Selina solutions for Concise Chemistry [English] Class 10 ICSE chapter 11 - Study of Compounds D - Sulphuric Acid [1990 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 \[\ce{SO2}\] in this process.

Sulphuric acid is manufactured by the contact process.

Give the conditions for the oxidation of \[\ce{SO2}\]

Sulphuric acid is manufactured by the contact process.

Name the catalyst used.

Sulphuric acid is manufactured by the contact process.

Why \[\ce{H2SO4}\] is not obtained by directly reacting \[\ce{SO3}\] with water.

Sulphuric acid is manufactured by the contact process.

Name the chemical used to dissolve \[\ce{SO3}\] and also name the product formed. Give all the main reactions to this process.

Why the impurity of arsenic oxide must be removed before passing the mixture of \[\ce{SO2}\] 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 \[\ce{H2SO4}\] 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 each type to show the following property of sulphuric acid:

Oxidising agent

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

Dehydrating nature

Give two balanced reactions of each 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 following:

Sulphur

Write a balanced chemical equation when hot and concentrated sulphuric acid reacts with the following:

\[\ce{NaOH}\]

Write a balanced chemical equation when hot and concentrated sulphuric acid reacts with the following:

Sugar

Write a balanced chemical equation when hot and concentrated sulphuric acid reacts with the following:

Carbon

Write a balanced chemical equation when hot and concentrated sulphuric acid reacts with the following:

Copper

Why is Concentrated sulphuric acid kept in air tight bottles?

Why is \[\ce{H2SO4}\] is not used as a drying agent for \[\ce{H2S}\]?

Why is sulphuric acid used in the preparation of \[\ce{HCl}\] and \[\ce{HNO3}\]? Give equations in both cases.

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction on the same:

In the production of \[\ce{HCl}\] gas when it reacts with chloride.

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction on the same:

In the preparation of \[\ce{CO}\] and \[\ce{HCOOH}\]

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction on the same:

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

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction on the same:

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

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction in given case:

Hydrogen chloride gas is passed through concentrated sulphuric acid.

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction on the same:

Its reaction with ethanol.

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction on the same:

Its 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 \[\ce{NaOH}\].

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 are the typical properties of dilute acid. Complete them by inserting suitable words:

Active metal + acid → ______ + ______

The following are the typical properties of dilute acid. Complete them by inserting suitable words:

Base + Acid → ______ + ______

The following are the typical properties of dilute acid. Complete them by inserting suitable words:

Carbonate/hydrogen carbonate + Acid → ______ + ______ + ______

The following are the typical properties of dilute acid. Complete them by inserting suitable words:

Sulphite/hydrogen sulphite + Acid → ______ + ______ + ______

The following are the typical properties of dilute acid. Complete them by inserting suitable words:

Sulphide + Acid → ______ + ______

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.

Dilute sulphuric acid will produce a white precipitate when added to a solution of ______.

Identify the following substance:

Liquid E can be dehydrated to produce ethene.

Copy and complete the following table relating to an important industrial process and its final output.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain hydrogen.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain sulphur dioxide.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain carbon dioxide.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain zinc carbonate (two steps required).

What property of conc. \[\ce{H2SO4}\] is used in the action when sugar turns black in its presence?

What is the property of concentrated sulphuric acid which allows it to be used in the preparation of hydrogen chloride and nitric acid?

Write the equations for dil. \[\ce{H2SO4}\] and barium chloride.

Write the equations for dil. \[\ce{H2SO4}\] and sodium sulphide.

Name the gas evolved [formula is not acceptable]. The gas that can be oxidised to sulphur.

Write the equation of the following reaction:

Sulphur is heated with concentrated sulphuric acid

Write the reaction of conc. \[\ce{H2SO4}\] with sugar.

Give a balanced equation for the conversion of zinc oxide to zinc sulphate.

What would you observe in the following case:

Sugar crystals are added to a hard glass test tube containing concentrated sulphuric acid.

The gas evolved when dilute sulphuric acid reacts with iron sulphide. 

Give a balanced equation for the manufacture of sulphuric acid by the contact process.

Write balanced chemical equations for the action of dilute sulphuric acid on sodium sulphite.

State the property of sulphuric acid shown by the reaction of cone. sulphuric acid when heated with potassium nitrate.

Which property of sulphuric acid is shown by the reaction of the concentrated sulphuric acid with Carbon?

State the property of sulphuric acid shown by the reaction of conc. sulphuric acid when heated with ethanol.

Name the gas produced on the reaction of dilute sulphuric acid with a metallic sulphide.

Some properties of sulphuric acid are listed below. Choose the role played by sulphuric acid as A, B, C or D which is responsible for the reactions (i) to (v). Some role/s may be repeated.

1. Dilute acid
2. Dehydrating agent
3. Non-volatile acid
4. Oxidising agent
   1. \[\ce{CuSO4 * 5H2O ->[conc H2SO4] CuSO + 5H2O}\]
   2. \[\ce{S + 2H2SO4 [conc] -> 3SO2 + 2H2O}\]
   3. \[\ce{NaNO3 + \underset{[conc]}{H2SO4} ->[<200^\circ C] NaHSO4 + HNO3}\]
   4. \[\ce{MgO + H2SO4 -> MgSO4 + H2O}\]
   5. \[\ce{Zn + 2H2SO4 [conc] -> ZnSO4 + SO2 + 2H2O}\]

Give a balanced equation for the reaction:

Zinc sulphide and dilute sulphuric acid.

State one appropriate observation when Cone. \[\ce{H2SO4}\] is added to a crystal of hydrated copper sulphate.

In the given equation \[\ce{S + 2H2SO4 -> 3SO2 + 2H2O}\]. Identify the role played by cone. \[\ce{H2SO4}\].

State one appropriate observation of the following:

Dehydration of Concentrated Sulphuric acid with sugar crystals

Identify the substance underlined:

A dilute mineral acid which forms a white precipitate when treated with barium chloride solution.

Write balanced equations for the following:

Action of concentrated sulphuric acid on carbon.

Distinguish between the following pair of compounds using the test given with brackets:

Dilute sulphuric acid and dilute hydrochloric acid (using barium chloride solution)

State the conditions required for the following reactions to take place:

The conversion of sulphur dioxide to sulphur trioxide.

Give one equation to show the following properties of sulphuric acid : Dehydrating property

Give one equation to show the following property of sulphuric acid:

Acidic nature

Give one equation to show the following properties of sulphuric acid:

As a non-volatile acid

In the contact process for the manufacture of sulphuric acid give the equations for the conversion of sulphur trioxide to sulphuric acid.

Give balanced chemical equation for the action of sulphuric acid of the following:

Potassium hydrogen carbonate

Give a balanced chemical equation for the action of sulphuric acid of the following:

Sulphur

Identify the acid in each case:

The acid which produces sugar charcoal from sugar

Identify the acid in the case:

The acid on mixing with lead nitrate solution produces a white precipitate, which is insoluble even on heating.