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Chemistry

Chemistry
The major constituent of air is

nitrogen
carbon dioxide
oxygen
hydrogen

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Chemistry
Total number of elements in the Periodic table

118
115
127
112

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Chemistry
The number of hydrogen bonds between guanine and cytosine in DNA is

4
2
3
1

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Chemistry
The Fungus which is used in the alcohol industry is

Candida Aibicans
Mushroom
Yeast
Rhizopus

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Chemistry
When a lead storage battery is discharged,

Sulphuric acid is consumed
Lead is formed
SO2 is evolved
Lead sulphate is consumed

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Chemistry
Natural rubber is a polymer of

Propene
Vinyl acetate
Styrene
Isoprene

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