Engineering Questions with Answers - Multiple Choice Questions
Chemical Industry MCQ’s – Inorganic Chemical – Fertilizer Industry
1 - Question
Which component of fertilizer is used in stimulates early growth purpose?
Explanation: Phosphorus stimulates early growth and accelerates seeding or fruit formation in later stages of growth while potassium is essential to development of the starches of potatoes and grains.
2 - Question
Potassium is used as fertilizer for which purpose?
a) Development of stems and leaves
b) Accelerating seeding
c) To prevent disease
d) Early stages of plant growth
Explanation: Potassium is supplied in the soil to prevent disease and to lessen the effects of excessive nitrogen application. Accelerating seeding is done by phosphorus, early stages of plant growth and development of stems and leaves are done by nitrogen.
3 - Question
Which salt of potassium consist highest amount of Nacl?
c) Hard salt
Explanation: Sylvinite contain 69.5% Nacl, carnallite contain 21.5% Nacl, hard salt contain 44.5% Nacl and 22.6% potassium chloride.
4 - Question
How liquid NH3 fertilizer can be produced?
a) By the gypsum process
b) By fauser process
c) By solvay process
d) From NH3 and HCL
Explanation: Liquid NH3 fertilizer can be produced from gypsum process by double decomposition with ammonium nitrate. Solvay process and NH3-HCL are used to produce ammonium chloride which contains 24% nitrogen.
5 - Question
Which one is urea formaldehyde condensation fertilizer mentioned below?
b) Lime urea
Explanation: Uramite is the urea formaldehyde condensation products which have been introducing as fertilizer. It is a condensation product of 3 moles of urea and 1 moles of formaldehyde. It consists of 38% nitrogen.
6 - Question
How potassium nitrate salt is obtained?
a) From a mixture of KCl and NaNO3
b) From a mixture of KCl and HNO3
c) From a mixture of KCl and NH4NO3
d) From a mixture of KCl and KNO3
Explanation: Potassium nitrate salt is obtained by adding potassium chloride to hot solutions of sodium nitrate. After that sodium chloride got separated and KNO3 is crystallizes on cooling.
7 - Question
What is the organic raw material source of potash?
a) Hard coal
c) Wool suint
d) Sea water
Explanation: The sheep secretes part of the potash from the grass it eats into the wool with it’s sweat. Crood wool contains about 50% suint of which 20% consists of potassium salts and remainder of fats.
8 - Question
Which component is remain as ‘final liquor’ in KCl recovery process?
Explanation: In KCl recovery process a high concentration of magnesium chloride solutions remain as ‘final liquor’ containing only small amount of alkali chloride. Mgcl2 is much more water soluble than KCl at low temperature.
9 - Question
From where K2SO4 is recovered?
a) Epsom salts
b) Hard salts
d) Rock salt
Explanation: K2SO4 is recovered from epsom salts in recovery of byproducts of potassium industry. Pure epsom salt is obtained by crystallization from concentrated solution in wooden vats.
10 - Question
What is ‘X’ in the following flow chart?
b) Ammonium sulfate
c) Ammonium chloride
d) Only ammonia
Explanation: If a mixture of ammonia, carbon -di- oxide and steam is heated in an autoclave to about 170 C and 140 atm urea can be obtained from the intermediate ammonium carbonate.