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

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.

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.

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.

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

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.

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:

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

1. Give only one suitable chemical test to identify the following gases.
   1. Ammonia
   2. Sulphur dioxide
   3. Hydrogen chloride
   4. Chlorine
   5. Carbon dioxide
   6. Oxygen
   7. Hydrogen
2. Select a basic gas mentioned in Q. (a). How is the basic nature suspected?
3. Select acidic gases from the gases mentioned in Q. (a). How is the acidic nature suspected?
4. The two gases A and B are bleaching agents. A is greenish-yellow and bleaches due to its oxidizing property while B is a colourless gas that bleaches due to reduction. Identify A and B?
5. Which gas turn blue cobalt chloride paper light pink? Give one similarity in the test between
   1. Cl₂ and HCl
   2. SO₂ and CO₂.

Name two carbonates which do not produce carbon dioxide on heating.

Name a colourless gas which bleaches.

Name gases which has a sour taste.