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

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 diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.

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

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:
Aqueous lead nitrate to lead sulphate.

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

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

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

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

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 ___________

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 ?

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

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?

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).

How will you identify?
Chloride ion

How will you identify?
Chlorine gas