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Chemical Process

Chemical Process
Essential oils are usually obtained using

Extractive distillation
Leaching
Steam distillation
Solvent extraction

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

700
1100
300
900

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Chemical Process
Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and

Phosphoric acid
Sulphuric acid
Hydroflouric acid
Hydrochloric acid

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Chemical Process
Main constituent of limestone is

CaCO₃
Na₂CO₃
CaSO₄
MgCO₃

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Chemical Process
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

7-14 and 40-50
7-14 and 14-30
14 - 30 and 40-50
10 - 20 and 40 - 50

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Chemical Process
Rosin soap is added during paper manufacture to

Impart resistance to penetration by liquids
Impart adhesive properties
Improve opacity
None of these

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