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
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
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
Action of phosphoric acid on rock phosphate produces
A Superphosphate
B Triple superphosphate
C Nitrophosphate
D Diammonium phosphate
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
A Carbonate
B Phosphate
C Bicarbonate
D Silicate
Phosphoric acid is produced in wet process from phosphate rock and
A Dilute H2SO4
B Concentrated H2SO4
C Concentrated NHO3
D Concentrated HCl
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
How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?
A 8
B 6
C 7
D 9
The molecular mass of sulphuric acid is 98. If 49 g of the acid is dissolved in water to make one litre of solution, what will be the strength of the acid?
A Two normal
B One normal
C 0.5 normal
D Four normal
In a mixture of 30 liters, the ratio of acid and water is 7 : 3. How much more water is to be added to get a new mixture containing acid and water in the ratio of 3 : 7?
A 30 liters
B 25 liters
C 40 liters
D 35 liters

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