Electric process as compared to wet process (for the manufacture of phosphoric acid) ?
(A) Can use only high grade phosphate rock
(B) Is used less frequently
(C) Produces a valuable by-product called gypsum
(D) Is weak acid process
Rock phosphate constitutes mainly of___________________?
(A) Fluorapatite
(B) Di-calcium phosphate
(C) Mono-calcium phosphate
(D) Di-ammonium phosphate
Iron is not used alone as a catalyst in ammonia synthesis, because___________________?
(A) Its activity declines rapidly, if heated to above 520°C
(B) It decomposes ammonia
(C) It gets oxidised above 500°C
(D) None of these
Phosphoric acid is produced in wet process from phosphate rock and____________________?
(A) Dilute H2SO4
(B) Concentrated H2SO4
(C) Concentrated NHO3
(D) Concentrated HCl
Out of the following, N2 content is minimum in_____________________?
(A) Urea
(B) Ammonium nitrate
(C) Ammonium sulphate
(D) Ammonium chloride
Ammonium sulphate can be produced by reacting gypsum with____________________?
(A) Ammonia
(B) Ammonium carbonate
(C) Nitric acid
(D) None of these
Reaction of nitric acid and sulphuric acid with phosphate rock produces_________________?
(A) Nitrophosphate
(B) Diammonium phosphate
(C) Tricresyl phosphate
(D) Tributyl phosphate
Red phosphorous is changed into white phosphorous by______________________?
(A) Heating in presence of light
(B) Melting under pressure
(C) Vaporisation followed by condensation
(D) None of these
NPK fertiliser is a _______________ fertiliser?
(A) Complex
(B) Mixed
(C) Nitrogenous
(D) Phosphatic