Chemical Engineering - Fertiliser Technology
Exercise :: Fertiliser Technology - Section 1
36.
P2 O5 content in triple superphosphate is about __________ percent.
Answer: Option A
Explanation:
37.
H3 PO4 is the chemical formula of __________ phosphoric acid.
Answer: Option B
Explanation:
38.
Heating of orthophosphoric acid to 250°C produces
A.
metaphosphoric acid B.
pyrophosphoric acid C.
no change in it D.
none of these
Answer: Option B
Explanation:
39.
Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.
A.
Haber's B.
Stengel C.
Le-chatlier's D.
Du-pont's
Answer: Option B
Explanation:
40.
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.
A.
stabilisation B.
increasing the effectiveness C.
improving the strength & heat resistance D.
all a, b & c
Answer: Option D
Explanation: