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# Selina solutions for Class 8 Chemistry chapter 5 - Language of Chemistry

## Chapter 5: Language of Chemistry

#### Chapter 5: Language of Chemistry solutions [Page 0]

Write the names and symbols of the first twenty elements that you have studied in class VI & VII.

Write the molecular formulae of Copper oxide.

Write the molecular formulae of  Iron (III) chloride

Write the molecular formulae of Sodium hydroxide

Write the molecular formulae of Iron (II) sulphide.

Write the molecular formulae of Lead (II) oxide – PbO.

Write the molecular formulae of Hydrogen nitrate (nitric acid).

Write the molecular formulae of Hydrogen sulphate (sulphuric acid).

Write the molecular formulae of Calcium hydroxide.

Write the molecular formulae of Magnesium carbonate.

Write the molecular formulae of Ammonium carbonate.

Write the molecular formula of the following compounds of Sulphur trioxide.

Find the number and names of elements present in them and calculate their molecular masses.

Write the molecular formula of the following compounds of Iron (II) sulphide and.

Find the number and names of elements present in them and calculate their molecular masses.

Write the molecular formula of the following compounds of Ammonia

Find the number and names of elements present in them and calculate their molecular masses.

#### Chapter 5: Language of Chemistry solutions [Page 0]

Define of Valency.

Define of Molecular formula.

Give the symbols and valencies of following radicals:
(a) Hydroxide (b) Chloride
(c) Carbonate (d) ammonium
(e) Nitrate

Write the molecular formula for the oxide and sulphide of following elements of Sodium.

Write the molecular formula for the oxide and sulphide of following elements of Calcium

Write the molecular formula for the oxide and sulphide of following elements of Hydrogen

Write the molecular formulae for the following compounds and name the elements present of  Baking soda.

Write the molecular formulae for the following compounds and name the elements present of  Common salt.

Write the molecular formulae for the following compounds and name the elements present of Sulphuric acid

Write the molecular formulae for the following compounds and name the elements present of Nitric acid.

The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium chloride.

The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium oxide.

The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium nitride

The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium sulphate.

What is variable valency ? Give two examples of elements showing variable valency.

What is a chemical equation ?

Why it is necessary to balance a chemical equation ?

What are the limitations of a chemical equation ?

State the law of conservation of mass.

Differentiate between:

Reactants and products.

Differentiate between:

A balanced and an unbalanced chemical equation

Balance the following equation:

N_2 +H_2→ NH_3

Balance the following equation:

H_2+O_2→H_2O

Balance the following equation:

Na_2O+H_2O→ NaOH

Balance the following equation:

CO+O_2→CO_2

Balance the following equation:

Zn+HCI→ ZnCI_2+H_2

Write balanced chemical equations for the following word equation:
Iron + Chlorine → Iron (III) chloride

Write balanced chemical equations for the following word equation:

Magnesium + dil sulphuric acid → Magnesium sulphate + water

Write balanced chemical equations for the following word equation:

Magnesium + dil sulphuric acid → Magnesium sulphate + hydrogen gas

Write balanced chemical equations for the following word equation:

Magnesium + oxygen → Magnesium oxide

Write balanced chemical equations for the following word equation:

Calcium oxide + water → Calcium hydroxide

Write balanced chemical equations for the following word equation:

Sodium + chlorine → Sodium chloride

What information do you get from the following chemical equation:
Zn(s) + 2HCl (dil) → ZnCl2 (aq) + H2(g)

#### Chapter 5: Language of Chemistry solutions [Page 0]

Define chemical reaction.

What is a chemical equation ?

Why do we need to balance chemical equation?

State four conditions necessary for a chemical reaction to take place.

Write balanced chemical equations for the reactions represented by word equations in the conditions for a chemical reaction.

Balance the following equation:

Fe +O_2    →   Fe_3 O_4

Balance the following equation:

Fe+ H_2O   →   Fe_3 O_4+H_2

Balance the following equation:

N_2+O_2    →    NO

Balance the following equation:

Pb_3 O_4     →    PbO+O_2

Balance the following equation. Also name the products formed.

NaNO_3→ NaNO_2  +  O_2        Name of product (s)

Balance the following equations Also name the products formed.

K+CI_2→ KCI

Balance the following equation. Also name the products formed.

Ag +S          →   Ag_2 S

Balance the following equation. Also name the products formed.

Mg + O_2         → MgO

Balance the following equation. Also name the products formed.

KCIO_3          →    KCI +O_2

Balance the following equation. Also name the products formed.

H_2O_2     →   H_2O +O_2

Balance the following equation. Also name the products formed.

H_2 + CI_2     →   HCI

Balance the following equation. Also name the products formed.

Na + H_2 O   → Na OH + H_2

Balance the following equation. Also name the products formed.

CO + O_2      → CO_2

Balance the following equation. Also name the products formed.

Zn+ HCI   →  ZnCI _2 + H_2

Balance the following equation. Also name the products formed.

K_2 O +  H_2 O  →  KOH

Balance the following equation. Also name the products formed.

CO _2 + C    →   CO

Balance the following equation. Also name the products formed.

N_2 + H_2    →  NH_3

Balance the following equation. Also name the products formed.

PbCO _3   →  PbO +CO_2

Balance the following equation. Also name the products formed.

FeCI_2 + CI_2  →  Fe CI_3

State what you would observe when the following substance  are heated in a glass test tube:

State what you would observe when the following substances are heated in a glass test tube:
Copper (II) carbonate

Explain the following reaction with one suitable example .
Combination reactions

Explain the following reaction with one suitable example .
Decomposition reaction

Explain the following reaction with one suitable example .
Displacement reaction

Explain the following reaction with one suitable example .
Double decomposition reaction.

Name the type of chemical reaction shown by the following equation:

CaCO_3 → CaO + CO_2

Name the type of chemical reaction shown by the following equation:

2Mg+ O_2 →  2MgO

Name the type of chemical reaction shown by the following equation:

Fe + CuSO_4 → FeSO_4 +Cu

Name the type of chemical reaction shown by the following equation:

NaOH + HCI → NaCI + H_2 O

Name the type of chemical reaction shown by the following equation:

Fe_2 O_3+ 2AI → AI_2 O_3 +2Fe

Write your observations and name the product when
Zinc reacts with dilute hydrochloric acid.

Write your observations and name the product when

Iron nails are added to an aqueous solution of copper sulphate.

Write your observations and name the product when

An aqueous solution of barium chloride is added to dilute sulphuric acid.

A solution of a substance ‘X’ is used for white washing.
(a) Name the substance ‘X’ and write its formula.
(b) Write the reaction of the substance ‘X’ named in (a) above with water.

## Selina solutions for Class 8 Chemistry chapter 5 - Language of Chemistry

Selina solutions for Class 8 Chemistry chapter 5 (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 Selina Concise Chemistry - Middle School for Class 8 (2018-19 Session) solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com are providing such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8 Chemistry chapter 5 Language of Chemistry are Symbols of Elements, Formulae of Compounds, Balancing Simple Equations, Relate the Law to the Balancing of Simple Equations, Information Gathered from a Chemical Equation, Limitations of a Chemical Equation:Catalyst, Conditions, Language of Chemistry - Law of Conservation of Mass, Concept for Language of Chemistry.

Using Selina Class 8 solutions 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 8 prefer Selina Textbook Solutions to score more in exam.

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