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Chemistry

Chemistry
The main source of Naphthalene is

Diesel
Coal-tar
Charcoal
Camphor

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Chemistry
Which amidst the following is not a gem stone ?

Pearl
Topaz
Opal
Cat's-eye

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Chemistry
Which of the following is not an addition polymer

Polystyrene
Polythene
PVC
Nylon

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Chemistry
The value of gas constant R in Ergs deg–1 mole–1 is

4.183 × 107
8.413 × 107
8.314 × 107
8.341 × 107

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Chemistry
Bee sting contains

An acidic liquid
An alkaline liquid
A salt solution
A corrosive liquid

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Chemistry
Hardness of the water is commonly measured in terms of

Magnesium carbonate equivalents
Magnesium sulphate equivalents
Calcium sulphate equivalents
Calcium carbonate equivalents

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