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Chemical Process

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

5
35
20
0.5

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Chemical Process
Hydrogenation of edible vegetable oils

Increases their melting point
Is done in presence of nickel catalyst
All of these
Is an exothermic reaction

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Chemical Process
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to

Increase the cellulose content
None of these
Remove lignin by way of crystallisation
Avoid mechanical weakening of fibre

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Chemical Process
Gun powder uses

Sulphur
All of these
Potassium nitrate
Charcoal

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Chemical Process
Low temperature carbonisation of coal takes place at __________ °C.

1100
700
300
900

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Chemical Process
Chemical formula of 'salt cake' is

Na₂SO₄
MgSO₄
CaSO₄
BaSO₄

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