Uses of Hydrogen

Q.

The reason why balloons are filled with helium instead of hydrogen is:-

1. Hydrogen is toxic

2. Hydrogen is lighter than helium

3. Hydrogen is flammable

4. Hydrogen escapes from the balloon quickly

Q.

State four uses of hydrogen

Q.

Hydrogen gas is not obtained when zinc reacts with:

1. Cold water

2. Hot $NaOH$ solution

3. $Conc.H_{2}S{O}_4$

4. Dil. $HCl$

Q.

_____ is a colorless gas that is produced by the reaction of active metal with dilute Hydrochloric acid.

Q.

Which of the following gases is used to store human organs meant for transplantation at low temperatures in hospitals?

1. Nitrogen

2. Carbon dioxide

3. Oxygen

4. Argon

Q. $\mathrm{Carbon}\mathrm{reacts}\mathrm{with}\mathrm{NaOH}\mathrm{to}\mathrm{produce}{H}_2\mathrm{gas}.$

1. True
2. False

Q.

Give reasons for the following :

(a) Hydrogen can be used as a fuel.

(b) Though hydrogen is lighter than air it cannot be collected by downward displacement of air.

(c) A pop sound is produced when hydrogen gas is burnt.

(d) Helium has replaced hydrogen in weather observation balloons.

(e) Nitric acid is not used for the preparation of hydrogen gas.

Q.

Write the uses of oxygen.

Q.

Nitrogen is a non-metal whose presence in the air reduces the rate of combustion.

1. True
2. False

Q. Which of the given metals produces hydrogen gas on reacting with hydrochloric acid as well as sodium hydroxide solution?​

1. Sodium
2. Aluminium
3. Iron
4. Copper

Q. Why isn’t hydrogen gas used as a domestic or industrial fuel, although it has a very high calorific value? State three reasons for the answer.​ [3 marks]

Q.

Can water not be formed by compounding hydrogen and oxygen?

Q.

Can water be formed by compressing hydrogen and oxygen ?

Q.

The name hydrogen is derived from ___.

1. Heat generating

2. Water generating

3. Water fearing

4. Fire generating

Q.

Which of the following are the uses of hydrogen?

1. Production of fuel gases

2. Manufacture of ammonia and methanol

3. Conversion of unsaturated to saturated oils

4. Rocket fuel and fuel cells

Q.

Some reasons are given regarding the limited use of H₂ as a fuel.
I) Its calorific value is low.
II) Its availability in a free state is less.
III) It is difficult to store.
IV) It is not a clean fuel.

Which of the following statements are correct?

1. II and III

2. II III and IV

3. I and III

4. I II and III

Q. Why isn’t hydrogen gas used as a domestic or industrial fuel, although it has a very high calorific value? State three reasons for the answer.​ [3 marks]

Q. The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is

Q.

Choose the correct statement(s).

1. Hydrogen is used in the oxyhydrogen torch

2. Hydrogen is used in rocket fuels

3. Hydrogen is used in Haber's process for manufacturing of ammonia

4. Hydrogen is used in fluorescent bulbs

Q.

State four uses of hydrogen

Q.

Question 1. Why has helium gas replaced hydrogen in weather observation ballons?

Question 2. Why there a pop sound when hydrogen is burnt?

Q.

Water can be synthesized by burning _________ in air.

1. Hydrogen

2. Carbon dioxide

3. Oxygen

4. Nitrogen