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Chemistry

Chemistry
Of the following commonly used materials, the one that is not an alloy is

Brass
Bronze
Steel
Copper

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Chemistry
Global warming is mainly due to accumulation of

Oxides of nitrogen
Oxides of sulphur
Carbon dioxide
Carbon monoxide

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Chemistry
Which one out of the following helps in burning ?

Carbon dioxide
Carbon monoxide
Nitrogen
Oxygen

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Chemistry
Synthetic detergents are made from

Sodium stearate
Sodium salt of benzene carboxylic acid
Sodium palmitate
Sodium salt of benzene sulphonic acid

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Chemistry
Catalyst is a substance which

Increases the rate of the reaction
Decreases the rate of reaction
Has no action on the rate of the reaction
None of these

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Chemistry
Who modified Bohr's theory by introducing elliptical orbits for electron path

Sommerfeld
Thomson
Hund
Rutherford

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