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91.

Sodium tripolyphosphate (STPP) is made by reacting orthophosphoric acid with

A.	limestone	B.	quick lime
C.	slaked lime	D.	soda ash

92.

Sodium tripolyphosphate (STPP) is made by reacting saturated soda ash solution and orthophosphoric acid. To form one mole of monosodium to two moles of disodium phosphate ratio of Na2O/P2O5 must be

A.	0.167	B.	16.7
C.	17.6	D.	1.67

93.

Tricresyl phosphate (TCP) is made by reacting cresylic acid (CH3.C6H4.OH) with

A.	phosphorus oxychloride	B.	phosphorus trichloride
C.	orthophosphoric acid	D.	phosphorus pentoxide

94.

Tricresyl phosphate is used

A.	as an additive and antiknock supplement compound for petrol	B.	in extraction of uranium plutonium and thorium nitrates
C.	in nuclear reactor fuel reprocessing	D.	as fertilizer

95.

Tributyl phosphate is used

A.	in extraction of uranium plutonium and thorium nitrates	B.	as fertilizer
C.	as plasticizer	D.	as an additive and antiknock supplement compound for petrol

96.

Sodium tripolyphosphate (STPP) is mainly used

A.	in detergents formulation	B.	in machine industries
C.	as fertilizer	D.	in plastics and coatings

97.

Nitrophosphates are mixtures of

A.	ammonium nitrate and various phosphates made available by action of nitric acid and sulphuric acid on phosphate rock	B.	gypsum and ammonium sulphate
C.	calcium phosphate and ammonium bicarbonate	D.	ammonium bicarbonate and phosphorus oxychloride

98.

The overall steam reformation of naphtha is

A.	endothermic process	B.	slightly exothermic process
C.	highly exothermic process	D.	autocatalytic process

99.

Ammonia synthesis gas is manufactured by

A.	steam reforming of light naphtha	B.	partial oxidation of fuel oil
C.	partial oxidation of coal	D.	all of the above

100.

C/H ration (by weight) of natural gas is about

A.	15-25	B.	7?8
C.	3?4	D.	1