Related Questions

Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
A Sulphuric
B Hydrochloric
C Either A or B
D Neither A nor B
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 dilute sulphuric acid with phosphate rock produces
A Phosphoric acid
B Superphosphate
C Triple superphosphate
D Gypsum
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
A Carbonate
B Phosphate
C Bicarbonate
D Silicate
Sulphuric acid pickling tanks are lined with
A Nickel
B Rubber
C Aluminium
D Glass
a chemial is mixed 30 ml mixed , 10 ml is acid , how much ml of acid must be mixed such that a 50/50 mixure of water and acid is attend if no additional water is added
A 20
B 10
C 40
D 30
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
A Avoid mechanical weakening of fibre
B Remove lignin by way of crystallisation
C Increase the cellulose content
D None of these
In sulphate pulp manufacture, the pressure and temperature in the digestor is
A 10 atm., 800 °C
B 10 atm., 170-180°C
C 1 atm., 170 - 180°C
D L atm., 800°C

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