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Chemistry

Chemistry
The percentage of oxygen in air is approximately

1
0.21
0.01
0.78

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Chemistry
________ is used for making vinegar.

Acetic acid
Malic acid
Oxalic acid
Tartaric acid

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Chemistry
The strongest oxidizing agent among the following is:

Iodine
Chlorine
Oxygen
Fluorine

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Chemistry
Which of the following is a monoatomic gas?

Nitrogen
Neon
Oxygen
Fluorine

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Chemistry
The most important ore of aluminium is

monazite
magnetite
bauxite
haematite

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Chemistry
The metals commonly used for electroplating are

Nickel, Lead and Chromium
Gold, Sodium and Potassium
Chromium, Copper and Nickel
Gold, Sodium and Chromium

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