S.P. Singh solutions for Concise Chemistry [English] Class 10 ICSE chapter 11 - Sulphuric Acid [2017 edition]

Comment, sulphuric acid is referred to as King of chemicals.

Comment, sulphuric acid is referred to as oil of vitriol.

Sulphuric acid is manufactured by the contact process.

Give two balanced equations to obtain SO₂ in this process.

Sulphuric acid is manufactured by the contact process.

Give the conditions for the oxidation of SO₂.

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.

Why the impurity of arsenic oxide must be removed before passing the mixture of SO₂ and air through the catalytic chamber?

1. Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C.
2. In the contact process for the manufacture of sulphuric acid, sulphur trioxide is not converted to sulphuric acid by reacting it with water. Instead a two-step procedure is used. Write the equations for the two steps involved in D.
3. What type of substance will liberate sulphur dioxide from sodium sulphite in step E?
4. Write the equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F.

Why is water not added to concentrated H₂SO₄ in order to dilute it?

Give two balanced reactions of the type to show the following property of sulphuric acid:

Acidic nature

Give two balanced reactions of the type to show the following property of sulphuric acid:

Oxidising agent

Give two balanced reactions of the type to show the following property of sulphuric acid:

Dehydrating nature

Give two balanced reactions of the type to show the following property of sulphuric acid:

Non-volatile nature

Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid (using lead nitrate solution).

Give a chemical test to distinguish between dilute sulphuric acid and conc. sulphuric acid.

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.

Why is concentrated sulphuric acid kept in air tight bottles?

Why is H₂SO₄ is not used as a drying agent for H₂S?

Why is sulphuric acid used in the preparation of HCl and HNO₃? Give equations in both cases.

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

In the production of HCl gas when it reacts with chloride.

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

In the preparation of CO and HCOOH.

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

As a source of hydrogen by diluting it and adding a strip of magnesium.

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

In the preparation of sulphur dioxide by warming a mixture of conc. sulphuric acid and copper turnings.

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

Hydrogen chloride gas is passed through concentrated sulphuric acid.

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.

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 carbon.

What is the name given to the salts of sulphurous acid?

What is the name given to the salts of sulphuric acid?

Give reasons for the following:

Sulphuric acid forms two types of salts with NaOH.

Give reasons for the following:

A piece of wood becomes black when concentrated sulphuric acid is poured on it.

Give reasons for the following:

Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.

Copy and complete the following table:

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

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

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

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

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

\[\ce{Carbonate/hydrogen carbonate + Acid ->  \underline{\phantom{.......}} + \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]

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

\[\ce{Sulphite/hydrogen sulphite + Acid ->  \underline{\phantom{.......}} + \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]

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

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

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.

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. \[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]

Name the acid formed when sulphur dioxide dissolves in water.

Name the gas released when sodium carbonate is added to a solution of sulphur dioxide.