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

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

How will you identify?
Sulphur dioxide gas

Name the following:
A nitrate which has no water of crystallization.

Name the following:
A sulphate insoluble in water.

Give two tests of the following:
NH₃

Write the steps needed for flame test ?

Write sqauential observation for effect of heat on Lead carbonate.

State the effect of adding a small amount of : (a) sodium hydroxide (b) ammonium hydroxide followed by an excess in case to samples of the salt solutions.
Calcium nitrate [ small amount __________ in excess __________ ]

State the effect of adding a small amount of : (a) sodium hydroxide (b) ammonium hydroxide followed by an excess in case to samples of the salt solutions.
Zinc nitrate [ small amount ________ in excess ________]

A solution of hydrogen chloride in water is prepared. The following substances are added to separate portions of the solution:

The questions (i) to (v) refer to the following salt solutions listed A to F:

1. Copper nitrate
2. Iron (II) sulphate
3. Iron (III) chloride
4. Lead nitrate
5. Magnesium sulphate
6. Zinc chloride

1. Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
2. Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution ?
3. Which solution will give a white precipitate, when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
4. Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it ?
5. Which solution gives a white precipitate with excess ammonium hydroxide solution?