Fertiliser Technology

1

Tricresyl phosphate is chemically represented as

A. (CH3 C6H4)3 PO4
B. Ca10(PO4)3F6
C. (NH4)2HPO4
D. NH4H2PO4

2
Color of nitric acid is light yellow due to the presence of
A. NO
B. NO2
C. N2 H5
D. NH3

3

5-10-5 fertilisers mean that they contain

A. 5, 10, 5% respectively of N2, P2O5 and K2O.
B. only 5 to 10% active fertiliser constituents.
C. 5 to 10% filler & carrier of soil conditioners.
D. none of these.

4
  Nitric acid is produced on commercial scale in a fertiliser plant by
A. oxidation of ammonia.
B. CaNO3 + H2SO4 reaction.
C. passing air through high voltage electric arc.
D. none of these.

5
  Phosphatic fertiliser is graded based on its __________ content.
A. P2O3
B. PCl5
C. P2O5
D. H3PO4