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Chemistry

Chemistry
The weight of 6.023 × 1022 atoms of carbon is

1.2 gms
12 gms
0.12 gms
120 gms

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Chemistry
A fertile soil is likely to have a pH of

9
43989
3
14

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Chemistry
Ozone layer of atmosphere absorbs:

Infra-red rays
Ultraviolet rays
All radiations of Light
Cosmic rays.

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Chemistry
Which of the following is not an addition polymer

Nylon
PVC
Polythene
Polystyrene

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Chemistry
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of

an elimination reaction
an addition reaction
an oxidation reaction
a condensation reaction

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Chemistry
A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be

Copper
Zinc
Silver
Aluminium

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