Question

Q4 Select the correct answer from the choice in bracket to complele laul sentence.
1. The acid
preparation of hydrogen, using zinc and an acid.
[dil.H SO,, dil. HNO3, dil. HCI) is not used in the laboratory
2 In Bosch process the catalytic reduction of steam to hydrogen is carried out by
3. A foul sinelling gas formed when hydrogen reacts with a molten non-metall
[CO2, CO, C]
(hydrogen chloride, hydrogen sulphide, ammonia).
4. The product formed on combustion of hydrogen in air is
water gas, water, producer gas).
5. The
gas which has now replaced hydrogen in air balloons is
5 Match the statements in List I with the appropriate answer in List II.
[argon, helium, neon​

Answer 1

Answer:

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(i) Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The HCl gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.

(ii) NaCl+H

2

SO

4

→NaHSO

4

+HCl(g)

Answer 2

1.dil. HNO3

2.carbon monoxide( CO )

3.hydrogen sulphide

4.water

5.helium