Selina solutions for Concise Chemistry [English] Class 10 ICSE chapter 9 - Study of Compounds B - Ammonia [1990 edition]

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

What is the formula for liquid ammonia? 

Account for the basic nature of liquid ammonia compound.

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

How is ammonia dried and collected in the laboratory?

Ammonia cannot be collected over water. Give reason.

Explain with a diagram the preparation of aqueous ammonia.

Why drying agents such as \[\ce{P2O5}\] and \[\ce{CaCl2}\] are not used to dry \[\ce{NH3}\]?

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.

Ammonia is manufactured by Haber Process.

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

Ammonia is manufactured by Haber Process.

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

Ammonia is manufactured by Haber Process.

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

Ammonia is manufactured by Haber Process.

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

Ammonia is manufactured by Haber Process.

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

Ammonia is manufactured by Haber Process.

What is the function of finely divided iron?

Ammonia is manufactured by Haber Process.

What is the function of molybdenum in the above process?

Ammonia is manufactured by Haber Process.

What is the percentage formation of ammonia?

Ammonia is manufactured by Haber Process.

How can this percentage formation be increased?

Give reasons:

Ammonium compounds do not occur as minerals.

Give reasons:

Ammonium nitrate is not used in the preparation of ammonia.

Give reasons:

Conc. \[\ce{H2SO4}\] is a good drying agent, yet it is not used to dry \[\ce{NH3}\]_.

Give reasons:

In the lab. preparation of ammonia calcium hydroxide is used in excess.

Give reasons:

In the lab. preparation of ammonia flask is fitted in slanting position.

State the following condition required in the Habers process:

Temperature

State the following condition required in the Habers process:

Pressure

State the following condition required in the Habers process:

Catalyst

Choose the correct word or phrase from the options to complete the following sentence and write balanced equation for the same.

Ammonium chloride is a soluble salt prepared by ______.

Choose the correct word or phrase from the options to complete the following sentence and write balanced equation for the same.

When ammonium chloride is heated, it undergoes ______.

Choose the correct word or phrase from the options to complete the following sentence and write balanced equation for the same.

Heating ammonium chloride with sodium hydroxide produces ______.

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.

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.

1. Write the formula of the compound X formed.
2. Write the correctly balanced equation for reaction B where X is the compound formed.
3. What property of ammonia is demonstrated by reaction C?

Correct the following:

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

Correct the following:

Liquid ammonia is a solution of \[\ce{NH3}\].

Correct the following:

Finely divided platinum is used in Haber process

Correct the following:

Conc. \[\ce{H2SO4}\] is a drying agent for \[\ce{NH3}\].

Correct the following:

Ammonium salts, on heating, decompose to give ammonia.

Choose the correct answer:

Ammonia can be obtained by adding water to ______.

Is ammonia more dense or less dense than air?

What property of ammonia is demonstrated by the fountain experiment?

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

Pick the odd member from the list giving reasons:

Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide.

Pick the odd member from the list giving reasons:

Copper oxide, aluminium oxide, sodium oxide, magnesium oxide.

Give reasons for the following:

Liquid ammonia is used as a refrigerant in ice plants.

Give the reason for the following:

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

Give reasons for the following:

Aqueous solution of ammonia gives a pungent smell.

Give reasons for the following:

Aqueous solution of ammonia conducts electricity.

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.

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 \[\ce{NH3}\] contains nitrogen and hydrogen.

Copy and complete the following equations:

1. AlN + H₂O →
2. 2NH₃ + 3PbO →
3. NH₃ +3Cl₂ →
4. NH₃ + CO₂ →
   1. Which property of ammonia is illustrated by equation (c)?
   2. What important fertiliser is prepared from equation (d)? State the conditions.

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

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

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

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

Distinguish between the following (using ammonia solution):

Calcium chloride and zinc chloride.

Distinguish between the following (using ammonia solution):

Ferric salt and ferrous salt.

Distinguish between the following (using ammonia solution):

Zinc nitrate and lead nitrate.

Give balanced equation for the following conversion:

Ammonia to nitrogen using an acidic gas.

Give balanced equation for the following conversion:

Ammonia to brown gas.

Give balanced equation for the following conversion:

Ammonia to nitrogen trichloride.

Give balanced equation for the following conversion:

Ammonia solution to an amphoteric hydroxide.

Give balanced equation for the following conversion:

A nitride of a trivalent metal to ammonia.

Give balanced equation for the following conversion:

Lead oxide to lead.

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

Name two gases which give dense white fumes with ammonia.

Name one salt of ammonia in case which is used in dry cell.

Name one salt of ammonia in case which is used in explosives.

Name one salt of ammonia in case which is used in medicine.

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

Name a metallic chloride soluble in ammonium hydroxide.

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

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

Name an amphoteric oxide reduced by the basic gas.

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

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.

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

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.

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

What is the alternative of chlorofluoro carbon?

State the advantages of using ammonia as a refrigerent?

State the disadvantages of using ammonia as refrigerent?

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

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

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

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

Write the equation for the action of heat on Ammonium chloride.

State whether the reaction is an example of thermal decomposition or thermal dissociation.

Write the equation for the action of heat on Ammonium nitrate.

State whether the reaction is an example of thermal decomposition or thermal dissociation.

1. Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water?
2. Name the other ion formed when ammonia dissolves in water.
3. Give one test that can be used to detect the presence of the ion produced in (b).

1. Of the two gases, ammonia and hydrogen chloride, which is more dense? Name the method of collection of this gas.
2. Give one example of a reaction between the above two gases which produce a solid compound.
3. Write the balanced equation for a reaction in which ammonia is oxidized by:
   1. A metal oxide
   2. a gas which is not oxygen

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

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

Ammonia reacts with excess chlorine to form ______.

Give a balanced equation:

Ammonium hydroxide is added to ferrous sulphate solution.

Write observations:

Ammonia gas is passed over heated copper (II) oxide.

Name the gas evolved in each case [formula is not acceptable]. The gas that burns in oxygen with a green flame.

Write a fully balanced equation for magnesium nitride is treated with warm water.

Identify the substance 'Q' based on the information given:

The white crystalline solid 'Q' is soluble in water. It liberates a pungent smelling gas when heated with sodium hydroxide solution.

From the list given below, select the word (s) required complete the blanks (i) to (v) in the following passage :
Note : words chosen from the list are to be used only once. Write only the answers. Do not copy the passage
 [reddish brown, ammonium, nitrogen dioxide, hydroxyl, dirty green, ammonia, acidic, alkaline]
Nitrogen and hydrogen combine in the presence of a catalyst to give (i) ______ gas. When the above mentioned gas is passed through water it forms a solution which will be (ii) ______ in nature and the solution contains (iii) ______ ions and (iv) ______ ions. The above solution when added to iron (II) sulphate solution gives a (v) ______ coloured precipitate of iron (II) hydroxide.

State your observation when, in the absence of catalyst, ammonia is burnt in an atmosphere of oxygen.

Give the equation for the reaction:

Ammonium chloride is heated with sodium hydroxide.

In the manufacture of ammonia

1. Name the process.
2. State the ratio of the reactants taken.
3. State the catalyst used.
4. Give the equation for the manufacture of the gas - ammonia.

Write a relevant equation to show that ammonia acts as a reducing agent.

Name two gases which can be used to study the fountain experiment.

State the common property demonstrated by the fountain experiment.

What would you observe in the following cases:

Ammonium hydroxide is first added in a small quantity and then in excess to a solution of copper sulphate.

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?

Write a balanced chemical equation:

Chlorine reacts with excess of ammonia.

State your observation:

Water is added to the product formed, when Al is burnt in a jar of nitrogen gas.

Name the gas produced when excess ammonia reacts with chlorine.

Rewrite the correct statement with the missing word/s:

Magnesium nitride reacts with water to liberate ammonia.

Give a balanced equation for the reaction:

Ammonia and oxygen in the presence of a catalyst.

Explain the following:

Ammonium nitrate is not used in the laboratory preparation of \[\ce{NH3}\].

State a relevant reason for the following:

Ammonia gas is not collected over water.

State one appropriate observation for excess of chlorine gas is reacted with ammonia gas.

Nitrogen gas can be obtained by heating ______.

State two relevant observations of the following:

Ammonium hydroxide solution is added to zinc nitrate solution in minimum quantities and then in excess

Give a balanced equation for the reduction of hot copper (II) oxide to copper using ammonia gas.

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

Identify an alkaline gas which produces dense white fumes when reacted with \[\ce{HCl}\] gas.

Ammonia gas is collected by ______.

Write balanced equations for action of warm water on magnesium nitride

Distinguish between the given pair of compounds using the test given within brackets:

Iron (II) sulphate and iron (III) sulphate (using ammonium hydroxide)

Distinguish between the following pair of compounds using the test given within bracket.

A lead salt and a zinc salt (using excess ammonium hydroxide)

State your observation of the following case:

When calcium hydroxide is heated with ammonium chloride crystals.

Name the other ion formed when ammonia dissolves in water. Give one test that can be used to detect the presence of the ion produced.

State the conditions required for the given reaction to take place:

Catalytic oxidation of ammonia to nitric oxide

Give balanced chemical equations for each of the following:

 Lab preparation of ammonia using an ammonium salt

Give balanced chemical equations for the following:

Reaction of ammonia with excess chlorine

Give balanced chemical equations for the following:

Reaction of ammonia with sulphuric acid.

From the list of gases - ammonia, ethane, hydrogen chloride, hydrogen sulphide, select the gas which is used as a reducing agent in reducing copper oxide to copper.

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 balanced chemical equation for the following:

When excess of ammonia is treated with chlorine.

Write balanced chemical equations for the following:

An equation to illustrate the reducing nature of ammonia.