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Chemical Process

Chemical Process
Chemical formula of 'salt cake' is

Na₂SO₄
MgSO₄
CaSO₄
BaSO₄

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Chemical Process
Styrene (a monomer for the production of polystyrene) is commercially produced by

Catalytic dehydrogenation of ethyl benzene
Reacting ethylene oxide with acetal-dehyde
Fermentation of starch
Dehydration of ethyl alcohol followed by hydrogenation

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Chemical Process
A mineral is termed as 'ore', if

The metal present in it is costly
A metal can be economically extracted from it
All of these
It contains ≥ 40% metal

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

0.5
35
20
5

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Chemical Process
Chemical formula of oleum is

H₂SO₃
H₂S₂O₇
H₂SO₄
H₂SO₇

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Chemical Process
Percentage of alcohol in beer may be around __________ percent.

27-32
2-8
18-23
1-4

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