Engineering Questions with Answers - Multiple Choice Questions

Chemical Industry MCQ’s – Inorganic Chemical – Nitrogen Phosphate

1 - Question

Calcium nitrate is extremely hygroscopic.
a) True
b) False
View Answer Answer: a
Explanation: Calcium nitrate is highly hygroscopic because it absorbs water from the atmosphere to the maximum extent but doesn’t make the substance soluble in water.

2 - Question

What is the main component of nitro phosphates?
a) Ammonium nitrate
b) Ammonium phosphate
c) Ammonia
d) Nitric acid
View Answer Answer: a
Explanation: Main component of nitro phosphates is ammonium nitrate since nitro phosphates are mixtures of ammonium nitrate and many different phosphates.

3 - Question

What is the chemical formula of mono calcium phosphate?
a) CaH4(PO4)2
b) Ca3(PO4)2
c) CaHPO4
d) Ca(H2PO4)2
View Answer Answer: d
Explanation: CaH4(PO4)2 represents super phosphate, Ca3(PO4)2 represents calcium phosphate, and CaHPO4 represents bi calcium phosphate where as Ca(H2PO4)2 represents mono calcium phosphate.

4 - Question

Which of the following is not a reactant of carbo nitric process?
a) HNO3
b) CO2
c) Ca3(PO4)2
d) H2SO4
View Answer Answer: d
Explanation: Carbo nitric process is a complex reaction involving calcium phosphate Ca3(PO4)2, ammonia NH3, nitric acid HNO3, carbon dioxide CO2, and water.

5 - Question

What is the strength of nitric acid used in the manufacture of nitro phosphates?
a) 25-40%
b) 10-15%
c) 50-60%
d) 5-10%
View Answer Answer: a
Explanation: The strength of nitric acid used is 25-40% and the chemical reaction is completed in the ammoniating tank to which the digested slurry is pumped.

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