Related Questions

Sodium tri poly phosphate (STPP) is chemically represented as
A Na5P3O10
B Na4P3O8
C Na3P4O6
D Na2PO4
Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
A Sulphuric
B Hydrochloric
C Either A or B
D Neither A nor B
Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with
A Acidic refractory
B Rubber
C Karbate
D Lead or acid-proof bricks
Tri-sodium phosphate is used in boiler water treatment to reduce
A Turbidity
B Caustic embrittlement
C Suspended silica
D Dissolved oxygen
Action of phosphoric acid on rock phosphate produces
A Superphosphate
B Triple superphosphate
C Nitrophosphate
D Diammonium phosphate
Phosphoric acid is produced in wet process from phosphate rock and
A Dilute H2SO4
B Concentrated H2SO4
C Concentrated NHO3
D Concentrated HCl
Reaction of nitric acid and sulphuric acid with phosphate rock produces
A Nitrophosphate
B Diammonium phosphate
C Tricresyl phosphate
D Tributyl phosphate
Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction.
A Elementary
B Parallel
C Consecutive
D None of these
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
Phosphoric acid is prepared from
A Cryolite
B Chalcopyrite
C Rock phosphate
D None of these

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