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# Selina solutions for Concise Chemistry Class 10 ICSE chapter 9 - Study of Compounds - Ammonia [Latest edition]

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## Chapter 9: Study of Compounds - Ammonia

Intext QuestionsExercise - 9

#### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 9 Study of Compounds - Ammonia Exercise Intext Questions [Page 155]

Intext Questions | Q 1.1 | Page 155

State the type of bonding present in ammonia, show by a diagram?

Intext Questions | Q 1.2 | Page 155

What is the formula for liquid ammonia? Account for the basic nature of this compound.

Intext Questions | Q 2.1 | Page 155

Write a balanced chemical equation for the lab preparation of ammonia.

Intext Questions | Q 2.2 | Page 155

How is ammonia dried and collected in the laboratory?

Intext Questions | Q 2.3 | Page 155

Ammonia cannot be collected over water. Give reason.

Intext Questions | Q 3.1 | Page 155

Explain with a diagram of the preparation of aqueous ammonia.

Intext Questions | Q 3.2 | Page 155

Why drying agents such as P2O5 and CaCl2 are not used to dry NH?

Intext Questions | Q 4 | Page 155

A substance 'A' was heated with slaked lime and a gas 'B' with the pungent smell was obtained. Name the substances A and B and give a balanced equation.

Intext Questions | Q 5.1 | Page 155

Ammonia is manufactured by Haber Process.

Under what conditions do the reactants combine to form ammonia? Give a balanced equation for the reaction.

Intext Questions | Q 5.2 | Page 155

Ammonia is manufactured by Haber Process.

In what ratio by volume, are the above gases used?

Intext Questions | Q 5.3 | Page 155

Ammonia is manufactured by Haber Process.

State one possible source of each reactant used in Haber process.

Intext Questions | Q 5.4 | Page 155

Ammonia is manufactured by Haber Process.

State whether the formation of ammonia is promoted by the use of high pressure or low pressure?

Intext Questions | Q 5.5 | Page 155

Ammonia is manufactured by Haber Process.

Mention two possible ways by which ammonia produced is removed from unchanged gases.

Intext Questions | Q 5.6 | Page 155

Ammonia is manufactured by Haber Process.

What is the function of:

(i) Finely divided iron

(ii) Molybdenum in the above process

Intext Questions | Q 5.7 | Page 155

Ammonia is manufactured by Haber Process.

What is the percentage formation of ammonia?

Intext Questions | Q 5.8 | Page 155

Ammonia is manufactured by Haber Process.

How can this percentage formation be increased?

Intext Questions | Q 6.1 | Page 155

Give reason:

Ammonium compounds do not occur as minerals.

Intext Questions | Q 6.2 | Page 155

Give reason:

Ammonium nitrate is not used in the preparation of ammonia.

Intext Questions | Q 6.3 | Page 155

Give reason:

Conc. H2SO4 is a good drying agent, yet it is not used to dry NH3.

Intext Questions | Q 6.4 | Page 155

Give reason:

In the lab. preparation of ammonia

(i) calcium hydroxide is used in excess

(ii) a flask is fitted in slanting position

Intext Questions | Q 7 | Page 155

State the following conditions required in the Habers process:

1. Temperature
2. Pressure
3. Catalyst
Intext Questions | Q 8.1 | Page 155

Choose the correct word or phrase from the bracket to complete the following sentence and write balanced equation for the same.
ammonium chloride is a soluble salt prepared by ……………….

• precipitation

• neutralization

Intext Questions | Q 8.2 | Page 155

Choose the correct word or phrase from the bracket to complete the following sentence and write a balanced equation for the same.
when ammonium chloride is heated, it undergoes ……………..

• thermal decomposition

• dissociation

Intext Questions | Q 8.3 | Page 155

Choose the correct word or phrase from the bracket to complete the following sentence and write a balanced equation for the same.
Heating ammonium chloride with sodium hydroxide produces ………….

• ammonia

• nitrogen

Intext Questions | Q 9 | Page 155

An element has 2 electrons in its N shell. It reacts with a non-metal of atomic number 7. The compound formed reacts with warm water and produces a basic gas. Identify the elements and write a balanced chemical reaction.

Intext Questions | Q 10 | Page 155

The following reactions are carried out:
A: Nitrogen + metal → compound X.
B: X + water → ammonia + another compound
C: Ammonia + metal oxide → metal + water + N2
One metal that can be used for reaction A is magnesium.
(a) write the formula of the compound X formed
(b) write the correct balanced equation for reaction B where X is the compound formed.
(c) what property of ammonia is demonstrated by reaction C?

Intext Questions | Q 11.1 | Page 155

Correct the following:

A reddish brown precipitate is obtained when ammonium hydroxide is added to ferrous sulphate.

Intext Questions | Q 11.2 | Page 155

Correct the following:
Liquid ammonia is a solution of NH3

Intext Questions | Q 11.3 | Page 155

Correct the following:
Finely divided platinum is used in Haber process

Intext Questions | Q 11.4 | Page 155

Correct the following:
Conc. H2SO4 is a drying agent for NH3

Intext Questions | Q 11.5 | Page 155

Correct the following:
Ammonium salts, on heating, decompose to give ammonia.

Intext Questions | Q 12 | Page 155

Choose the correct answer:
Ammonia can be obtained by adding water to:

• Ammonium chloride

• Ammonium nitrite

• Magnesium nitride

• Magnesium nitrate

#### Selina solutions for Concise Chemistry Class 10 ICSE Chapter 9 Study of Compounds - Ammonia Exercise Exercise - 9 [Pages 160 - 161]

Exercise - 9 | Q 1.1 | Page 160

Is ammonia more dense or less dense than air?

Exercise - 9 | Q 1.2 | Page 160

What property of ammonia is demonstrated by the fountain experiment?

Exercise - 9 | Q 1.3 | Page 160

Write the balanced equation for the reaction between ammonia and sulphuric acid.

Exercise - 9 | Q 2.1 | Page 160

Pick the odd member from the list and give reason:
Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide.

Exercise - 9 | Q 2.2 | Page 160

Pick the odd member from the list and give reason:
Copper oxide, aluminium oxide, sodium oxide, magnesium oxide.

Exercise - 9 | Q 3.1 | Page 160

Give reason for the Liquid ammonia is used as a refrigerant in ice plants.

Exercise - 9 | Q 3.2 | Page 160

Give the reason for Aqueous solution of ammonia is used for removing grease stains from woolen clothes

Exercise - 9 | Q 3.3 | Page 160

Give reason for Aqueous solution of ammonia gives a pungent smell.

Exercise - 9 | Q 3.4 | Page 160

Give reasons for Aqueous solution of ammonia conducts electricity.

Exercise - 9 | Q 4 | Page 160

A gas 'P' gives dense white fumes with chlorine. Its aqueous solution gives a blue colour with copper (II) hydroxide. Give the name and formula of the gas P.

Exercise - 9 | Q 5 | Page 160

Ammonia solution in water gives a blue precipitate when it combines with a solution of copper salt. The blue precipitate further dissolves in excess of an ammonia solution to give the azure blue solution. Explain with the equation.

Exercise - 9 | Q 6 | Page 160

Give the chemical equation (s) to prove that NH3 contains nitrogen and hydrogen.

Exercise - 9 | Q 7 | Page 160

Copy and complete the following equations:

(a) AlN + H2O →

(b) 2NH3 + 3PbO →

(c) NH3 +3Cl2

(d) NH3 + CO2

(i) Which property of ammonia is illustrated by equation (c)?

(ii) What important fertilizer is prepared from equation (d)? State the conditions

Exercise - 9 | Q 8.1 | Page 160

What do you observe when ammonium hydroxide is added to the aqueous solution of FeSO4

Exercise - 9 | Q 8.2 | Page 160

What do you observe when ammonium hydroxide is added to the aqueous solution of Iron (III) chloride.

Exercise - 9 | Q 8.3 | Page 160

What do you observe when ammonium hydroxide is added to the aqueous solution of Lead nitrate.

Exercise - 9 | Q 8.4 | Page 160

What do you observe when ammonium hydroxide is added to the aqueous solution of Zinc nitrate.

Exercise - 9 | Q 9.1 | Page 160

Distinguish between the following (using ammonia solution) Ammonium chloride and sodium chloride.

Exercise - 9 | Q 9.2 | Page 160

Distinguish between the following (using ammonia solution) Ferric salt and ferrous salt.

Exercise - 9 | Q 9.3 | Page 160

Distinguish between the following (using ammonia solution) Sodium sulphate and ammonium sulphate.

Exercise - 9 | Q 10.1 | Page 161

Give balanced equation for the following conversation:
Ammonia to nitrogen using an acidic gas.

Exercise - 9 | Q 10.2 | Page 161

Give balanced equation for the following conversation:
Ammonia to brown gas.

Exercise - 9 | Q 10.3 | Page 161

Give balanced equation for the following conversation:
Ammonia to nitrogen trichloride.

Exercise - 9 | Q 10.4 | Page 161

Give balanced equation for the following conversation:
Ammonia solution to an amphoteric hydroxide.

Exercise - 9 | Q 10.5 | Page 161

Give balanced equation for the following conversation:
A nitride of a trivalent metal to ammonia.

Exercise - 9 | Q 10.6 | Page 161

Give balanced equation for the following conversation:

Exercise - 9 | Q 11.01 | Page 161

Name the gas which is prepared by Haber's process.

Exercise - 9 | Q 11.02 | Page 161

Name two gases which give dense white fumes with ammonia.

Exercise - 9 | Q 11.03 | Page 161

Name one salt of ammonia in each case which is used in: (i) dry cell (ii) explosive (iii) medicine.

Exercise - 9 | Q 11.04 | Page 161

Name an acidic gas which reacts with a basic gas liberating a neutral gas.

Exercise - 9 | Q 11.05 | Page 161

Name a metallic chloride soluble in ammonium hydroxide.

Exercise - 9 | Q 11.06 | Page 161

Name the gas obtained when ammonia burns in an atmosphere of oxygen without any catalyst.

Exercise - 9 | Q 11.07 | Page 161

Name a nitride of a divalent metal which reacts with warm water liberating ammonia.

Exercise - 9 | Q 11.08 | Page 161

Name an amphoteric oxide reduced by the basic gas.

Exercise - 9 | Q 11.09 | Page 161

Name a white salt produced by an acid gas and a basic gas.

Exercise - 9 | Q 12 | Page 161

When ammonium hydroxide is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. What is the cation [positive ion] present in solution B? what is the probable colour of solution B.

Exercise - 9 | Q 13 | Page 161

When an ammonium salt is warmed with a sodium hydroxide solution, a gas is evolved. State three ways in which you can identify this gas.

Exercise - 9 | Q 14 | Page 161

A gas ‘A’ reacts with another gas ‘B’ in the presence of a catalyst to give a colourless gas ‘C’. The gas ‘C’ when comes in contact with air produces a brown gas ‘D’. The solution of ‘A’ in water turns red litmus blue. Explain the observations.

Exercise - 9 | Q 15.1 | Page 161

Name the common refrigerant. How does it deplete the ozone layer?

Exercise - 9 | Q 15.2 | Page 161

What is the alternative of chlorofluoro carbon?

Exercise - 9 | Q 15.3 | Page 161

State the advantages and disadvantages of using ammonia as a refrigerant?

Exercise - 9 | Q 16.1 | Page 161

Name a compound prepared by ammonia and is used as Explosive.

Exercise - 9 | Q 16.2 | Page 161

Name a compound prepared by ammonia and is used as fertilizers.

Exercise - 9 | Q 16.3 | Page 161

Name a compound prepared by ammonia and is used as Medicine.

Exercise - 9 | Q 16.4 | Page 161

Name a compound prepared by ammonia and is used as laboratory reagent.

Exercise - 9 | Q 17.1 | Page 161

Write the equation for the action of heat on Ammonium chloride.
State whether the reaction is an example of thermal decomposition or thermal dissociation.

Exercise - 9 | Q 17.2 | Page 161

Write the equation for the action of heat on Ammonium nitrate.
State whether the reaction is an example of thermal decomposition or thermal dissociation.

Exercise - 9 | Q 18 | Page 161

(a) Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water?

(b) Name the other ion formed when ammonia dissolves in water.

(c) Give one test that can be used to detect the presence of the ion produced in (b).

Exercise - 9 | Q 19 | Page 161

(a) Of the two gases, ammonia and hydrogen chloride, which is more dense? Name the method of collection of this gas.

(b) Give one example of a reaction between the above two gases which produce a solid compound.

(c) Write the balanced equation for a reaction in which ammonia is oxidized by:

(i) A metal oxide

(ii) a gas which is not oxygen

Exercise - 9 | Q 20 | Page 161

Study the flow chart given and give balanced equations to represents the reactions A, B and C:
$\ce{Mg3N2 ->[A]NH3⇌[B][C]NH4Cl}$

Exercise - 9 | Q 21.1 | Page 161

Fill in the blank From the correct choices give below :
Ammonia reacts with excess chlorine to form __________

• nitrogen

• nitrogen trichloride

• ammonium chloride

Exercise - 9 | Q 21.2 | Page 161

Give a balanced equation: Ammonium hydroxide is added to ferrous sulphate solution.

Exercise - 9 | Q 21.3 | Page 161

Write observations: Ammonia gas is passed over heated copper (ll) oxide.

## Chapter 9: Study of Compounds - Ammonia

Intext QuestionsExercise - 9

## Selina solutions for Concise Chemistry Class 10 ICSE chapter 9 - Study of Compounds - Ammonia

Selina solutions for Concise Chemistry Class 10 ICSE chapter 9 (Study of Compounds - Ammonia) 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 9 Study of Compounds - Ammonia are Catalytic Oxidation of Ammonia as the Source of Nitric Acid, Ammonia - Uses of Ammonia, Burning of Ammonia in Oxygen, Ammonia - Reactions with Hydrogen Chloride and with Hot Copper (Ii) Oxide and Chlorine, Aqueous Solution of Ammonia, Ammonia - Density and Solubility of Ammonia (Fountain Experiment), Ammonia - Manufacture by Haber’s Process;, Ammonia - Laboratory Preparation, Concept of Ammonia, Properties of Ammonia.

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