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Chemical Process

Chemical Process
Chemical formula of BHC, which is an insecticide is

C₆H₅Cl
C₆H₄Cl₂
C₆Cl₆
C₆H₆Cl₆

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Chemical Process
The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.

8500
800
1600
4000

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Chemical Process
Percentage of glycerene present in the spent lye obtained during soap manufacture is about

5
0.5
35
20

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Chemical Process
Finely ground calcium aluminate & silicate is a/an

Cement
Abrasive
Cermet
Explosive

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Chemical Process
Chemical name of Grignard reagent is

Ethyl magnesium chloride
Sodium thiosulphate
Sodium sulphite
Sodium bicarbonate

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Chemical Process
Addition of calcium oxide to water produces

All of these
Hissing sound
Exothermic heat
Slaked lime

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