Allied solutions

Allied solutions

Grade 8

Hydrogen | Exercise

Question 11

Q11) With reference to the uses of hydrogen, give reasons for the following:

(a) Hydrogen is not used in air balloons

(b) A mixture of hydrogen & oxygen on burning, find application in welding & cutting metals

(c) Reaction of hydrogen with nitrogen under specific conditions finds industrial utility.

Solution :

(a) It is highly inflammable, for safety reasons it is not used in air balloons.

(b) Oxygen and hydrogen burn and produce high temperatures upto 2800°C and are used for welding and cutting metals.

(c) Ammonia is a basic gas produced when 3 volumes of H2 react with 1 volume of N2 gas in presence of Fe which acts as a catalyst N_2+3H_2⇌2NH_3, which finds applications in fertilizers and nitric acid and explosives.

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Question 11

Q11) With reference to the uses of hydrogen, give reasons for the following:

(a) Hydrogen is not used in air balloons

(b) A mixture of hydrogen & oxygen on burning, find application in welding & cutting metals

(c) Reaction of hydrogen with nitrogen under specific conditions finds industrial utility.

Solution :

(a) It is highly inflammable, for safety reasons it is not used in air balloons.

(b) Oxygen and hydrogen burn and produce high temperatures upto 2800°C and are used for welding and cutting metals.

(c) Ammonia is a basic gas produced when 3 volumes of H2 react with 1 volume of N2 gas in presence of Fe which acts as a catalyst N_2+3H_2⇌2NH_3, which finds applications in fertilizers and nitric acid and explosives.

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