Engineering Questions with Answers - Multiple Choice Questions
Chemical Industry MCQ’s – Inorganic Chemical – Nitrogen Phosphate
1 - Question
Calcium nitrate is extremely hygroscopic.
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
d) Nitric acid
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?
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?
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?
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.