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Chemistry

Chemistry
Which of the following is the major constituent of LPG?

Propane
Ethane
Butane
Methane

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

Zero
8
–4
4

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Chemistry
The chemical name of quartz is

Sodium silicate
Sodium phosphate
Calcium oxide
Calcium phosphate

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Chemistry
By which organic compound all the oils are known ?

Protein
Hydrocarbon
Carbohydrate
Ester

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Chemistry
The chief constituent of natural gas is:

Nitrogen
Helium
Propane
Methane

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Chemistry
A pungent smell often present near the urinals is due to

Urea
Ammonia
Chlorine
Sulphur-di- oxide

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