Frank solutions for Chemistry - Part 2 [English] Class 10 ICSE chapter 10 - Study of Sulphur Compound: Sulphuric Acid [Latest edition]

How does sulphuric acid occur in nature?

Describe the theory of manufacture of sulphuric acid by contact process, with all the necessary conditions (No technical details are required but equations should be given for each stage of process).

Define the following term:
Constant boiling mixture

Define the following term : Hygroscopic substance

Define the following term : Oleum

Define the following term : Dehydrating agent

Name the following:
Products obtained by dissolving sulphur dioxide and chlorine in water.

Name the following:
The catalyst used in the constant process.

Name the following:
Solution obtained by dissolving sulphur trioxide in 98% sulphuric acid.

Name the following:
Products obtained by treating zinc with dilute sulphuric acid.

Name the following:
Products obtained by treating ferrous sulphide with dilute sulphuric acid.

Name the following :
The precipitate obtained by treating aqueous lead nitrate with dilute sulphuric acid.

Name the following:
The precipitate obtained by treating aqueous barium chloride with dilute sulphuric acid.

Name the following:
The precipitate obtained by treating carbon with hot concentrated sulphuric acid.

Name the Following:
The property used to prepare HCl and HNO₃ from H₂SO₄.

What would you observe in the following case?
Sulphur trioxide is dissolved in water on a large scale.

What would you observe in the following case?
Concentrated sulphuric acid is added to equal volumes of cold water.

What would you observe in the following case?
100ml of 98% sulphuric acid is kept open.

What would you observe in the following case?
Hot concentrated sulphuric acid is added to sodium chloride crystals.

What would you observe in the following case?
Dilute sulphuric acid is added to ferrous sulphate solution.

Give reason for the following:
In the contact process, sulphur dioxide is dissolved in 98% sulphuric acid and not in water.

Give reason for the following:
When solution of sulphur dioxide is exposed to air, it gets converted to sulphuric acid.

Give reason for the following:
When diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.

Give reason for the following:
When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.

Give reason for the following:
Sulphuric acid can form two kinds of salts with sodium chloride.

Give reason for the following:
When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.

Give reason for the following:
When carbon is heated with concentrated sulphuric acid, carbon dioxide is formed.

Give reason for the following:
Ammonia gas cannot be dried by passing through concentrated sulphuric acid.

Give reason for the following:
When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.

Give reason for the following:
Concentrated sulphuric acid should not be added to oxalic acid or formic acid in the open laboratory.

Give reason for the following:
When concentrated sulphuric acid is added to blue crystalline copper sulphate, it turns powdery white.

Give reason for the following:
Concentrated sulphuric acid must be stored in airtight bottles.

Give reason for the following:
Cotton clothes get burnt with concentrated sulphuric acid.

Give reason for the following:
H₂SO₄ cannot be prepared by heating sodium sulphate with conc. HCl or HNO₃

How are the following conversions brought about? Give equation and condition:
Sulphur trioxide to sulphur acid.

How are the following conversion brought about? Give equation and condition:
Sulphur trioxide to oleum.

How are the following conversion brought about? Give equation and condition:
Dilute sulphuric acid to hydrogen.

How are the following conversion brought about? Give equation and condition:
Aqueous barium chloride to barium sulphate.

How are the following conversion brought about? Give equation and condition:
Aqueous lead nitrate to lead sulphate.

How are the following conversion brought about? Give equation and condition:
Sodium chloride to hydrogen chloride.

How are the following conversion brought about? Give equation and condition:
Sucrose to sugar charcoal.

How are the following conversion brought about? Give equation and condition:
Oxalic acid to carbon monoxide.

Describe the reaction that show
Concentrated sulphuric acid is a non-volatile acid.

Describe the reaction that show
Concentrated sulphuric acid is a dehydrating agent.

Describe the reaction that show
Concentrated sulphuric acid behaves as oxidizing agent.

Describe the reaction that show
Dilute sulphuric acid behaves as dibasic acid.

Why is sulphuric acid known as king of chemicals and oil vitriol ?

The following statement is correct only under certain conditions. Rewrite the statement including the appropriate conditions.
Oxalic acid reacts with sulphuric acid to produce carbon monoxide and carbon dioxide.

Give examples of the use of sulphuric acid as
An electrolyte in everyday use

Give examples of the use of sulphuric acid as
Non-volatile acid

Give examples of the use of sulphuric acid as
An oxidizing agent

How will you distinguish between dilute H₂SO₄ and conc. H₂SO₄ ?

How will you distinguish between conc. HCl and conc. H₂SO₄?

Give main difference between drying agent and dehydrating agent.

Choose the current answer from the options given below :
In the preparation of H₂SO₄ by contact process V₂O₃ is used as a catalyst in the reaction. It is

Choose the current answer from the options given below :
When conc. H₂SO₄ comes in contact with sugar, it becomes black due to

Choose the current answer from the options given below :
Which of the following gas dissolves in H₂SO₄ to give alum?

Choose the current answer from the options given below :
In the contact process, the impurities of arsenic are removed by

Choose the current answer from the options given below :
The catalyst used for the oxidation of SO₂ to SO₃ in contact process is

Fill in the blank with appropriate word/words :
The catalyst used in contact process for the manufacture of H₂SO₄ is ___________ or _________.

Fill in the blank with appropriate word/words :
For the reaction SO₂ + O₂⇌ SO₃ + Heat, the favourable conditions are _________ and __________.

Fill in the blank with appropriate word/words :
Oil of Vitriol is ___________

Give reason for the following:
Concentrated sulphuric acid is kept in airtight bottles.

Name the anion [negative ion] present in the following compound:

Compound D when warmed with dilute H₂SO₄ gives a gas which turns acidified potassium dichromate solution green.

What is the purpose of the contact process?

Name the two gases that are combined during the contact process.

Name the catalyst used in the process.

Write the equation for the reaction between zinc and the final product of the contact process.

Name two other acids other than sulphuric acid, which can be prepared by using sulphuric acid.

In using sulphuric acid to prepare other acids, as mentioned above, which property of sulphuric acid is used ?

Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equation for the reaction from which the folllowing gas are obtained, using dilute sulphuric acid as one of the reactant : Hydrogen

Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equation for the reaction from which the folllowing gas are obtained, using dilute sulphuric acid as one of the reactant : Carbon dioxide

Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equation for the reaction from which the folllowing gas are obtained, using dilute sulphuric acid as one of the reactant : Sulphur dioxide

What would you see, when a crystal of CuSO₄.5H₂O is placed in concentrated sulphuric acid? Give reason to explain your observation.

Write balanced equations for the three chemical reactions that take place during the conversion of sulphur dioxide to sulphuric acid in the contact process. Name the catalyst used in the contact process.

What do you observe when barium chloride solution is added to dilute sulphuric acid ?

Write balanced equation for the reaction between iron and dilute sulphuric acid.

Name the oxide of sulphur which reacts water to give sulphuric acid.
In the contact process, the direct reaction between oxide of sulphur and water is avoided. In this process what does the oxide of sulphur react with instead of water, and what is the name of the product?

Write balanced equation for the reaction of dilute sulphuric acid with the following:
Copper carbonate

Write balanced equation for the reaction of dilute sulphuric acid with the following: 
Lead nitrate solution

Write balanced equation for the reaction of dilute sulphuric acid with the following:
Zinc hydroxide

In this question, you required to supply the word (or words) that will make the sentence correct. Rewrite the copper statement.
Copper sulphate crystals are dehydrate by sulphuric acid.

Write balanced chemical equation for the reaction between zinc and dilute sulphuric acid.
(i) What is the purpose of the contact process ?
(ii) Name the catalyst used in the contact process.
(iii) Write the balanced equation for the reaction in the contact process, which takes place in the presence of catalyst.

What do you see when concentrated sulphuric acid is added to copper sulphate-5-water ( You are not required to say what is happing, nor is it necessary to name the products.) 

Copy and complete the following table.
Column 3 has the names of gases to be prepared using the substance you enter in column 1, along with dilute or concentrated sulphuric acid, as indicated in column 2.

Write the equation for the laboratory preparation of :
(i) Sodium sulphate using dilute sulphuric acid.
(ii) Lead sulphate using dilute sulphuric acid.

Which concentrated acid oxidizes sulphur directly to sulphuric acid ? Write the equation for the same. What is the name of the process by which sulphuric acid is manufactured ? Name the catalyst used in the process.

Complete the following sentence, choosing the correct word from the given options.
"Concentrated sulphuric acid is used in the laboratory preparation of nitric acid and hydrochloric acid because it is ____________ in comparison to these two acids."

Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Iron (II) sulphate from iron.

Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Copper sulphate from copper.

Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Lead sulphate from lead nitrate.

Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Sodium Sulphate from sodium carbonate.

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.

Write balanced equation for potassium hydrogen carbonate and dilute sulphuric acid.

A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C or D), depending on which is relevant to each of the preparations (i) to (ii).
A. Dilute acid (typical acid properties)
B. Non-volatile acid
C. Oxidizing agent
D. Dehydrating agent

(i) Preparation of hydrogen chloride.
(ii) Preparation of ethane from ethanol
(iii) Preparation of copper sulphate from copper oxide.

Name the process used for the large scale manufacture of sulphuric 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 to illustrate the properties of sulphuric acid mentioned above.

Write the balanced chemical equation for the following conversion:
Lead sulphate from lead nitrate solution and dilute sulphuric acid.

Write the balanced chemical equation for the following conversion:
Copper sulphate from copper and concentrated sulphuric acid.

Write the balanced chemical equation for the following conversion:
Ammonium sulphate from ammonia and dilute sulphuric acid.

Some properties of sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reaction (a) to (e). Some properties may be repeated.
A. Acid
B. Dehydrating agent
C. Non-volatile acid
D. Oxidizing agent

(a) \[\ce{C12H22O11 + nH2SO4 -> 12C + 11H2O + nH2SO4}\]
(b) \[\ce{S + 2H2SO4 -> 3SO2 + 2H2O}\]
(c) \[\ce{NaCl + 2H2SO4 -> NaHSO4 + HCl}\]
(d) \[\ce{CuO + 2H2SO4 -> CuSO4 + H2O}\] 
(e) \[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]

HCl, HNO₃ and H₂SO₄ are formulae of three compounds. Which of these compounds has the highest boiling point and which has the lowest?

Dilute hydrochloric acid and dilute sulphuric acid are both colourless solutions. How will the addition of barium chloride solution to each help to distinguish between the two?

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

Making use only of substances chosen from those given below:
Dilute sulphuric acid
Sodium carbonate
Zinc
Sodium sulphite
Lead
Salcium carbonate

Give the equation for the reaction by which you could obtain:
(i) Hydrogen
(ii) Sulphur dioxide
(iii) Carbon dioxide
(iv) Zinc Carbonate (two steps required).

Name the gas evolved in following case: 
The gas produced by the action of concentrated sulphuric acid on sodium chloride.

Write the equation of the following reaction:

Sulphur is heated with concentrated sulphuric acid

Write the equation of the following reaction :
Concentrated sulphuric acid is poured over sugar

State your observation for the following case :
Moist blue litmus is introduced into a gas jar of sulphur dioxide.

State your observation for the following case :
Dry red rose petals are placed in the jar of sulphur dioxide.

State your observation for the following case :

Paper soaked in potassium permanganate solution is introduced into a gas jar of sulphur dioxide.

What would you observe in the following case:

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

With the help of equations, give an outline for the manufacture of sulphuric acid by the contact process.

What property of sulphuric acid is shown by the reaction of concentrated sulphuric acid when heated with :
(i) Potassium nitrate
(ii) carbon

In the given equation identify the role played by concentrated sulphuric acid S + 2H₂SO₄→ 3SO₂ + 2H₂O

State one appropriate observation of the following:
Concentrated sulphuric acid is added dropwise to a crystal of hydrated copper sulphate.

State one appropriate observation of the following:

Dehydration of Concentrated Sulphuric acid with sugar crystals

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

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

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

A, B, C and D summarise the properties of sulphuric acid depending on whether it is dilute or concentrated.
A = Typical acid property
B = Non-Volatile acid
C = Oxidising agent
D = Dehydrating agent

Choose the property (A, B, C or D) depending on which is relevant to each of the following :
(i) Preparation of hydrogen chloride gas
(ii) Preparation of copper sulphate from copper oxide
(iii) Action of cone, sulphuric acid on sulphur

Write balanced chemical equation to show :
The oxidizing action of conc.sulphuric acid on carbon

Write balanced chemical equation to show :
The behavior of H₂SO₄ as an acid when it reacts with magnesium.

Write balanced chemical equation to show :
The dehydrating property of conc.sulphuric acid