaturated hydrocarbons ?

Intext Questions | Q 13 | Page 188

Define the substitution and addition reaction. Give an example for each.

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Intext Questions [Page 193]

Intext Questions | Q 1 | Page 193

Define a functional group and give the structural formula of the following functional group:

(a) Ketons

(b) Alcohols

(c) Aldehydes

Intext Questions | Q 2 | Page 193

Write the name and formula of the fourth member of the following homologous series:

1. Alkyne
2. Alcohol
Intext Questions | Q 3.1 | Page 193

Which part of an organic compound determines physical properties ?

Intext Questions | Q 3.2 | Page 193

Which part of an organic compound determines chemical properties ?

Intext Questions | Q 4 | Page 193

Name the alkyl radical and the functional group of the following organic compounds:

(a) CH3OH

(b) C2H5OH

(c) C3H7CHO

(d) C4H9COOH

(e) CH3COOH

(f) HCHO

Intext Questions | Q 5.1 | Page 193

What is an alkyl group?

Intext Questions | Q 5.2 | Page 193

Give the names of any three alkyl radicals. How are they formed?

Intext Questions | Q 6 | Page 193

Give the names and the structural formula of the first three members of the homologous series of alkanes.

Intext Questions | Q 7.1 | Page 193

What is a Homologous series?

Intext Questions | Q 7.2 | Page 193

What is the difference in the molecular formula of any two adjacent homologues:

(i) In terms of molecular mass

(ii) In terms of number and kind of atoms per molecule?

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Exercise - 12A [Pages 194 - 196]

Exercise - 12A | Q 1.01 | Page 194

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3}\\ |\\ \ce{CH3 -C -CH3}\\ |\\ \ce{CH3} \end{array}$

Exercise - 12A | Q 1.02 | Page 194

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3 -CH -CH2 -CH3}\\ |\phantom{.......}\\ \ce{CH3}\phantom{.......} \end{array}$

Exercise - 12A | Q 1.03 | Page 194

Write the IUPAC name of the following :

$\begin{array}{cc} \ce{H\phantom{...}H\phantom{...}H}\\ |\phantom{....}|\phantom{....}|\\ \ce{H - C = C - C -H}\\ \phantom{..........}|\\ \phantom{..........}\ce{H} \end{array}$

Exercise - 12A | Q 1.04 | Page 194

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3}\phantom{.........}\\ |\phantom{.........}\\ \ce{H3C - C - CH2CH2CH3}\\ |\phantom{.........}\\ \ce{CH3}\phantom{.........} \end{array}$

Exercise - 12A | Q 1.05 | Page 194

Write the IUPAC name of the following:

$\ce{CH3 - C ≡ C - CH2 CH3}$

Exercise - 12A | Q 1.06 | Page 194

Write the IUPAC name of the following:

$\begin{array}{cc} \phantom{............}\ce{CH3}\\ \phantom{..........}|\\ \ce{H - C = C - C - H}\\ \phantom{..........}|\\ \phantom{.............}\ce{CH3} \end{array}$

Exercise - 12A | Q 1.07 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{Cl}\phantom{.............}\\ |\phantom{.............}\\ \ce{CH3 - CH - CH - CH2 - CH3}\\ |\\ \ce{Cl} \end{array}$

Exercise - 12A | Q 1.08 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3\phantom{...}CH3\phantom{.......}}\\ \phantom{..}|\phantom{.......}|\phantom{........}\\ \ce{CH2 - CH - CH2}\\ \phantom{...........}|\\ \phantom{.......................}\ce{CH2 CH2 CH3} \end{array}$

Exercise - 12A | Q 1.09 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{H\phantom{..}H}\\ |\phantom{...}|\\ \ce{H3C - C=C - CH3}\\ \end{array}$

Exercise - 12A | Q 1.1 | Page 195

Write the IUPAC name of the following:

$\ce{CH3 - C ≡ C - CH2 CH2 CH2 CH3}$

Exercise - 12A | Q 1.11 | Page 194

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3}\phantom{.............}\\ |\phantom{...............}\\ \ce{CH3 - C - CH2 CH2 CH2 CHO}\\ |\phantom{...............}\\ \ce{CH3}\phantom{............} \end{array}$

Exercise - 12A | Q 1.12 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3 - CH - CH2 CH2 CH3}\\ |\phantom{............}\\ \ce{OH}\phantom{..........} \end{array}$

Exercise - 12A | Q 1.13 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3 CH CH2 CH2 COOH}\\ |\phantom{..............}\\ \ce{CH3}\phantom{...........} \end{array}$

Exercise - 12A | Q 1.14 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{CH3}\phantom{.....}\\ |\phantom{.....}\\ \ce{CH3 - C - CH2 CH3}\\ |\phantom{.....}\\ \ce{Br}\phantom{.....} \end{array}$

Exercise - 12A | Q 1.15 | Page 195

Write the IUPAC name of the following :

$\begin{array}{cc} \ce{CH3}\phantom{.........}\\ |\phantom{...........}\\ \ce{CH3 - CH - CH2 - CH2Br} \end{array}$

Exercise - 12A | Q 1.16 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{H}\phantom{.........}\\ |\phantom{.........}\\ \ce{H - C - C ≡ C - H}\\ |\phantom{.........}\\ \ce{H}\phantom{.........} \end{array}$

Exercise - 12A | Q 1.17 | Page 195

Write the IUPAC name of the following :

$\begin{array}{cc} \ce{H - C = O}\\ |\\ \ce{H} \end{array}$

Exercise - 12A | Q 1.18 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{H}\phantom{.........}\\ |\phantom{.........}\\ \ce{H - C - C ≡ C - H}\\ |\phantom{.........}\\ \ce{H}\phantom{.........} \end{array}$

Exercise - 12A | Q 1.19 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{H\phantom{...}H\phantom{...}H\phantom{..}}\\ \phantom{..}|\phantom{....}|\phantom{....}|\phantom{....}\\ \ce{H - C - C - C - OH}\\ \phantom{..}|\phantom{....}|\phantom{....}|\phantom{....}\\ \ce{H\phantom{...}H\phantom{...}H\phantom{..}}\\ \end{array}$

Exercise - 12A | Q 1.2 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{\phantom{.....}H\phantom{...}O}\\ \phantom{.....}|\phantom{....}||\\ \ce{H - C - C}\\ \phantom{.....}|\phantom{....}|\\ \ce{\phantom{.......}H\phantom{...}OH}\\ \end{array}$

Exercise - 12A | Q 1.21 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{H\phantom{...}O}\\ |\phantom{....}||\\ \ce{H - C - C - H}\\ |\phantom{.....}\\ \ce{H}\phantom{.....} \end{array}$

Exercise - 12A | Q 1.22 | Page 195

Write the IUPAC name of the following:

$\begin{array}{cc} \ce{H\phantom{...}H}\\ |\phantom{....}|\\ \ce{H - C - C - H}\\ |\phantom{....}|\\ \ce{Cl\phantom{...}Cl}\\\end{array}$

Exercise - 12A | Q 2.1 | Page 195

Write the structure of the following compound:

Prop-1-ene

Exercise - 12A | Q 2.2 | Page 195

The Structure of the Following Compound :

2,3-dimethylbutane

Exercise - 12A | Q 2.3 | Page 195

Write the structure of the following compound:

2 – methylpropane

Exercise - 12A | Q 2.4 | Page 195

Write the structure of the following compound:

3-hexene

Exercise - 12A | Q 2.5 | Page 195

Write the structure of the following compound:

prop– 1 – yne

Exercise - 12A | Q 2.6 | Page 195

Write the structure of the following compound:

2-methylprop – 1- ene

Exercise - 12A | Q 2.7 | Page 195

Write the structure of the following compound:

Alcohol with molecular formula C4H10O

Exercise - 12A | Q 3.1 | Page 195

C5H11 is an

• alkane

• alkene

• Alkyne

• Alkyl group

Exercise - 12A | Q 3.2 | Page 195

A hydrocarbon of the general CnH2n is

• C15H30

• C12H26

• C8H20

• C6H14

Exercise - 12A | Q 3.3 | Page 195

The total number of different carbon chains that four carbon atoms form in alkane is

• 5

• 4

• 3

• 2

Exercise - 12A | Q 3.4 | Page 195

CH3-CH2-OH and CH3-O-CH3 are

• Position isomers

• chain isomers

• homologous

• functional group isomers

Exercise - 12A | Q 3.5 | Page 195

The IUPAC name of the compound is

$\begin{array}{cc} \ce{CH3}\\ |\\ \ce{CH3 - CH2 - CH2 - CH - CH2 - CH3} \end{array}$

• 3-trimethylhexane

• 3- methyl hexane

• 4 – methyl hexane

Exercise - 12A | Q 4.01 | Page 195

Fill in the blank:

Propane and ethane are ____________

• Homologues

• isomers

Exercise - 12A | Q 4.02 | Page 195

Fill in the blank:

A saturated hydrocarbon does not participate in a/an _________ reaction.

• substitution

Exercise - 12A | Q 4.03 | Page 195

Fill in the blank:

Succeeding members of a homologous series differ by ______________

• CH

• CH2

• CH3

Exercise - 12A | Q 4.04 | Page 195

Fill in the blank:

As the molecular masses of hydrocarbons increase, their boiling points ________ and  melting point ____________

• increase

• decrease

Exercise - 12A | Q 4.05 | Page 195

Fill in the blank :

C25H52 and C50H102 belong to ______ homologous series.

• the same

• different

Exercise - 12A | Q 4.06 | Page 195

Fill in the blank:

CO is an__________ Compound.

• organic

• inorganic

Exercise - 12A | Q 4.07 | Page 196

Fill in the blanks:

The chemical properties of an organic compound are largely decided by the ___________ and the physical properties of an organic compound are largely decided by the ___________ . (functional group, number of carbon atoms)

Exercise - 12A | Q 4.08 | Page 196

Fill in the blank:

CHO is the functional group of an __________.

• alcohol

• aldehyde

Exercise - 12A | Q 4.09 | Page 196

Fill in the blank:

The root in the IUPAC name of an organic compound depends upon the number of carbon atoms in _____________

• any chain

• principal chain

Exercise - 12A | Q 4.1 | Page 196

Fill in the blank:

But-1-ene and but-2-ene are examples of ___________ isomerism.

• Chain

• position

• functional

Exercise - 12A | Q 5 | Page 196

Define or explain chain isomerism and position isomerism with examples in each case.

Exercise - 12A | Q 6.1 | Page 196

Define the term isomerism. State two main causes of isomerism.

Exercise - 12A | Q 6.2 | Page 196

Draw the chain isomers of hexane (C6H14) .

Exercise - 12A | Q 6.3 | Page 196

Draw position isomers of butane (C4H8) ?

Exercise - 12A | Q 7.1 | Page 196

Draw the structural formula for the following compounds:

isomer of n-butane

Exercise - 12A | Q 7.2 | Page 196

Draw the structural formula for the following compound: vinegar

Exercise - 12A | Q 7.3 | Page 196

Draw the structural formula for the following compound: 2-propanol

Exercise - 12A | Q 7.4 | Page 196

Draw the structural formula for the following compound: Ethanal

Exercise - 12A | Q 7.5 | Page 196

Draw the structural formula for the following compound: acetone

Exercise - 12A | Q 7.6 | Page 196

Draw the structural formula for the following compound: diethyl ether

Exercise - 12A | Q 8.1 | Page 196

What is the special feature of the structure of (i) ethane (ii) ethyne

Exercise - 12A | Q 8.2 | Page 196

what type of reaction is common to both the above compounds? Why methane does not undergo this type of reaction.

Exercise - 12A | Q 8.3 | Page 196

What is IUPAC name of dimethyl ether.

Exercise - 12A | Q 9.1 | Page 196

Which type of reaction will ethane undergo?

Exercise - 12A | Q 9.2 | Page 196

Which type of reaction will Ethene undergo?

Exercise - 12A | Q 10 | Page 196

Choosing only words from the following list, write down appropriate words to fill in the blanks from (a) to (e) given below. Addition, carbohydrates, CnH2n-2, CnH2n,CnH2n+2, electrochemical homologous, hydrocarbon, saturated, substitution, unsaturated.

The alkanes from an (a) ………… series with the general formula (b) ………….. The alkanes are (c) …………. (d) …………… which generally undergo (e) …………. reactions.

Exercise - 12A | Q 11.1 | Page 196

Draw the structural formula of a compound with two carbon atoms in the following case.
An alkane with carbon to carbon single bond

Exercise - 12A | Q 11.2 | Page 196

Draw the structural formula of a compound with two carbon atoms in the following case.
An alcohol containing two carbon atoms

Exercise - 12A | Q 11.3 | Page 196

Draw the structural formula of a compound with two carbon atoms in the following case.
An unsaturated hydrocarbon with carbon to carbon  triple bond

Exercise - 12A | Q 12.1 | Page 196

Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol From the above, name
The compound with -OH as the part of its structure.

Exercise - 12A | Q 12.2 | Page 196

Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol From the above, name
The compound with -COOH as part of its structure.

Exercise - 12A | Q 12.3 | Page 196

Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol From the above, name Homologue of the homologous series with the general formula CnH2n.

Exercise - 12A | Q 13.1 | Page 196

Give the correct IUPAC name and the functional group for the compounds whose structural formulae are given below:

$\begin{array}{cc} \ce{H\phantom{...}H\phantom{...}O}\\ \phantom{.}|\phantom{....}|\phantom{....}||\\ \ce{H - C - C - C - H}\\ \phantom{.}|\phantom{....}|\phantom{.....}\\ \ce{H\phantom{...}H\phantom{....}} \end{array}$

Exercise - 12A | Q 13.2 | Page 196

Give the correct IUPAC name and the functional group for the compounds whose structural formulae are given below:

$\begin{array}{cc} \ce{H\phantom{...}H\phantom{...}H\phantom{..}}\\ |\phantom{....}|\phantom{....}|\phantom{..}\\ \ce{H - C - C - C - OH}\\ |\phantom{....}|\phantom{....}|\phantom{..}\\ \ce{H\phantom{...}H\phantom{...}H\phantom{..}} \end{array}$

Exercise - 12A | Q 14 | Page 196

Copy and complete the following table which relates to three homologus series of hydrocarbons:

 General formula CnH2n CnH2n-2 CnH2n+2 IUPAC name of the homologus series Characteristic bond type Single bond IUPAC name of the first member of the series Type of reaction with chlorine Addition
Exercise - 12A | Q 15.1 | Page 196

Fill in the blanks with correct words from the brackets:

Alkenes are the (a) _______ (analogous/homologous) series of (b ) ______ (saturated /unsaturated) hydrocarbons. They differ from alkanes due to presence of (c) _______ (double/ single) bonds. Alkenes mainly undergo (d) ______ (addition/ substitution) reactions.

Exercise - 12A | Q 15.2 | Page 196

Fill in the blank with the correct word
The organic compound which undergoes substitution reaction is ___________

• C2H2

• C2H4

• C10H18

• C2H6

Exercise - 12A | Q 15.3 | Page 196

Draw the structural formulae of the two isomers of Butane. Give the correct IUPAC name of each of the isomer.

Exercise - 12A | Q 16.1 | Page 196

Name the saturated hydrocarbon containing two carbon atoms.

Exercise - 12A | Q 16.2 | Page 196

Name : An alcohol with three carbon atom.

Exercise - 12A | Q 16.3 | Page 196

Name : A triple bond hydrocarbon with two carbon atoms.

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Exercise - 12B [Page 202]

Exercise - 12B | Q 1 | Page 202

State the sources of Alkanes.

Exercise - 12B | Q 2 | Page 202

Methane is a greenhouse gas. comment.

Exercise - 12B | Q 3 | Page 202

Give the general formula of alkanes.

Exercise - 12B | Q 4.1 | Page 202

Draw the structures of isomers of : butane. Write the IUPAC and common names of these isomer.

Exercise - 12B | Q 4.2 | Page 202

Draw the structures of isomer of : pentane. Write the IUPAC and common names of these isomer

Exercise - 12B | Q 5 | Page 202

Write the

(a) Molecular formula

(b) Electron dot formula and

(c) The structural formula of methane and ethane

Exercise - 12B | Q 6.1 | Page 202

How is methane prepared in the laboratory ?

Exercise - 12B | Q 6.2 | Page 202

How is ethane prepared in the laboratory?

Exercise - 12B | Q 7 | Page 202

How are methane and ethane prepared from methyl iodide and ethyl bromide?

Exercise - 12B | Q 8 | Page 202

What is the substitution reaction? Give the reaction of chlorine with ethane and name the product formed?

Exercise - 12B | Q 9.1 | Page 202

Name the compounds formed when methane burns in : sufficient air, Give a balanced equation

Exercise - 12B | Q 9.2 | Page 202

Name the compounds formed when methane burns in:  insufficient air , Give a balanced equation

Exercise - 12B | Q 10.1 | Page 202

Write the names and formula of the products formed when Methane reacts with : (i) Chlorine (ii) bromine. Write the chemical equations.

Exercise - 12B | Q 10.2 | Page 202

Write the names and formula of the products formed when Methane reacts with : (i) Chlorine (ii) bromine. Write the chemical equations.

Exercise - 12B | Q 11.1 | Page 202

Name the compound prepared from: sodium propionate. Write the balanced equation for the same

Exercise - 12B | Q 11.2 | Page 202

Name the compound prepared from methyl iodide . Write the balanced equation for the same

Exercise - 12B | Q 11.3 | Page 202

Name the compound prepared from ethyl bromide write a balanced equation for the same.

Exercise - 12B | Q 12 | Page 202

Write the equation for the complete combustion of (i) methane (ii) ethane.

Exercise - 12B | Q 13.1 | Page 202

Convert:

Methane into chloroform

Exercise - 12B | Q 13.2 | Page 202

Convert:

sodium acetate into methane

Exercise - 12B | Q 13.3 | Page 202

Convert:

Methyl iodide into ethane

Exercise - 12B | Q 13.4 | Page 202

Convert: Methane to methyl alcohol

Exercise - 12B | Q 14.1 | Page 202

Give three uses of methane.

Exercise - 12B | Q 14.2 | Page 202

Give three uses of ethane.

Exercise - 12B | Q 15.1 | Page 202

Under what conditions does ethane gets converted to Ethyl alcohol

Exercise - 12B | Q 15.2 | Page 202

Under what conditions does ethane get converted to acetaldehyde .

Exercise - 12B | Q 15.3 | Page 202

Under what conditions does ethane gets converted to acetic acid

Exercise - 12B | Q 16 | Page 202

Using appropriate catalysts, ethane can be oxidized to an alcohol, an aldehyde and an acid. name the alcohol, aldehyde and acid formed when ethane is oxidized.

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Exercise - 12C [Pages 0 - 206]

Exercise - 12C | Q 1 | Page 206

Write (a) molecular formula, (b) electron dot formula and (c) structural formula of ethene (Ethylene).

Exercise - 12C | Q 2.1 | Page 206

The molecules of the alkene family are represented by a general formula CnH2n. Answer the following:  What do n and 2n signify?

Exercise - 12C | Q 2.2 | Page 206

The molecules of the alkene family are represented by a general formula CnH2n. Answer the following :

what is the name of alkene when n = 4?

Exercise - 12C | Q 2.3 | Page 206

The molecules of the alkene family are represented by a general formula CnH2n. Answer the following :

What is the molecular formula of alkene when n = 4?

Exercise - 12C | Q 2.4 | Page 206

The molecules of the alkene family are represented by a general formula CnH2n. Answer the following :

what is the molecular formula of the alkene if there are ten H atoms in it?

Exercise - 12C | Q 2.5 | Page 206

The molecules of the alkene family are represented by a general formula CnH2n. Answer the following :

what is the structural formula of the third member of the alkene family?

Exercise - 12C | Q 2.6 | Page 206

The molecules of alkene family are represented by a general formula CnH2n. Answer the following :

write the molecular formula of lower and higher homologous of an alkene which contains four carbon atoms.

Exercise - 12C | Q 3.1 | Page 206

Distinguish between the saturated hydrocarbon ethane and the unsaturated hydrocarbon ethene by drawing their structural formulae.

Exercise - 12C | Q 3.2 | Page 206

Draw the structure of isomers of butane and write their IUPAC names.

Exercise - 12C | Q 4 | Page 206

Give a balanced equation for the lab. Preparation of ethylene. How is the gas collected?

Exercise - 12C | Q 5.1 | Page 206

How is ethene prepared by dehydrohalogenation reaction? Give an equation and name the products formed.

Exercise - 12C | Q 5.2 | Page 206

How is ethene prepared by dehydration reaction? Give an equation and name the products formed.

Exercise - 12C | Q 6.1 | Page 206

Ethylene when reacts with halogens (chlorine and bromine) form saturated products. Name them and write balanced equations.

Exercise - 12C | Q 6.2 | Page 206

Give the conditions and the main products formed by hydrogenation of ethene.

Exercise - 12C | Q 7.1 | Page 206

Convert ethanol into ethene using Solid dehydrating agent .Give only balanced equations.

Exercise - 12C | Q 7.2 | Page 206

Convert ethanol into ethene using Hot conc. H2SO4 .Give only balanced equation.

Exercise - 12C | Q 8.1 | Page 206

Write the following properties of ethene:

Physical state

Exercise - 12C | Q 8.2 | Page 206

Write the following properties of ethene:

Odour

Exercise - 12C | Q 8.3 | Page 206

Write the following properties of ethene :

Density as compared to air

Exercise - 12C | Q 8.4 | Page 206

Write the following properties of ethene:

Solubility

Exercise - 12C | Q 9.1 | Page 206

How would you convert:

ethyl bromide into ethene ?

Exercise - 12C | Q 9.2 | Page 206

How would you convert:

ethene into 1, 2-dibromoethane?

Exercise - 12C | Q 9.3 | Page 206

How would you convert: ethene into ethane ?

Exercise - 12C | Q 10.1 | Page 206

Give balanced equations when:

ethene is burnt in excess of oxygen

Exercise - 12C | Q 10.2 | Page 206

Give balanced equations when:

ethene reacts with chlorine gas.

Exercise - 12C | Q 10.3 | Page 206

Give balanced equations when:

ethene combines with hydrogen chloride

Exercise - 12C | Q 10.4 | Page 206

Give balanced equations when:

A mixture of ethene and hydrogen is passed over nickel at 200° C.

Exercise - 12C | Q 11.1 | Page 206

Give the formula and name of A, B, C and D in the following equation:

$\ce{CH4 ->[Cl2][-HCl]A ->[Cl2][-HCl]B ->[Cl2][-HCl]C->[Cl2][-HCl]D}$

Exercise - 12C | Q 11.2 | Page 206

Give the formula and name of A, B ,C, and D in the following equation:

$\ce{C2H2 ->[H2]A->[H2]B->[Br2][-HBr]C->[Br2][-HBr]D}$

Exercise - 12C | Q 11.3 | Page 206

Give the formula and name of A, B ,C and D in the following equation:

$\ce{C2H4 + B ->[200°C][Ni]C2H6}$

Exercise - 12C | Q 12.1 | Page 206

Write the name and formula of the product formed in the case below:

C2H4 +Cl2 → ______

Exercise - 12C | Q 12.2

Write the name and formula of the product formed in the case below:

$\ce{C2H5I + KOH(alc.)->[\Delta]}$___________

Exercise - 12C | Q 12.3 | Page 206

Write the name and formula of the product formed in the case below:

$\ce{H2C = CH2 ->[alk.KMnO4]}$__________

Exercise - 12C | Q 12.4 | Page 206

Write the name and formula of the product formed in the case below:

$\ce{H2C = CH2 + HBr →}$___________

Exercise - 12C | Q 13 | Page 206

What do you observe when ethene is passed through alkaline KMnO4 solution?

Exercise - 12C | Q 14 | Page 206

Name three compounds formed by ethene and give one use of each compound.

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Exercise - 12D [Page 210]

Exercise - 12D | Q 1 | Page 210

What are the sources for alkynes? Give the general formula of alkynes.

Exercise - 12D | Q 2 | Page 210

Give an example of isomers shown by triple bond hydrocarbon (alkynes) and write its IUPAC name.

Exercise - 12D | Q 3.1 | Page 210

Draw a diagram of acetylene prepared in the laboratory?

Exercise - 12D | Q 3.2 | Page 210

Give an equation of acetylene prepared in the laboratory ?

Exercise - 12D | Q 3.3 | Page 210

How is pure dry gas collected acetylene prepared in the laboratory?

Exercise - 12D | Q 4 | Page 210

Give the method of preparation of ethyne by 1, 2− dibromoethene.

Exercise - 12D | Q 5.1 | Page 210

Name the hydrocarbon which is a tetrahedral molecule .

Exercise - 12D | Q 5.2 | Page 210

Name the hydrocarbon which is a planar molecule .

Exercise - 12D | Q 5.3 | Page 210

Name the hydrocarbon which is a linear molecule .

Exercise - 12D | Q 5.4 | Page 210

Name the hydrocarbon which forms a red precipitate with ammoniacal solution of copper (I) chloride .

Exercise - 12D | Q 5.5 | Page 210

Name the hydrocarbon which is known as paraffin .

Exercise - 12D | Q 5.6 | Page 210

Name the hydrocarbon which is known as olefin .

Exercise - 12D | Q 5.7 | Page 210

Name the hydrocarbon which:

A compound which will give acetylene (ethene) gas when treated with water.

Exercise - 12D | Q 6.1 | Page 210

Classify the compounds C3H4 as alkanes, alkenes and alkynes ?

Exercise - 12D | Q 6.2 | Page 210

Classify the compounds C3H8 as alkanes, alkenes and alkynes ?

Exercise - 12D | Q 6.3 | Page 210

Classify the compounds C5H8 as alkanes, alkenes and alkynes ?

Exercise - 12D | Q 6.4 | Page 210

Classify the C3Hcompounds as alkanes, alkenes and alkynes ?

Exercise - 12D | Q 7.1 | Page 210

Give a chemical test to distinguish between Saturated and Unsaturated?

Exercise - 12D | Q 7.2 | Page 210

Give a chemical test to distinguish between of ethane and ethene ?

Exercise - 12D | Q 7.3 | Page 210

Give a chemical test to distinguish between of ethene (ethylene) and ethyne (acetylene) ?

Exercise - 12D | Q 8 | Page 210

Compound X bubbled through bromine dissolved in CCl4

$\ce{X ->[Br2/CCl4]}\begin{array}{cc}\ce{H2C - Br}\\|\phantom{.-}\\\ce{H2C - Br}\end{array}$

(a) Draw the structure of X.

(b) State your observation during the reaction.

Exercise - 12D | Q 9.1 | Page 210

Give a balanced equation for the following conversation.

An alkene to an alkane

Exercise - 12D | Q 9.2 | Page 210

Give a balanced equation for the following conversation.

An alkene to an alcohol

Exercise - 12D | Q 9.3 | Page 210

Give a balanced equation for the following conversation.

An alkyne to an alkene

Exercise - 12D | Q 10.1 | Page 210

Name the products formed and write an equation when ethyne is added to the following in an inert solvent:

Chlorine

Exercise - 12D | Q 10.2 | Page 210

Name the products formed and write an equation when ethyne is added to the following in an inert solvent:
Bromine

Exercise - 12D | Q 10.3 | Page 210

Name the products formed and write an equation when ethyne is added to the following in an inert solvent:

Iodine

Exercise - 12D | Q 10.4 | Page 210

Name the products formed and write an equation when ethyne is added to the following in an inert solvent:

hydrogen

Exercise - 12D | Q 10.5 | Page 210

Name the products formed and write an equation when ethyne is added to the following in an inert solvent:

excess of hydrochloric acid

Exercise - 12D | Q 11 | Page 210

Substitution reactions are characteristic reactions of ___________

• alkynes

• alkenes

• alkanes

Exercise - 12D | Q 12.1 | Page 210

Write an equation for the laboratory preparation of

1. An unsaturated hydrocarbon from calcium carbide.
2. Alcohol from ethyl bromide.
Exercise - 12D | Q 12.2 | Page 210

What would you see, when ethyne is bubbled through a solution of bromine in carbon tetrachloride?

Exercise - 12D | Q 12.3 | Page 210

Name the addition product formed between ethene and water

Exercise - 12D | Q 13.1 | Page 210

Give reason of ethyne is more reactive than ethene ?

Exercise - 12D | Q 13.2 | Page 210

Give reason:

Ethene is more reactive then ethane.

Exercise - 12D | Q 13.3 | Page 210

Give reason:

Hydrocarbons are excellent fuels.

Exercise - 12D | Q 14.1 | Page 210

Write a balanced equation:

When butane is burnt in oxygen.

Exercise - 12D | Q 14.1 | Page 210

Write a balanced equation:

Preparation of ethylene from ethyl alcohol.

Exercise - 12D | Q 14.2 | Page 210

Write a balanced equation:

Convert ethane to acetic acid

Exercise - 12D | Q 14.2 | Page 210

Write a balanced equation:

Convert ethyne to ethane

Exercise - 12D | Q 15.1 | Page 210

Write the equation for the preparation of carbon tetrachloride from methane.

Exercise - 12D | Q 15.2 | Page 210

Draw the structure formula of ethyne.

Exercise - 12D | Q 15.3 | Page 210

How is the structure of alkynes different from that of alkenes?

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Exercise - 12E [Page 214]

Exercise - 12E | Q 1.1 | Page 214

what are alcohols? State their sources.

Exercise - 12E | Q 1.2 | Page 214

Give general formulae of monohydric alcohol?

Exercise - 12E | Q 2.1 | Page 214

Give the Dot diagram of the first member of the alcohol

Exercise - 12E | Q 2.2 | Page 214

Give the :  abbreviated formula of the third member of the alcohol

Exercise - 12E | Q 2.3 | Page 214

Give the : Structure of the second member of the alcohol group

Exercise - 12E | Q 2.4 | Page 214

Give the: structure of alcohol with 4 carbon atoms.

Exercise - 12E | Q 3.1 | Page 214

State the method of preparation of ethanol by hydrolysis of ethane.

Exercise - 12E | Q 3.2 | Page 214

State the method of preparation of ethanol by hydrolysis of ethyl bromide.

Exercise - 12E | Q 4 | Page 214

Haloalkanes react with alkalies to produce alcohol. Give the equation for the preparation of the second member of the homologous series of alcohol. State under what condition the reaction occurs.

Exercise - 12E | Q 5.1 | Page 214

How do the boiling point and melting point change in the homologous series of alcohols?

Exercise - 12E | Q 5.2 | Page 214

Name the product formed when ethanol reacts with acetic acid. Give an equation.

What is the name given to this type of reaction?

Exercise - 12E | Q 6.1 | Page 214

Complete and balanced the following equation. State the condition wherever necessary.

CH

||| + H2 →  …………………. + H2  ………………… →

CH

Exercise - 12E | Q 6.2 | Page 214

Complete and balanced the following equation. State the condition wherever necessary.

C2H4 + Br2 →  ……………..

Exercise - 12E | Q 6.3 | Page 214

Complete and balanced the following equation. State the condition wherever necessary.

C2H4 + HCl  → …………….

Exercise - 12E | Q 6.4 | Page 214

Complete and balanced the following equation. State the condition wherever necessary.

CaC2 + H2O → …………….

Exercise - 12E | Q 6.5 | Page 214

Complete and balanced the following equation. State the condition wherever necessary.

C2H2 + Br2 → ………………

Exercise - 12E | Q 6.6 | Page 214

Complete and balanced the following equation. State the condition wherever necessary.

$\ce{C2H5OH ->[O][K2Cr2O7]}$____________

Exercise - 12E | Q 7 | Page 214

What is the effect ethanol on human body.

Exercise - 12E | Q 8.1 | Page 214

How are the absolute alcohol obtained ?

Exercise - 12E | Q 8.2 | Page 214

How are the spurious alcohol obtained ?

Exercise - 12E | Q 8.3 | Page 214

How are the methylated spirit obtained ?

Exercise - 12E | Q 9.1 | Page 214

Name the products formed and give appropriate chemical equations for the sodium reacting with ethyl alcohol ?

Exercise - 12E | Q 9.2 | Page 214

Name the products formed and give appropriate chemical equations for the Ethanol oxidized by acidified potassium dichromate ?

Exercise - 12E | Q 10 | Page 214

Give the trivial (common) names and IUPAC names of the following:

(a) C3H6

(b) C2H4

(c) C2H2

(d) CH3OH

(e) C2H5OH

Exercise - 12E | Q 11 | Page 214

Ethanol can be oxidized to ethanoic acid. Write the equation and name the oxidizing agent.

Exercise - 12E | Q 12.1 | Page 214

Name an organic compound which is used for illuminating country houses ?

Exercise - 12E | Q 12.2 | Page 214

Name an organic compound which is Used for making a household plastic material ?

Exercise - 12E | Q 12.3 | Page 214

Name an organic compound which is Called 'wood spirit' ?

Exercise - 12E | Q 12.4 | Page 214

Name an organic compound which is Poisonous and contains OH group ?

Exercise - 12E | Q 12.5 | Page 214

Name an organic compound which is Consumed as a drink ?

Exercise - 12E | Q 12.6 | Page 214

Name an organic compound which is Made from water gas ?

Exercise - 12E | Q 12.7 | Page 214

Name an organic compound which is: solvent for gums and resins.

Exercise - 12E | Q 12.8 | Page 214

Name an organic compound which is: dehydrated to produce ethene.

Exercise - 12E | Q 13 | Page 214

Ethanol can be converted into ethene which can be changed into ethane. Choose the correct
word or phrase from the brackets to complete the following sentences.
(a) The conversion of ethanol into ethene is an example of ___________
(b) Converting ethanol into ethene requires the use of ___________
(c) The conversion of ethene into ethane is an example of ___________
(d) The catalyst used in the conversion of ethene into ethane is commonly ___________

Exercise - 12E | Q 14.1 | Page 214

Write the equation of the following laboratory preparations:

Ethane from sodium propionate

Exercise - 12E | Q 14.2 | Page 214

Write the equation of the following laboratory preparations:

Ethene from iodoethane

Exercise - 12E | Q 14.3 | Page 214

Write the equation for the following lab preparations:
Ethyne from Calcium carbide

Exercise - 12E | Q 14.4 | Page 214

Write the equation for the following lab preparations:
Methanol from Iodomethane.

Exercise - 12E | Q 15.1 | Page 214

Name the compound prepared by the following reaction:

C2H5COONa +NaOH →

Exercise - 12E | Q 15.2 | Page 214

Name the compound prepared by the following reaction:
CH3I +2H →

Exercise - 12E | Q 15.3 | Page 214

Name the compound prepared by the following reaction:
C2H5Br +KOH (alcoholic solution) →

Exercise - 12E | Q 15.4 | Page 214

Name the compound prepared by the following reaction:
CO + 2H2 (Zinc oxide catalyst) →

Exercise - 12E | Q 15.5 | Page 214

Name the compound prepared by the following reaction:
CaC2 + 2H2O →

Exercise - 12E | Q 16.1 | Page 214

Write the equation for the following reaction:
Calcium carbide and water

Exercise - 12E | Q 16.2 | Page 214

Write the equation for the following reaction:
Ethene and water (steam)

Exercise - 12E | Q 16.3 | Page 214

Write the equation for the following reaction:
Bromoethane and an aqueous solution of sodium hydroxide

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Exercise - 12F [Page 217]

Exercise - 12F | Q 1 | Page 217

What are carboxylic acids? Give their general formula?

Exercise - 12F | Q 2.1 | Page 217

Write the names of First three members of carboxylic acids series

Exercise - 12F | Q 2.2 | Page 217

Write the names of three compounds that can be oxidized directly or in stages to produce acetic acid.

Exercise - 12F | Q 3 | Page 217

Give the structural formulae of acetic acid? IUPAC name of acetic acid. What is glacial acetic acid?

Exercise - 12F | Q 4 | Page 217

Vinegar is greyish in colour with a particular taste. Explain.

Exercise - 12F | Q 5.1 | Page 217

Complete:

Vinegar is prepared by the bacterial oxidation of …………….

Exercise - 12F | Q 5.2 | Page 217

Complete :

The organic acid present in vinegar is ……………………..

Exercise - 12F | Q 5.3 | Page 217

Complete:

The next higher homologue of ethanoic acid is …………………

Exercise - 12F | Q 6.1 | Page 217

How is acetic acid prepared from ethanol?

Exercise - 12F | Q 6.2 | Page 217

How is acetic acid prepared from acetylene?

Exercise - 12F | Q 7.1 | Page 217

What do you notice when acetic acid reacts with litmus ?

Exercise - 12F | Q 7.2 | Page 217

What do you notice when acetic acid reacts with metals ?

Exercise - 12F | Q 7.3 | Page 217

What do you notice when acetic acid reacts with alkalies ?

Exercise - 12F | Q 7.4 | Page 217

What do you notice when acetic acid reacts with alcohol ?

Exercise - 12F | Q 8.1 | Page 217

Acetic acid is a typical acid. Write one equation in case of its reactions with a metal?

Exercise - 12F | Q 8.2 | Page 217

Acetic acid is a typical acid. Write one equation in case of its reactions with a base/alkali?

Exercise - 12F | Q 8.3 | Page 217

Acetic acid is a typical acid. Write one equation in case of its reactions with A carbonate?

Exercise - 12F | Q 8.4 | Page 217

Acetic acid is a typical acid. Write one equation in case of its reactions with A bicarbonate?

Exercise - 12F | Q 9.1 | Page 217

What do you observe when acetic acid is added to sodium bicarbonate ?

Exercise - 12F | Q 9.2 | Page 217

What do you observe when acetic acid is added to ethyl alcohol in the presence of sulphuric acid ?

Exercise - 12F | Q 9.3 | Page 217

What do you observe when acetic acid is added to a neutral FeCl3 solution?

Exercise - 12F | Q 10.1 | Page 217

Name the compound formed when acetic acid and ethanol react together?

Exercise - 12F | Q 10.2 | Page 217

Name the reducing agent used to convert acetic acid into ethanol?

Exercise - 12F | Q 10.3 | Page 217

Name the substance used to change acetic acid to acetic anhydride?

### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 12 Organic Chemistry Miscellaneous [Page 217]

Miscellaneous | Q 1.1 | Page 217

Which of the following statements is wrong about alkanes?

• They are all saturated hydrocarbons.

• They can undergo addition as well as substitution reactions.

• They are almost non-polar in nature.

• On complete combustion, they give out carbon dioxide and water.

Miscellaneous | Q 1.2 | Page 217

The organic compound obtained as the end product of the fermentation of sugar solution is

• Methanol

• Ethanol

• Ethane

• Methanoic acid

Miscellaneous | Q 1.3 | Page 217

Find the odd one out and explain :

• C3H8

•  C5H10

• C2H6

• CH4

Miscellaneous | Q 2.1 | Page 217

Give the chemical equation for :

The laboratory preparation of methane from sodium acetate.

Miscellaneous | Q 2.2 | Page 217

Give the chemical equation for :
The reaction of one mole of ethene with one mole of chlorine gas.

Miscellaneous | Q 2.3 | Page 217

Give the chemical equation for :
The preparation of ethyne from 1, 2-dibromoethane.

Miscellaneous | Q 3.1 | Page 217

State how the following conversion can be carried out:

Ethyl chloride to ethyl alcohol

Miscellaneous | Q 3.2 | Page 217

State how the following conversion can be carried out:

Ethyl chloride to ethene

Miscellaneous | Q 3.3 | Page 217

State how the following conversion can be carried out:

Ethene to ethyl alcohol

Miscellaneous | Q 3.4 | Page 217

State how the following conversion can be carried out:

Ethyl alcohol to ethene

Miscellaneous | Q 4.1 | Page 217

Define isomerism.

Miscellaneous | Q 4.2 | Page 217

Give the IUPAC name of the isomer C4H10 which has a branched-chain.

Miscellaneous | Q 5 | Page 217

A compound X when treated with an organic acid Y (having vinegar-like smell) in the presence of the acid Z, forms a compound P which has a fruity smell.

(a) Identify X, Y, and Z

(b) Write the structural formula of X and Y.

(c) What type of compound P is?

(d)Name the above reaction.

(e) If compound X and Y both have 2 carbon atoms. Write the reaction.

## Chapter 12: Organic Chemistry

Intext QuestionsExercise - 12AExercise - 12BExercise - 12CExercise - 12DExercise - 12EExercise - 12FMiscellaneous

## Selina solutions for Concise Chemistry Class 10 ICSE chapter 12 - Organic Chemistry

Selina solutions for Concise Chemistry Class 10 ICSE chapter 12 (Organic Chemistry) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Concise Chemistry Class 10 ICSE solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Concise Chemistry Class 10 ICSE chapter 12 Organic Chemistry are Uses of Acetic Acid, Chemical Properties of Acetic Acid, Concept of Acetic Acid, Concept of Ethanol, Hydrocarbons - Alkynes, Hydrocarbons - Alkenes,, Hydrocarbons - Alkanes, Simple Nomenclature, Homologous Series, Structure of Compounds with Single, Double and Triple Bonds, Unique Nature of Carbon Atom, Concept of Organic Compounds.

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