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Selina solutions for Concise Science Chemistry 1 Class 9 ICSE chapter 1 - The Language of Chemistry [Latest edition]

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Chapters

Concise Science Chemistry 1 Class 9 ICSE - Shaalaa.com

Chapter 1: The Language of Chemistry

Exercise 1 (A)Exercise 1 (B)Exercise 1 (C)
Exercise 1 (A) [Pages 9 - 10]

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE Chapter 1 The Language of Chemistry Exercise 1 (A) [Pages 9 - 10]

Exercise 1 (A) | Q 1 | Page 9

What is a symbol? What information does it convey?

Exercise 1 (A) | Q 2 | Page 9

Why is the symbol S for sulphur, but Na for sodium and Si for silicon?

Exercise 1 (A) | Q 3 | Page 9

Write the full form of IUPAC. Name the elements represented by the following symbols:

Au, Pb, Sn, Hg

Exercise 1 (A) | Q 4 | Page 9

If the symbol for Cobalt, Co, were written as CO, what would be wrong with it?

Exercise 1 (A) | Q 5.1 | Page 9

What do the following symbol stand for?

H

Exercise 1 (A) | Q 5.2 | Page 9

What do the following symbol stand for?

H2 

Exercise 1 (A) | Q 5.3 | Page 9

What do the following symbol stand for?

2H

Exercise 1 (A) | Q 5.4 | Page 9

What do the following symbol stand for?

2H2 

Exercise 1 (A) | Q 6 | Page 9

What is meant by atomicity? Name the diatomic element.

Exercise 1 (A) | Q 7.1 | Page 9

Explain the terms 'valency' and 'variable valency'.

Exercise 1 (A) | Q 7.2 | Page 9

How are the elements with variable valency named? Explain with an example.

Exercise 1 (A) | Q 8.1 | Page 9

Give the formula and valency of:

aluminate ………………… .

Exercise 1 (A) | Q 8.2 | Page 9

Give the formula and valency of:
chromate ………….…….. .

Exercise 1 (A) | Q 8.3 | Page 9

Give the formula and valency of:
aluminium ………………. .

Exercise 1 (A) | Q 8.4 | Page 9

Give the formula and valency of:
cupric  ………………… . 

Exercise 1 (A) | Q 9 | Page 9

 What is a chemical formula? What is the significance of a formula?give an example to illustrate?​

Exercise 1 (A) | Q 10.1 | Page 9

What do you understand by the following terms?

Acid radical 

Exercise 1 (A) | Q 10.2 | Page 9

What do you understand by the following terms?

Basic radical

Exercise 1 (A) | Q 11.1 | Page 9

Select the basic and acidic radicals in the following compounds.
MgSO4 

Exercise 1 (A) | Q 11.2 | Page 9

Select the basic and acidic radicals in the following compounds.
(NH4)2SO4

Exercise 1 (A) | Q 11.3 | Page 9

Select the basic and acidic radicals in the following compounds.
Al2(SO4)3

Exercise 1 (A) | Q 11.4 | Page 9

Select the basic and acidic radicals in the following compounds.
ZnCO3

Exercise 1 (A) | Q 11.5 | Page 9

Select the basic and acidic radicals in the following compounds.
Mg(OH)2 

Exercise 1 (A) | Q 12 | Page 9

Write chemical formula of the sulphate of Aluminium, Ammonium and Zinc.

Exercise 1 (A) | Q 13 | Page 9

The valency of an element A is 3 and that of element B is 2. Write the formula of the compound formed by the combination of A and B.

 

Exercise 1 (A) | Q 14 | Page 9

Match the following:

Compound

Formula

1. Boric acid

 i. NaOH 

2. Phosphoric acid

 ii. SiO2

3. Nitrous acid

 iii. Na2CO3

4. Nitric acid

 iv. KOH

5. Sulphurous acid

 v. CaCO3

6. Sulphuric acid

 vi. NaHCO3

7. Hydrochloric acid

 vii. H2S

8. Silica (sand)

 viii. H2O

9. Caustic soda

(sodium hydroxide)

 ix. PH3

10. Caustic potash (potassium hydroxide)

 x. CH4

11. Washing soda

(sodium carbonate)

 xi. NH3

12. Baking soda

(sodium bicarbonate)

 xii. HCl 

13. Lime stone.

(calcium carbonate)

 xiii. H2SO3

14. Water

 xiv. HNO3

15. Hydrogen sulphide

 xv. HNO2

16. Ammonia

 xvi. H3BO3

17. Phosphine 

 xvii. H3PO4

18. Methane

 xviii. H2SO4

Exercise 1 (A) | Q 15.01 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compounds.

Barium sulphate

Exercise 1 (A) | Q 15.01 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Potassium ferrocyanide

Exercise 1 (A) | Q 15.02 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compounds.

Bismuth nitrate

Exercise 1 (A) | Q 15.03 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compounds.

Calcium bromide

Exercise 1 (A) | Q 15.04 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Ferrous sulphide 

Exercise 1 (A) | Q 15.05 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Chromium sulphate

Exercise 1 (A) | Q 15.06 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Calcium silicate

Exercise 1 (A) | Q 15.07 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Stannic oxide

Exercise 1 (A) | Q 15.08 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Sodium zincate

Exercise 1 (A) | Q 15.09 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Magnesium phosphate

Exercise 1 (A) | Q 15.1 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Sodium thiosulphate

Exercise 1 (A) | Q 15.11 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Stannic phosphate

Exercise 1 (A) | Q 15.12 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Nickel bisulphate 

Exercise 1 (A) | Q 15.13 | Page 10

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Potassium manganate

Exercise 1 (A) | Q 16.01 | Page 10

Write the chemical name of the following compound:

Ca3(PO4)2

Exercise 1 (A) | Q 16.02 | Page 10

Write the chemical name of the following compound:

K2CO3

Exercise 1 (A) | Q 16.03 | Page 10

Write the chemical name of the following compound:

K2MnO4 

Exercise 1 (A) | Q 16.04 | Page 10

Write the chemical name of the following compound

Mn3(BO3)2

Exercise 1 (A) | Q 16.05 | Page 10

Write the chemical name of the following compound

Mg(HCO3)2 

Exercise 1 (A) | Q 16.06 | Page 10

Write the chemical name of the following compound

Na4Fe(CN)6

Exercise 1 (A) | Q 16.07 | Page 10

Write the chemical name of the following compound

Ba(ClO3)2 

Exercise 1 (A) | Q 16.08 | Page 10

Write the chemical name of the following compound

Ag2SO3

Exercise 1 (A) | Q 16.09 | Page 10

Write the chemical name of the following compound

(CH3COO)2Pb  

Exercise 1 (A) | Q 16.1 | Page 10

Write the chemical name of the following compound

Na2SiO3 

Exercise 1 (A) | Q 17.1 | Page 10

Give the name of the following compound

KCIO

Exercise 1 (A) | Q 17.2 | Page 10

Give the name of the following compound

KClO2

Exercise 1 (A) | Q 17.3 | Page 10

Give the name of the following compound

KClO3

Exercise 1 (A) | Q 17.4 | Page 10

Give the name of the following compound

KClO4 

Exercise 1 (A) | Q 18.1 | Page 10

Complete the following statement by selecting the correct option :  

The formula of a compound represents 

  • an atom

  • a particle

  • a molecule

  • a combination 

Exercise 1 (A) | Q 18.2 | Page 10

Complete the following statement by selecting the correct option :

The correct formula of aluminium oxide is

  • AlO3

  • AlO2

  • Al2O3

Exercise 1 (A) | Q 18.3 | Page 10

Complete the following statement by selecting the correct option :

The valency of nitrogen in nitrogen dioxide (NO2) is

  • one

  • two

  • three

  • four 

Exercise 1 (A) | Q 19.1 | Page 10

Give the name of the element and number of atom of those elements present in the following compound.

Sodium sulphate

Exercise 1 (A) | Q 19.2 | Page 10

Give the name of the element and number of atom of those elements present in the following compound.

Quick lime

Exercise 1 (A) | Q 19.3 | Page 10

Give the name of the element and number of atom of those elements present in the following compound.

Baking soda (NaHCO3)

Exercise 1 (A) | Q 19.4 | Page 10

Give the name of the element and number of atom of those elements present in the following compound.

Ammonia

Exercise 1 (A) | Q 19.5 | Page 10

Give the name of the element and number of atom of those elements present in the following compound.

Ammonium dichromate

Exercise 1 (A) | Q 20.1 | Page 10

The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it

Chloride

Exercise 1 (A) | Q 20.2 | Page 10

The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it

Oxide

Exercise 1 (A) | Q 20.3 | Page 10

The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it

Phosphate

Exercise 1 (A) | Q 20.4 | Page 10

The formula of the sulphate of an element M is M2(SO4)3
Write the formula of its

Acetate

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Exercise 1 (B) [Page 15]

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE Chapter 1 The Language of Chemistry Exercise 1 (B) [Page 15]

Exercise 1 (B) | Q 1 | Page 15

What is a chemical equation? Why it is necessary to balance it?

Exercise 1 (B) | Q 2 | Page 15

State the information conveyed by the following equation:

Zn(s) + 2HCl(aq) → ZnCl2(aq)  + H2 ↑

Exercise 1 (B) | Q 3 | Page 15

What is the limitation of the reaction given in question 2?

Exercise 1 (B) | Q 4.1 | Page 15

Write the chemical equation for the following word equation and balance them.

Carbon   + Oxygen → Carbon dioxide

Exercise 1 (B) | Q 4.2 | Page 15

Write the chemical equation for the following word equation and balance them.

Nitrogen + Oxygen → Nitrogen monoxide

Exercise 1 (B) | Q 4.3 | Page 15

Write the chemical equation for the following word equation and balance them.

Calcium + Nitrogen → Calcium nitride

Exercise 1 (B) | Q 4.4 | Page 15

Write the chemical equation for the following word equation and balance them.

Calcium oxide + Carbon dioxide → Calcium carbonate

Exercise 1 (B) | Q 4.5 | Page 15

Write the chemical equation for the following word equation and balance them.

Magnesium + Sulphuric acid → Magnesium sulphate + Hydrogen

Exercise 1 (B) | Q 4.6 | Page 15

Write the chemical equation for the following word equation and balance them.

Sodium reacts with water to form sodium hydroxide and hydrogen

Exercise 1 (B) | Q 5.01 | Page 15

Balance the following equation:

 Fe + H2O → Fe3O4 + H2

 

Exercise 1 (B) | Q 5.02 | Page 15

Balance the following equation:

Ca + N2 → Ca3N2

Exercise 1 (B) | Q 5.03 | Page 15

Balance the following equation:

Zn + KOH → K2ZnO2 + H2

Exercise 1 (B) | Q 5.04 | Page 15

Balance the following equation:

Fe2O3 + CO → Fe + CO2

Exercise 1 (B) | Q 5.05 | Page 15

Balance the following equation:

PbO + NH3 → Pb + H2O + N2

 

Exercise 1 (B) | Q 5.06 | Page 15

Balance the following equation:

Pb3O4 → PbO + O2

Exercise 1 (B) | Q 5.07 | Page 15

Balance the following equation:

PbS + O2 → PbO + SO2

Exercise 1 (B) | Q 5.08 | Page 15

Balance the following equation:

S + H2SO→ SO2 + H2O

Exercise 1 (B) | Q 5.09 | Page 15

Balance the following equation:

S + HNO3 → H2SO4 + NO2 + H2O

Exercise 1 (B) | Q 5.1 | Page 15

Balance the following equation:

MnO2 + HCl → MnCl2 + H2O + Cl2

Exercise 1 (B) | Q 5.11 | Page 15

Balance the following equation:

C + H2SO4 → CO2 + H2O + SO2

Exercise 1 (B) | Q 5.12 | Page 15

Balance the following equation:

KOH + Cl2 → KCl + KClO + H2O

Exercise 1 (B) | Q 5.13 | Page 15

Balance the following equation:

NO2 +H2O → HNO2 + HNO3

Exercise 1 (B) | Q 5.14 | Page 15

Balance the following equation:

Pb3O4 + HCl → PbCl2 + H2O + Cl2

Exercise 1 (B) | Q 5.15 | Page 15

Balance the following equation:

 H2O + Cl2 → HCl + O2

Exercise 1 (B) | Q 5.16 | Page 15

Balance the following equation:

NaHCO3 → Na2CO3 + H2O + CO2

Exercise 1 (B) | Q 5.17 | Page 15

Balance the following equation:

 HNO3 + H2S → NO2 + H2O + S

Exercise 1 (B) | Q 5.18 | Page 15

Balance the following equation:

P + HNO3 → NO2 + H2O + H3PO4

Exercise 1 (B) | Q 5.19 | Page 15

Balance the following equation:

Zn + HNO3  → Zn(NO3)2 + H2O + NO2

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Exercise 1 (C) [Pages 18 - 19]

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE Chapter 1 The Language of Chemistry Exercise 1 (C) [Pages 18 - 19]

Exercise 1 (C) | Q 1.1 | Page 18

Fill in the blank:

Dalton used symbol _____ for oxygen _____ for hydrogen.

Exercise 1 (C) | Q 1.2 | Page 18

Fill in the blank:

Symbol represents _____ atom(s) of an element.

Exercise 1 (C) | Q 1.3 | Page 18

Fill in the blank:

Symbolic expression for a molecule is called _____.  

Exercise 1 (C) | Q 1.4 | Page 18

Fill in the blank:

Sodium chloride has two radicals. Sodium is a _____ radical while chloride is _____ radical.

Exercise 1 (C) | Q 1.5 | Page 18

Fill in the blank:

Valency of carbon in CH4 is _____ , in C2H_____, in C2H4 ___ and in C2H2 is ____.

Exercise 1 (C) | Q 1.6 | Page 18

Fill in the blank:

Valency of Iron in FeCl2 is _____  and in FeCl3 it is ____ .

Exercise 1 (C) | Q 1.7 | Page 18

Fill in the blank:

Formula of iron (ill) carbonate is _____ .

Exercise 1 (C) | Q 2 | Page 18

Complete the following table.

Acid Radicals Basic Radicals

Chloride

Nitrate

Sulphate 

Carbonate

Hydroxide

Phosphate

Magnesium

MgCl2

Mg(NO3)2

MgSO4

MgCO3

Mg(OH)2

 Mg3(PO4)2

Sodium

 

 

 

 

 

 

Zinc

 

 

 

 

 

 

Silver

 

 

 

 

 

 

Ammonium

 

 

 

 

 

 

Calcium

 

 

 

 

 

 

Iron (II)

 

 

 

 

 

 

Potassium

 

 

 

 

 

 

 

Exercise 1 (C) | Q 3 | Page 19

Sodium chloride reacts with silver nitrate to produce silver chloride and sodium nitrate

Write the equation.

Check whether it is balanced, if not balance it.

Find the weights of reactants and products.

State the law which this equation satisfies. 

Exercise 1 (C) | Q 4.1 | Page 19

What information does the following chemical equation convey?

Zn + H2SO4 → ZnSO4+ H2

Exercise 1 (C) | Q 4.2 | Page 19

What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2

Exercise 1 (C) | Q 5.1 | Page 19

What are polyatomic ions? Give two examples.

Exercise 1 (C) | Q 5.2 | Page 19

Name the fundamental law that is involved in every equation.

Exercise 1 (C) | Q 6.1 | Page 19

What is the valency of :

fluorine in CaF2 

Exercise 1 (C) | Q 6.2 | Page 19

What is the valency of :

sulphur in SF6

Exercise 1 (C) | Q 6.3 | Page 19

What is the valency of :

phosphorus in PH3 

Exercise 1 (C) | Q 6.4 | Page 19

What is the valency of :

carbon in CH4

Exercise 1 (C) | Q 6.5 | Page 19

What is the valency of :

nitrogen in the following compounds:

(i) N2O3 (ii) N2O5 (iii) NO2 (iv) NO

 

 

Exercise 1 (C) | Q 6.6 | Page 19

What is the valency of :

Manganese in MnO2

Exercise 1 (C) | Q 6.7 | Page 19

What is the valency of : 

Copper is Cu2O

Exercise 1 (C) | Q 6.8 | Page 19

What is the valency of :

Magnesium in Mg3N2

Exercise 1 (C) | Q 7 | Page 19

Why should an equation be balanced? Explain with the help of a simple equation.

Exercise 1 (C) | Q 8.01 | Page 19

Write the balanced chemical equation of the following reaction. sodium hydroxide + sulphuric acid → sodium sulphate + water

Exercise 1 (C) | Q 8.02 | Page 19

Write the balanced chemical equation of the following reaction.
potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water

Exercise 1 (C) | Q 8.03 | Page 19

Write the balanced chemical equation of the following reaction. iron + sulphuric acid → ferrous sulphate + hydrogen.

Exercise 1 (C) | Q 8.04 | Page 19

Write the balanced chemical equations of the following reactions.

chlorine + sulphur dioxide + water →  sulphuric acid + hydrogen chloride

Exercise 1 (C) | Q 8.05 | Page 19

Write the balanced chemical equation of the following reaction.

silver nitrate → silver + nitrogen dioxide + oxygen

Exercise 1 (C) | Q 8.06 | Page 19

Write the balanced chemical equation of the following reaction.

copper + nitric acid → copper nitrate + nitric oxide + water

Exercise 1 (C) | Q 8.07 | Page 19

Write the balanced chemical equation of the following reaction.

ammonia + oxygen → nitric oxide + water

Exercise 1 (C) | Q 8.08 | Page 19

Write the balanced chemical equation of the following reaction.

barium chloride + sulphuric acid → barium sulphate + hydrochloric acid

Exercise 1 (C) | Q 8.09 | Page 19

Write the balanced chemical equation of the following reaction.

zinc sulphide + oxygen → zinc oxide + sulphur dioxide

Exercise 1 (C) | Q 8.1 | Page 19

Write the balanced chemical equation of the following reaction.

aluminium carbide + water → aluminium hydroxide + methane

Exercise 1 (C) | Q 8.11 | Page 19

Write the balanced chemical equation of the following reaction.

iron pyrites(FeS2) + oxygen → ferric oxide + sulphur dioxide

Exercise 1 (C) | Q 8.12 | Page 19

Write the balanced chemical equation of the following reaction.

potassium permanganate + hydrochloric acid → potassium chloride + manganese chloride + chlorine + water

Exercise 1 (C) | Q 8.13 | Page 19

Write the balanced chemical equation of the following reaction.

aluminium sulphate + sodium hydroxide → sodium sulphate + sodium meta aluminate + water.

Exercise 1 (C) | Q 8.14 | Page 19

Write the balanced chemical equation of the following reaction.

aluminium + sodium hydroxide + water → sodium meta aluminate + hydrogen

Exercise 1 (C) | Q 8.15 | Page 19

Write the balanced chemical equation of the following reaction.

potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.

Exercise 1 (C) | Q 8.16 | Page 19

Write the balanced chemical equation of the following reaction.

potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine

Exercise 1 (C) | Q 8.17 | Page 19

Write the balanced chemical equation of the following reaction.

sulphur + nitric acid→ sulphuric acid  + nitrogen dioxide + water.

Exercise 1 (C) | Q 8.18 | Page 19

Write the balanced chemical equation of the following reaction.

sodium chloride + manganese dioxide + sulphuric acid → sodium hydrogen sulphate  + manganese sulphate + water + chlorine.

Exercise 1 (C) | Q 9.1 | Page 19

Define atomic mass unit.

Exercise 1 (C) | Q 9.2 | Page 19

Calculate the molecular mass of the following:

(NH4)2CO3  

Given atomic mass of Cu = 63·5, H = 1, O= 16, C = 12, N = 14, Mg = 24, S = 32

Exercise 1 (C) | Q 9.2 | Page 19

 Calculate the molecular mass of the following:

(NH2)2CO   

Given atomic mass of Cu = 63·5, H = 1, O= 16, C = 12, N = 14, Mg = 24, S = 32

Exercise 1 (C) | Q 9.2 | Page 19

Calculate the molecular mass of the following:

Mg3N2

Given atomic mass of Cu = 63·5, H = 1, O = 16, C = 12, N = 14, Mg = 24, S = 32

Exercise 1 (C) | Q 9.2 | Page 19

Calculate the molecular mass of the following:

Na2SO4.10H2O

Given atomic mass of Cu = 63·5, H = 1, O= 16, C = 12, N = 14, Mg = 24, S = 32

 

Exercise 1 (C) | Q 10.1 | Page 19

Choose the correct answer from the option given below.

Modern atomic symbols are based on the method proposed by

  • Bohr

  • Dalton

  •  Berzelius

  • Alchemist 

Exercise 1 (C) | Q 10.2 | Page 19

Choose the correct answer from the options given below.

The number of carbon atoms in a hydrogen carbonate radical is

  • One

  • Two

  • Three

  • Four

Exercise 1 (C) | Q 10.3 | Page 19

Choose the correct answer from the options given below.

The formula of iron (III) sulphate is

  •  Fe3SO4 

  •  Fe(SO4)3

  • Fe2(SO4)3

  • FeSO4 

Exercise 1 (C) | Q 10.4 | Page 19

Choose the correct answer from the options given below.

In water, the hydrogen-to-oxygen mass ratio is 

  • 1: 8

  • 1: 16

  • 1: 32 

  • 1: 64

Exercise 1 (C) | Q 10.5 | Page 19

Choose the correct answer from the options given below.

The formula of sodium carbonate is Na2CO3 and that of calcium hydrogen carbonate is

  •  CaHCO3

  • Ca(HCO3)2

  • Ca2HCO3

  •  Ca(HCO3)3

Exercise 1 (C) | Q 11.1 | Page 19

Correct the following statement:

A molecular formula represents an element.

Exercise 1 (C) | Q 11.2 | Page 19

Correct the following statement:

Molecular formula of water is H2O2

Exercise 1 (C) | Q 11.3 | Page 19

Correct the following statement:

A molecule of sulphur is monoatomic.

Exercise 1 (C) | Q 11.4 | Page 19

Correct the following statement:

CO and Co  both represents cobalt.

Exercise 1 (C) | Q 11.5 | Page 19

Correct the following statement:

Formula of iron (lll) oxide is FeO.

Exercise 1 (C) | Q 12.1 | Page 19

Calculate the relative molecular masses of the following

CHCI3

[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]

Exercise 1 (C) | Q 12.2 | Page 19

Calculate the relative molecular masses of the following 

(NH4)2 Cr2O7

[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]

Exercise 1 (C) | Q 12.3 | Page 19

Calculate the molecular mass of the following:

CuSO4·5H2O

Given atomic mass of Cu = 63·5, H = 1, O = 16, C=12, N = 14, Mg = 24, S = 32

Exercise 1 (C) | Q 12.4 | Page 19

Calculate the molecular mass of the following:

(NH₄)₂SO₄

[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]

Exercise 1 (C) | Q 12.5 | Page 19

Calculate the molecular mass of the following:

CH₃COONa

[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]

Exercise 1 (C) | Q 12.6 | Page 19

Calculate the molecular mass of the following:

Potassium Chlorate.

At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]

Exercise 1 (C) | Q 12.7 | Page 19

Calculate the molecular mass of the following:

Ammonium chloroplatinate (NH4)2 PtCI6

[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]

Exercise 1 (C) | Q 13.1 | Page 19

Give the empirical formula of : Benzene C6H6

Exercise 1 (C) | Q 13.2 | Page 19

Give the empirical formula of Glucose C6H12O.

Exercise 1 (C) | Q 13.3 | Page 19

Give the empirical formula of Acetylene C2H2

Exercise 1 (C) | Q 13.4 | Page 19

Give the empirical formula of Acitic Acid CH3COOH.

Exercise 1 (C) | Q 14 | Page 19

Find the percentage of mass water in Epsom salt MgSO4.7H2O.

Exercise 1 (C) | Q 15.1 | Page 19

Calculate the percentage of phosphorus in calcium hydrogen phosphate Ca(H2PO4).

Exercise 1 (C) | Q 15.2 | Page 19

calculate the percentage of phosphorus in Calcium Phosphate Ca3(PO4)2.

Exercise 1 (C) | Q 16 | Page 19

Calculate the percentage composition of each element in Potassium chlorate KCIO3 .

Exercise 1 (C) | Q 17 | Page 19

Urea is a very important nitrogenous fertilizer. Its formula is CON2H4. Calculate the percentage of carbon in urea. (C = 12, O = 16, N = 14 and H = 1)

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Chapter 1: The Language of Chemistry

Exercise 1 (A)Exercise 1 (B)Exercise 1 (C)
Concise Science Chemistry 1 Class 9 ICSE - Shaalaa.com

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE chapter 1 - The Language of Chemistry

Selina solutions for Concise Science Chemistry 1 Class 9 ICSE chapter 1 (The Language of 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 Science Chemistry 1 Class 9 ICSE solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Concise Science Chemistry 1 Class 9 ICSE chapter 1 The Language of Chemistry are Writing Chemical Formulae, Naming Certain Compounds, Concept of Molecular Mass, Chemical Equation, Percentage Composition, Empirical Formula of a Compound, Concept for Language of Chemistry, Symbols of Elements, Radicals, Chemical Equation, Mass Number (A) or Atomic Mass, Valency and Its Types, Concept of Hydrogen, Symbols of Elements, Balancing Simple Equations.

Using Selina Class 9 solutions The Language of Chemistry exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 9 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 1 The Language of Chemistry Class 9 extra questions for Concise Science Chemistry 1 Class 9 ICSE and can use Shaalaa.com to keep it handy for your exam preparation

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