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Chemistry

Chemistry
Which one of the following elements is used in the manufacture of safety matches?

Silicon
Graphite
Sodium
Phosphorus

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Chemistry
Catalyst is a substance which

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

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Chemistry
Sulphur dioxide level in the atmosphere can be reduced by using

More efficient car engines
Catalytic converters in industry
Static electricity to attract it in factory chimneys
Low - sulphur fuels

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Chemistry
Synthetic detergents are prepared from

Potassium salts of higher fatty-acids
Sodium salts of higher fattyacids
Glycerides
Hydrocarbons of petroleum

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Chemistry
CNG used in automobiles to check pollution, mainly consists of

H2
N2
CO2
CH4

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Chemistry
Which one of the following is found in Vinegar ?

Butyric acid
Propionic acid
Formic acid
Acetic acid

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