(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Chemistry

Give reasons:

Ammonium compounds do not occur as minerals.

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 percentage formation of ammonia?

Ammonia is manufactured by Haber Process.

How can this percentage formation be increased?

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.

Sulphuric acid is manufactured by the contact process.

Name the catalyst used.

Sulphuric acid is manufactured by the contact process.

Why H₂SO₄ is not obtained by directly reacting SO₃ with water?

Sulphuric acid is manufactured by the contact process.

Name the chemical used to dissolve SO₃ and also name the product formed. Give all the main reactions to this process.

Sulphuric acid is manufactured by the contact process
Name a gas that can be oxidized to sulphur.

Write a balanced chemical equation:

When hot and concentrated sulphuric acid reacts with the sulphur.

Write a balanced chemical equation:

When hot and concentrated sulphuric acid reacts with the NaOH.

Write a balanced chemical equation:

When hot and concentrated sulphuric acid reacts with the sugar.

Write a balanced chemical equation:

When hot and concentrated sulphuric acid reacts with the carbon.

Write a balanced chemical equation:

When hot and concentrated sulphuric acid reacts with the copper.

What property of conc. H₂SO₄ is made use of in the following case? Give an equation for the reaction in this case:

It’s reaction with ethanol.

Some properties of sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reactions (i) to (v). Some properties may be repeated:

1. Typical acid
2. Dehydrating agent
3. Non-volatile acid
4. Oxidizing agent

1. \[\ce{C12H22O11 + nH2SO4 -> 12C + 11H2O + nH2SO4}\]
2. \[\ce{S + 2H2SO4 -> 3SO2 + 2H2O}\]
3. \[\ce{NaCl + H2SO4 -> NaHSO4 + HCl}\]
4. \[\ce{CuO + H2SO4 -> CuSO4 + H2O}\]
5. \[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]

Which property of sulphuric acid accounts for its use as a dehydrating agent?

Concentrated sulphuric acid is both an oxidizing agent and a non-volatile acid. Write one equation. Each illustrates the above-mentioned properties of sulphuric acid.

The following is the typical property of dilute acid. Complete it by inserting suitable words:

\[\ce{Active metal + Acid ->  \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]