# Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry chapter 1 - The Language Of Chemistry [Latest edition]

## Chapter 1: The Language Of Chemistry

Exercise

### Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry Chapter 1 The Language Of Chemistry Exercise

Exercise | Q 1

An element X is trivalent. Write the balanced equation for the combustion of X in oxygen.

Exercise | Q 1

The formula of the nitride of a metal X is XN, state the formula of :

1. its sulphate
2. its hydroxide.
Exercise | Q 1

What is the valency of nitrogen in :

1. NO
2. N2O
3. NO2
Exercise | Q 1

XCl2 is the chloride of a metal X. State the formula of the sulphate and the hydroxide of the metal X.

### Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry Chapter 1 The Language Of Chemistry Additional Questions

What is meant by the term ‘symbol’?

Give the qualitative and quantitative meaning of the term ‘symbol’.

Name three metals whose symbols are derived from: the first letter of the name of the element

Name three metals whose symbols are derived: from their Latin names.

Explain the meaning of the term ‘valency’.

State why the valency of the metal potassium is +1 and of the non-metal chlorine is -1.

What is meant by the term ‘variable valency’. Give a reason why silver exhibits a valency of +1 and +2.

Give examples of eight metals that show variable valency.

State the valency of sulphur in :

(a) SO2
(b) SO3

State the name of the element or radical given below

K

State the valency of the element or radical given below

K

State the name of the element or radical given below

Cr2O7

State the valency of the element or radical given below

Cr2O7

State the name of the element or radical given below

Cl

State the name of the element or radical given below

Cl

State the valency of the element or radical given below

Cl

State the name of the element or radical given below

Ni

State the valency of the element or radical given below

Ni

State the name of the element or radical given below

ClO3

State the valency of the element or radical given below

ClO3

State the name of the element or radical given below

CO3

State the valency of the element or radical given below

CO3

State the name of the element or radical given below

Ba

State the valency of the element or radical given below

Ba

State the name of the element or radical given below

HCO3

State the valency of the element or radical given below

HCO3

State the name of the element or radical given below

NO2

State the valency of the element or radical given below

NO2

State the name of the element or radical given below

Na

State the valency of the element or radical given below

Na

State the name of the element or radical given below

Br

State the valency of the element or radical given below

Br

State the name of the element or radical given below

Zn

State the valency of the element or radical given below

Zn

State the name of the element or radical given below

Mg

State the valency of the element or radical given below

Mg

State the name of the element or radical given below

O

State the valency of the element or radical given below

O

State the name of the element or radical given below

Co

State the valency of the element or radical given below

Co

State the name of the element or radical given below

CrO4

State the valency of the element or radical given below

CrO4

State the name of the element or radical given below

ClO

State the valency of the element or radical given below

ClO

State the name of the element or radical given below

MnO4

State the valency of the element or radical given below

MnO4

State the name of the element or radical given below

Li

State the valency of the element or radical given below

Li

State the name of the element or radical given below

I

State the valency of the element or radical given below

I

State the name of the element or radical given below

OH

State the valency of the element or radical given below

OH

State the name of the element or radical given below

O2

State the valency of the element or radical given below

O2

State the name of the element or radical given below

ZnO2

State the valency of the element or radical given below

ZnO2

State the name of the element or radical given below

SiO3

State the valency of the element or radical given below

SiO3

State the name of the element or radical given below

NO3

State the valency of the element or radical given below

NO3

State the name of the element or radical given below

SO3

State the valency of the element or radical given below

SO3

State the name of the element or radical given below

SO4

State the valency of the element or radical given below

SO4

State the name of the element or radical given below

PO4

State the valency of the element or radical given below

PO4

State the name of the element or radical given below

N

State the valency of the element or radical given below

N

State the name of the element or radical given below

C

State the valency of the element or radical given below

C

State the name of the element or radical given below

PO3

State the valency of the element or radical given below

PO3

State the name of the element or radical given below

Al

State the valency of the element or radical given below

Al

State the name of the element or radical given below

Ca

State the valency of the element or radical given below

Ca

State the name of the element or radical given below

H

State the valency of the element or radical given below

H

State the name of the element or radical given below

PbO2

State the valency of the element or radical given below

PbO2

State the name of the element or radical given below

HSO3

State the valency of the element or radical given below

HSO3

State the name of the element or radical given below

AlO2

State the valency of the element or radical given below

AlO2

State the name of the element or radical given below

Cr

State the valency of the element or radical given below

Cr

State the name of the element or radical given below

HSO4

State the valency of the element or radical given below

HSO4

State the name of the element or radical given below

NH4

State the valency of the element or radical given below

NH4

State the variable valencies of the following element and give their name.

Cu

State the variable valencies of the following element and give their name.

Ag

State the variable valencies of the following element and give their name.

Hg

State the variable valencies of the following element and give their name.

Fe

State the variable valencies of the following element and give their name.

Pb

State the variable valencies of the following element and give their name.

Sn

State the variable valencies of the following element and give their name.

Mn

State the variable valencies of the following element and give their name.

Pt

State the variable valencies of the following element and give their name.

Au

State if the following element or radical is divalent?

Lithium

State if the following element or radical is divalent?

Nickel

State if the following element or radical is divalent?

Ammonium

State if the following element or radical is divalent?

Bromide

State if the following element or radical is divalent?

Sulphite

State if the following element or radical is divalent?

Nitride

State if the following element or radical is divalent?

Carbide

State if the following element or radical is divalent?

Chromium

State if the following element or radical is divalent?

Bisulphite

State if the following element or radical is divalent?

Dichromate

State if the following element or radical is divalent?

Permanganate

Explain the meaning of the term ‘compound’ with a suitable example.

State the main characteristics of a compound with special reference to the compound iron [II] sulphide.

Name the element in the compound and give the formula of the following compound:

Nitric acid

Name the element in the compound and give the formula of the following compound:

Carbonic acid

Name the element in the compound and give the formula of the following compound:

Phosphoric acid

Name the element in the compound and give the formula of the following compound:

Acetic acid

Name the element in the compound and give the formula of the following compound:

Blue vitriol

Name the element in the compound and give the formula of the following compound:

Green vitriol

Name the element in the compound and give the formula of the following compound:

Glauber’s salt

Name the element in the compound and give the formula of the following compound:

Ethane

Name the element in the compound and give the formula of the following compound:

Ethanol

Explain the terms ‘chemical formula’.

State why the molecular formula of zinc carbonate is ZnCO.

Write the formula of the following compound:
Potassium nitrate
Write the formula of the following compound:
Potassium carbonate
Write the formula of the following compound:
Potassium bisulphate
Write the formula of the following compound:
Potassium sulphite

Write the formula of the following compound:

Potassium dichromate

Write the formula of the following compound:

Potassium permanganate

Write the formula of the following compound:

Potassium zincate

Write the formula of the following compound:

Potassium plumbite

Write the formula of the following compound:

Potassium sulphate

Write the formula of the following compound:

Potassium bicarbonate

Write the formula of the following compound:

Potassium aluminate

Write the formula of the following compound:

Potassium hydroxide

Write the formula of the following compound:

Potassium iodide

Write the formula of the following compound:

Potassium nitrite

Write the formula of the following compound:

Potassium bisulphite

Write the formula of the following compound:
Potassium chloride

Write the formula of the following compound:

Sodium chloride

Write the formula of the following compound:

Sodium nitrate

Write the formula of the following compound:

Sodium carbonate

Write the formula of the following compound:

Sodium bisulphate

Write the formula of the following compound:

Sodium sulphite

Write the formula of the following compound:

Sodium dichromate

Write the formula of the following compound:

Sodium permanganate

Write the formula of the following compound:

Sodium zincate

Write the formula of the following compound:

Sodium plumbite

Write the formula of the following compound:

Sodium sulphate

Write the formula of the following compound:

Sodium bicarbonate

Write the formula of the following compound:

Sodium aluminate

Write the formula of the following compound:

Sodium hydroxide

Write the formula of the following compound:

Sodium iodide

Write the formula of the following compound:

Sodium nitrite

Write the formula of the following compound:

Sodium bisulphite

Write the formula of the following compound:

Calcium chloride

Write the formula of the following compound:

Calcium nitrate

Write the formula of the following compound:

Calcium carbonate

Write the formula of the following compound:

Calcium bisulphite

Write the formula of the following compound:

Calcium sulphite

Write the formula of the following compound:

Calcium sulphate

Write the formula of the following compound:

Calcium bicarbonate

Write the formula of the following compound:

Calcium hydroxide

Write the formula of the following compound:

Magnesium chloride

Write the formula of the following compound:

Magnesium nitrate

Write the formula of the following compound:

Magnesium carbonate

Write the formula of the following compound:

Magnesium sulphate

Write the formula of the following compound:

Magnesium bicarbonate

Write the formula of the following compound:

Magnesium hydroxide

Write the formula of the following compound:

Magnesium oxide

Write the formula of the following compound:

Zinc chloride

Write the formula of the following compound:

Zinc nitrate

Write the formula of the following compound:

Zinc carbonate

Write the formula of the following compound:

Zinc sulphate

Write the formula of the following compound:

Zinc hydroxide

Write the formula of the following compound:

Zinc oxide

Write the formula of the following compound:

Zinc oxide

Write the formula of the following compound:

Aluminium chloride

Write the formula of the following compound:

Aluminium nitrate

Write the formula of the following compound:

Aluminium carbonate

Write the formula of the following compound:

Aluminium sulphate

Write the formula of the following compound:

Aluminium hydroxide

Write the formula of the following compound:

Aluminium hydroxide

Write the formula of the following compound:

Aluminium oxide

Write the formula of the following compound:

Copper [I] chloride

Write the formula of the following compound:

Copper [II] chloride

Write the formula of the following compound:

Copper [I] oxide

Write the formula of the following compound:

Copper [II] oxide

Write the formula of the following compound:

Copper [I] sulphide

Write the formula of the following compound:

Copper [II] sulphide

Write the formula of the following compound:

Copper [II] nitrate

Write the formula of the following compound:

Copper [II] sulphate

Write the formula of the following compound:

Tetra amine copper [II] sulphate

Write the formula of the following compound:

Iron [II] chloride

Write the formula of the following compound:

Iron [III] chloride

Write the formula of the following compound:

Iron [II] oxide

Write the formula of the following compound:

Iron [III] oxide

Write the formula of the following compound:

Iron [II] sulphate

Write the formula of the following compound:

Iron [III] sulphate

Write the formula of the following compound:

Iron [II] sulphide

Write the formula of the following compound:

Iron [III] sulphide

Write the formula of the following compound:

Iron [II] hydroxide

Write the formula of the following compound:

Iron [III] hydroxide

Write the formula of the following compound:

Write the formula of the following compound:

Write the formula of the following compound:

Write the formula of the following compound:

Write the formula of the following compound:

Write the formula of the following compound:

Silver [I] chloride

Write the formula of the following compound:

Silver [II] chloride

Write the formula of the following compound:

Diamine silver chloride

Write the name of the following compound:

KClO

Write the name of the following compound:

HClO

Write the name of the following compound:

NaClO3

Write the name of the following compound:

AIN

Write the name of the following compound:

K2Cr2O7

Write the name of the following compound:

KMnO4

Write the name of the following compound:

Ca3N2

Write the name of the following compound:

Ca3(PO4)2

Write the name of the following compound:

H2SO

Write the name of the following compound:

HCl

Write the name of the following compound:

HNO

Write the name of the following compound:

H2SO

Write the name of the following compound:

NH4OH

Write the name of the following compound:

NaOH

Write the name of the following compound:

H2CO

Write the name of the following compound:

HNO2

Write the name of the following compound:

Mg(HCO3)2

Write the name of the following compound:

NaAlO2

Write the name of the following compound:

K2PbO2

Write the name of the following compound:

Cr2(SO4)3

Write the name of the following compound:

Na2O

Explain the term ‘chemical equation’.

What is meant by ‘reactants’ and ‘products’ in a chemical equation?

Give an example of a chemical equation in which two reactants form:

one product

Give an example of a chemical equation in which two reactants form:

two product

Give an example of a chemical equation in which two reactants form:

three product

Give an example of a chemical equation in which two reactants form:

four product

$\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}$

State what is a ‘balanced equation’.

$\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}$

Give a reason why the above equation is balanced.

$\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}$

State why the compound MnO2 is written above the arrow.

What does the symbol '→' present in a chemical equation, mean?

What does the symbol '⇌' present in a chemical equation, mean?

What does the symbol '(s)' present in a chemical equation, mean?

What does the symbol '(l)' present in a chemical equation, mean?

What does the symbol '(g)' present in a chemical equation, mean?

What does the symbol '(aq.)' present in a chemical equation, mean?

CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]

State the information provided by the above chemical equation.

CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]

State the information not conveyed by the above chemical equation.

Balance the following simple equation:

C   +   O2  →  CO

Balance the following simple equation:

N2   +   O2  ⇌  NO

Balance the following simple equation:

ZnS   +   O2  →  ZnO + SO2

Balance the following simple equation:

Al   +   O2  →  Al2O3

Balance the following simple equation:

Mg   +   N2  →  Mg3N2

Balance the following simple equation:

Al   +   N2  →  AlN

Balance the following simple equation:

NO   +   O2  →  NO2

Balance the following simple equation:

SO2   +   O2  ⇌  SO3

Balance the following simple equation:

H2   +   Cl2  →  HCl

Balance the following simple equation:

Fe   +   Cl2  →  FeCl3

Balance the following simple equation:

H2S   +   Cl2  →  S  +  HCl

Balance the following simple equation:

FeCl2   +   Cl2  →  FeCl3

Balance the following simple equation:

CO2   +   C  →  CO

Balance the following simple equation:

KHCO3 →  K2CO3   +    H2O   +   CO2

Balance the following simple equation:

K   +   CO2   →    K2O   +   C

Balance the following simple equation:

Ca(OH)2   +   HNO3   →   Ca(NO3)2   +   H2

Balance the following simple equation:

K  +   H2O   →   KOH   +   H2

Balance the following simple equation:

Ca  +   H2O   →   Ca(OH)2   +   H2

Balance the following simple equation:

Al  +   H2O   →   Al2O3   +   H2

Balance the following simple equation:

Fe  +   H2O  ⇌   Fe3O4   +   H2

Balance the following simple equation:

Zn  +   NaOH  →   Na2ZnO2   +   H2

Balance the following simple equation:

Zn  +   HCl  →   ZnCl2   +   H2

Balance the following simple equation:

Al  +   H2SO4  →   Al2(SO4)3   +   H2

Balance the following simple equation:

H2  +   O2  →   H2O

Balance the following simple equation:

N2  +  H2  ⇌   NH3

Balance the following simple equation:

Fe2O3  +  H2  → Fe  +  H2O

Balance the following simple equation:

KBr  +  Cl2  → KCl  +  Br2

Balance the following simple equation:

NaOH  +  Cl2  →  NaCl  +   NaClO  +  H2

Balance the following simple equation:

NaHCO3  +  H2SO4  →  Na2SO4  +  H2O  +  CO2

Balance the following simple equation:

Mg  +  CO2  →  MgO  +  C

Balance the following simple equation:

Fe2O3  +  CO  →  Fe  +  CO2

Balance the following simple equation:

CaO  +  HCl  →  CaCl2  +  H2

Write a balanced equation for the following word equation:

Potassium nitrate → Potassium nitrite + Oxygen

Write a correctly balanced equation for the following “word equation”:
calcium + water → calcium hydroxide + hydrogen

Write a balanced equation for the following word equation:

Iron + Hydrochloric acid → Iron [II] chloride + Hydrogen

Write a balanced equation for the following word equation:

Nitrogen dioxide + Water + Oxygen → Nitric acid

Write a balanced equation for the following word equation:

Write a balanced equation for the following word equation:

Aluminium + Oxygen → Aluminium oxide

Write a balanced chemical equation for the following word equation:

Iron + Chlorine → Iron (III) chloride

Write a balanced equation for the following word equation:

Potassium bromide + Chlorine → Potassium chloride + Bromine

Write a balanced equation for the following word equation:

Potassium bicarbonate → Potassium carbonate + Water + Carbon dioxide

Write a balanced equation for the following word equation:

Calcium hydroxide + Ammonium chloride → Calcium chloride + Water + Ammonia

Balance the following important equation:

NaHCO3 + H2SO4 → Na2SO4 + H2O + CO2

Balance the following important equation:

NaOH + H2SO4 → Na2SO4 + H2

Balance the following important equation:

Pb(NO3)2 + NaCl → NaNO3 + PbCl2

Balance the following important equation:

FeSO4 + NaOH → Na2SO4 + Fe(OH)2

Balance the following important equation:

FeCl3 + NaOH → NaCl + Fe(OH)3

Balance the following important equation:

CuSO4 + NaOH → Na2SO4 + Cu(OH)2

Balance the following important equation:

FeCl3 + NH4OH → NH4Cl + Fe(OH)3

Balance the following important equation:

ZnO + NaOH → Na2ZnO2 + H2O

Balance the following important equation:

Pb(OH)2 + NaOH → Na2PbO2 + H2O

Balance the following important equation:

Al2O3.2H2O + NaOH → NaAlO2 + H2O

Balance the following important equation:

NaAlO2 + H2O  → NaOH  + Al(OH)3

Balance the following important equation:

Al(OH)3  → Al2O3  + H2

Balance the following important equation:

ZnS  + O2  → ZnO + SO2

Balance the following important equation:

Fe2O3  + Al  → Al2O3 + Fe

Balance the following important equation:

Al + Cl2  → AlCl3

Balance the following important equation:

NaCl + H2SO4  → Na2SO4 + HCl

Balance the following important equation:

Fe + HCl  → FeCl2 + H2

Balance the following important equation:

Na2CO3 + HCl → NaCl + H2O + CO2

Balance the following important equation:

Pb(NO3)2 + HCl → PbCl2 + HNO3

Balance the following important equation:

AgCl + NH4OH → Ag(NH3)2Cl + H2O

Balance the following important equation:

MnO2 + HCl → MnCl2 + H2O + Cl2

Balance the following important equation:

Pb3O2 + HCl → PbCl2 + H2O + Cl2

Balance the following important equation:

KMnO4 + HCl → KCl + MnCl2 + H2O + Cl2

Balance the following important equation:

K2Cr2O7 + HCl → KCl + CrCl3 + H2O + Cl2

Balance the following important equation:

NH4Cl + Ca(OH)2 → CaCl2 + H2O + NH3

Balance the following important equation:

(NH4)2SO4 + NaOH → Na2SO4 + H2O + NH3

Balance the following important equation:

Mg3N2 + H2O → Mg(OH)2 + NH3

Balance the following important equation:

AIN + H2O → Al(OH)2 + NH3

Balance the following important equation:

NH3 + O2 → N2 + H2O (burning of NH3

Balance the following important equation:

NH3 + O2 → NO + H2O (catalytic oxidation of  NH3

Balance the following important equation:

NH4OH + H2SO4 → (NH4)2SO4 + H2

Balance the following important equation:

NH3 + CuO → Cu + H2O + N2

Balance the following important equation:

NH3 + Cl2 → HCl + NCl3  [nitrogen trichloride]

Balance the following important equation:

HNO3  → H2O + NO2 + O2

Balance the following important equation:

Ca(HCO3)2 + HNO3  → Ca(NO3)2 + H2O + CO2

Balance the following important equation:

C + HNO3 (conc.) → CO2 + H2O + NO2

Balance the following important equation:

S + HNO3 (conc.) → H2SO4 + H2O + NO2

Balance the following important equation:

Cu + HNO3 (conc.) → Cu(NO3)2 + H2O + NO2

Balance the following important equation:

C + H2SO4 (conc.) → CO2 + H2O + SO2

Balance the following important equation:

S + H2SO4 (conc.) → SO2 + H2

Balance the following important equation:

Cu + H2SO4 (conc.) → CuSO4 + H2O + SO2

Give a balanced equation by partial equation method, [steps are given below].

The reaction of excess ammonia with chlorine – Ammonia as a reducing agent

1. Ammonia first reacts with chlorine to give hydrogen chloride and nitrogen.
2. Hydrogen chloride then further reacts with excess ammonia to give ammonium chloride.

Give a balanced equation by partial equation method, [steps are given below].

Oxidation of Lead [II] Sulphide by Ozone

1. Ozone first decomposes to give molecular oxygen & nascent oxygen.
2. Nascent oxygen then oxidises lead [II] sulphide to lead [II] sulphate.

Define the term Relative atomic mass. State why indirect methods are utilised to determine the absolute mass of an atom. Explain in brief the indirect method used.

Define the term Relative molecular mass. State why indirect methods are utilised to determine the absolute mass of an atom. Explain in brief the indirect method used.

Calculate the relative molecular mass of CaSO4 [Zn = 65, S=32, O = 16, Ca = 40, C = 12]

Calculate the relative molecular mass of ZnCO3.

Calculate the percentage composition of calcium chloride.

Calculate the percentage composition of calcium nitrate [Ca = 40 , Cl = 35.5 , N = 14 , O = 16]

The Language Of Chemistry

### Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry Chapter 1 The Language Of Chemistry The Language Of Chemistry

The Language Of Chemistry | Q 1

Match the names of ions and radicals from 1 to 10 with their correct answer from A to Q.

 Column A Column B 1. Hypochloride A: Hg2+ 2. Permanganate B: $\ce{MnO_4^1-}$ 3. Plumbous C: Sn4+ 4. Zincate D: Pb2+ 5. Nitride E: Sn2+ 6. Mercuric F: Pb4+ 7. Stannic G: $\ce{SO_3^2-}$ 8. Nitrite H: N3- 9. Sulphite I: $\ce{NO_2^1-}$ 10. Dichromate J: $\ce{MnO_4^2-}$ K: Hg1+ L: $\ce{SO_4^2-}$ M: CIO1- N: $\ce{ZnO_2^2-}$ O: $\ce{Cr_2O_7^2-}$ P: $\ce{CrO_4^2-}$ Q: $\ce{ClO_3^1-}$
The Language Of Chemistry | Q 2.01

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

(NH4)3SO4

The Language Of Chemistry | Q 2.02

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

NaZnO2

The Language Of Chemistry | Q 2.03

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

KCr2O7

The Language Of Chemistry | Q 2.04

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

NaCO3

The Language Of Chemistry | Q 2.05

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

Ca2(PO4)3

The Language Of Chemistry | Q 2.06

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

Mg(SO4)2

The Language Of Chemistry | Q 2.07

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

KNO3

The Language Of Chemistry | Q 2.08

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

NaClO

The Language Of Chemistry | Q 2.09

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

NaO

The Language Of Chemistry | Q 2.1

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

BaCl2

The Language Of Chemistry | Q 3.1

Fill in the blank with the correct word from the  options given below:

A symbol represents a short form of a / an ________.

• atom

• element

• molecule

The Language Of Chemistry | Q 3.2

Fill in the blank with the correct word from the options given below:

Compounds are always _______ in nature.

• heterogeneous

• homogeneous

The Language Of Chemistry | Q 3.3

Fill in the blank with the correct word from the options given below:

Variable valency is exhibited since electrons are lost from an element from the __________ shell.

• valence

• penultimate

The Language Of Chemistry | Q 3.4

Fill in the blank with the correct word from the options given below:

A chemical equation is a shorthand form for a _______ change.

• physical

• chemical

The Language Of Chemistry | Q 3.5

Fill in the blank with the correct word from the options given below:

Relative molecular mass of an element/compound is the number of times one ________ of the substance is heavier than −1/12that the mass of an atom of carbon [C12].

• atom

• ion

• molecule

The Language Of Chemistry | Q 4.01

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

Na2SO3 + HCl → 2NaCl + H2O + SO2

The Language Of Chemistry | Q 4.02

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

CaC2 + N2 → 2CaCN2 + C

The Language Of Chemistry | Q 4.03

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

Fe2O3 + 2H2 → 2Fe + 3H2O

The Language Of Chemistry | Q 4.04

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

Cl2 + 2H2O + SO2 → 4HCl + H2SO4

The Language Of Chemistry | Q 4.05

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

6NaOH + 3Cl2 → 6NaCl + NaClO3 + 3H2O

The Language Of Chemistry | Q 4.06

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

C2H5OH + 3O2 → 2CO2 + 2H2O

The Language Of Chemistry | Q 4.07

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

NaOH + CO2 → Na2CO3 + H2O

The Language Of Chemistry | Q 4.08

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

2H2O + 2Cl2 → 2HCl + O2

The Language Of Chemistry | Q 4.09

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

3CuO + NH3 → 3Cu + 3H2O + N2

The Language Of Chemistry | Q 4.1

Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

PbO2 +4HCl → PbCl2 + H2O + Cl2

The Language Of Chemistry | Q 5

With reference to a chemical equation state which of the statements 1 to 5 pertain to A or B.
A: Information provided by a chemical equation.
B: Limitations of a chemical equation

1. The nature of the individual elements.
2. The speed of the reaction.
3. The state of matter in which the substance is present.
4. The completion of the reaction.
5. The direction of the reaction.

## Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry chapter 1 - The Language Of Chemistry

Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry 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 Class 9 Simplified ICSE Chemistry solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Class 9 Simplified ICSE Chemistry chapter 1 The Language Of Chemistry are Matter (Substance), Molecules, Pure Substances, Elements, Symbols Used to Represent Atoms of Different Elements, Valency, Variable Valency, Chemical Formula or Molecular Formula, Naming Chemical Compounds, To Calculate the Valency from the Formula, Chemical Equation, Balancing Chemical Equation, Atomic Mass, Molecular Mass, Percentage Composition, Empirical and Molecular Formula, Empirical Formula of a Compound, Hydrogen, Ions (Radicals) and Its Types, Chemical Formula or Molecular Formula, Classification of Molecules.

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