Lakhmir Singh solutions for केमिस्ट्री [अंग्रेजी] कक्षा १० आईसीएसई chapter 9 - Study of Compounds: Ammonia [Latest edition]

State whether the following statement is True or False.

Ammonia is highly soluble in water.

State whether the following statement is True or False.

The molecular formula of ammonia is NH₂.

State whether the following statement is True or False.

In ammonia, the nitrogen atom has a lone pair of electrons.

State whether the following statement is True or False.

Ammonia can be liquefied at high pressure.

When excess of ammonia is treated with chlorine, the gas evolved is ______.

Calcium hydroxide when reacts with ammonium chloride, gas evolved is ______.

2NH₃ + H₂SO₄ → ______

The chemical formula of muriatic acid is ______.

Ammonia is dried over which of the following compounds?

Among the following compounds, which one does not give ammonia with water?

Give reasons for the statement.

Compounds of ammonia do not occur as minerals.

Give reasons:

Ammonium nitrate is not used in the preparation of ammonia.

Give reasons:

Conc. H₂SO₄ is a good drying agent, yet it is not used to dry NH_3.

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.

Write a balanced chemical equation for the following:

Laboratory preparation of ammonia from ammonium chloride.

How is ammonia dried and collected in the laboratory?

State whether the following statement is True or False.

Ammonium sulphate salt on heating gives rise to ammonia.

State whether the following statement is True or False.

Ammonia gas is collected by downward displacement of air.

State whether the following statement is True or False.

Ammonia gas can be prepared by metal nitrides.

State whether the following statement is True or False.

Preparation of ammonia by Haber process is an endothermic process.

Ammonia and ammonium compounds do not occur as minerals because they are highly ______.

On heating, ammonium sulphate salt with sodium hydroxide the gas evolved is ______.

When ammonia reacts with sulphuric acid, the product formed is ______.

NH₄NO₂ on heating gives _______ and water.

Ammonia was initially called ______.

Which scientist studied the chemical composition of ammonia in 1785?

An aqueous solution of ammonia NH₃ is called ______.

What is the molecular weight of ammonia?

What are the boiling and melting points of ammonia, respectively?

Give reasons for the following:

Aqueous solution of ammonia is used for removing grease stains from woollen clothes.

How can ammonia be decomposed forming nitrogen and hydrogen?

Describe the industrial preparation method of ammonia, with a labelled diagram.

Explain why and how chlorofluorocarbons are responsible for the depletion of the ozone layer?

Explain the purpose of the fountain experiment with a labelled diagram.

As we studied that chlorofluorocarbons are harmful to the environment, as they deplete the ozone layer. Nowadays CFCs are being replaced by HCFCs, which are comparatively less harmful towards the environment. Make a PowerPoint Presentation about the timeline of discovery and usage of various refrigerants starting from ammonia. Discuss the beneficial and harmful effects (if any) of using these refrigerants and why the new refrigerants replaced the old ones in a wide range of applications.

True or False.

In an exothermic reaction, heat is evolved.

True or False.

To get dry ammonia, the gas is passed through conc. H₂SO₄.

True or False.

Ammonia gas is heavier than air.

True or False.

Ammonia gas being soluble in water, it is not collected over water.

True or False.

The possibility of back suction is due to the high solubility of ammonia.

NH₄NO₃ \[\ce{->[\Delta]}\] ______ + 2H₂O

Mg₃N₂ + 6H₂O → 3Mg(OH)₂ + ______↑

The rate of conversion of reacting gases into ammonia by Haber's process is ______.

Ammonia gas condenses easily because the boiling point of ammonia is ______ as compared to N₂ and Н₂.

Ammonia gas is ______ soluble in water as compared to N₂ and O₂.

Formation of ammonia requires ______ temperature.

Four volumes of reactants produce ______ volumes of ammonia.

A promoter is used to ______ the efficiency of the catalyst.

Aqueous solution of ammonia consists of ______.

A basic hydride of nitrogen is ______.

On passing ammonia over heated copper oxide, the gas evolved is ______.

When ammonia is passed through Nessler's solution the precipitate obtained is ______.

Ammonia can be collected by ______.

The catalyst used in the Haber's process for the manufacture of ammonia is ______.

Ammonia can be obtained by adding water to ______.

Match the column I with column II and write the correct answer.

An aqueous solution of ammonia is ______.

Explain why ammonia is considered as a lewis base?

Give reason why ammonia is good refrigerant?

Write a balanced equation for a reaction in which ammonia is oxidized by:

A metal oxide

Write a balanced chemical equation for a reaction in which ammonia is oxidised by the following:

A gas which is not oxygen.

A gas ‘P’ gives dense white fumes with chlorine. Its aqueous solution gives a blue colour with copper (II) hydroxide.

1. Name the gas P.
2. Give its formula.
3. Give three uses of P.

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.

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

Write the equation for the reaction:

Aluminium nitride and Water.

By taking the example of metal oxide, explain the reducing nature of ammonia. Give the chemical equation for the reaction.

Answer the following.

What is the action of chlorine on Excess NH₃.

How do you explain that ammonia is not a supporter of combustion and contains nitrogen and hydrogen?

What do understand by catalytic oxidation? Explain it with an example.

How will you test ammonia gas?

How will you test ammonium ion?

Explain with a diagram the preparation of aqueous ammonia.

1. Of the two gases, ammonia and hydrogen chloride, which is more denser? Name the method of collection of this gas.
2. Give one example of a reaction between the above two gases which produces a solid compound.

Copy and complete the following table relating to important industrial process:

Give a balanced chemical equation for the following:

Lab. preparation of ammonia using an ammonium salt.

Give a balanced chemical equation for the following:

Reaction of ammonia with excess of chlorine.

Give a balanced chemical equation for the following:

Reaction of ammonia with sulphuric acid.

The diagram shows a simple arrangement of the fountain experiment:

(i) Name the two gases you have studied which can be used in this experiment

(ii) What is the common properly demonstrated by this experiment

Name the gas evolved when the following mixtures are heated.

Calcium hydroxide and ammonium chloride.

Name the gas evolved when the following mixtures are heated.

Sodium nitrite and ammonium chloride.

Write a balanced chemical equation for the following:

When an excess of ammonia is treated with chlorine.

Write a balanced chemical equation for the following:

An equation to illustrate the reducing nature of ammonia.

Write the balanced chemical equation to prepare ammonia gas in the laboratory by using an alkali.

State why concentrated sulphuric acid is not used for drying ammonia gas.

Why is ammonia gas not collected over water?

Study the flow chart given and give balanced equations to represent the reactions A, B and C:

\[\ce{Mg3N2 ->[A] NH3 <=>[B][C] NH4Cl}\]

Name the substance used for drying ammonia.

Write an equation to illustrate the reducing nature of ammonia.

With reference to Haber's process for the preparation of ammonia, write the equation and the conditions required.

The questions below are related to the manufacture of ammonia.

1. Name the process.
2. In what ratio must the reactants be taken?
3. Name the catalyst used.
4. Give the equation for the manufacture of ammonia.
5. Ammonia can act as a reducing agent; write a relevant equation for such a reaction.

The diagram shows an experimental set up for the laboratory preparation of a pungent smelling gas. The gas is alkaline in nature.

1. Nature the gas collected in the jar.
2. Write the balance equation for the above preparation.
3. How is the gas being collected?
4. Name the drying agent used.
5. How will you find that the jar is full of gas?

Explain the following:

Ammonium nitrate is not used in the laboratory preparation of NH₃.

State a relevant reason for the following:

Ammonia gas is not collected over water.