Hydrazine Questions and Answers

This set of Chemical Industry Multiple Choice Questions & Answers (MCQs) focuses on “Inorganic Chemical – Hydrazine”.

1. What is the molecular weight of hydrazine?
a) 28
b) 30
c) 32
d) 17
View Answer

Answer: c
Explanation: Molecular formula of hydrazine is N₂H₄. 2 nitrogen atoms and 4 hydrogen atoms make 1 mole of N₂H₄. Molecular weight = 2*14 + 4*1 = 32.

2. Hydrazine is miscible with water. Is the statement true/false?
a) True
b) False
View Answer

Answer: a
Explanation: Hydrazine is miscible with water since it mixes in all proportions with water. It is also miscible with low molecular weight alcohols and forms constant boiling mixture with 28.5 weight % water.

3. What is the percentage of N₂H₄ present in hydrazine hydrate?
a) 64% N₂H₄
b) 80% N₂H₄
c) 98% N₂H₄
d) 50% N₂H₄
View Answer

Answer: a
Explanation: Percentage of N₂H₄ present in hydrazine hydrate is 64% N₂H₄ whereas 98% N₂H₄ present in the anhydrous hydrazine produced from the distillation of hydrazine hydrate.

4. The gas produced in the side reaction of ammonia-sodium hypochlorite process is _________
a) H₂
b) N₂
c) Cl₂
d) O₂
View Answer

Answer: b
Explanation: The side reaction of ammonia-sodium hypochlorite process is 2NH₂Cl+N₂H₄ →2NH₄Cl+N₂, hence the gas produced is nitrogen.

5. Inhibitor used in the formation of chloro amine is ___________
a) Aspirin
b) Nitric oxide
c) Glycol
d) Gelatin
View Answer

Answer: d
Explanation: Aqueous ammonia reacts with sodium hypochlorite in 3:1 ratio to produce chloro amine and sodium hydroxide in presence of glue or gelatin inhibitor.

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6. Which gas is used for shipping anhydrous hydrazine?
a) Nitrogen
b) Nitric oxide
c) Oxygen
d) Chlorine
View Answer

Answer: a
Explanation: Nitrogen gas is used for shipping anhydrous hydrazine in stainless steel drums. A little bit of Organic inhibitor is added for providing stability.

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