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Chemical Process

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

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

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Chemical Process
Systemic insecticides

Kill insects following external bodily contact
Emit poisonous vapour
Are absorbed throughout the plant
Are stomach poisons

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Chemical Process
Catalytic oxidation of naphthalene produces

Phenol
None of these
Phthalic anhydride
Styrene

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Chemical Process
Which form of sulphur is the most stable at room temperature?

Flowers of sulphur
Rhombic
Plastic
Monoclinic

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Chemical Process
Sucrose is a

Polysacchride
Disacchride
None of these
Monosacchride

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Chemical Process
Roasting of metallurgical ores is done mainly to

Remove arsenic & sulphur
Dehydrate it
Remove CO₂ & H₂O
Sinter the ore

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