Phosphoric acid is prepared from

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

Phosphoric acid is prepared from

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