Engineering Questions with Answers - Multiple Choice Questions

Chemical Industry MCQ’s – Inorganic Chemical – Hydrazine

1 - Question

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 - Question

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 - Question

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 - Question

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 - Question

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.



6 - Question

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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