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Chemistry

Chemistry
What particles move around the nucleus of an atom and are negatively charged?

Protons
Positrons
Neutrons
Electrons

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Chemistry
Global warming is mainly due to accumulation of

Carbon monoxide
Oxides of sulphur
Oxides of nitrogen
Carbon dioxide

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Chemistry
Which one of the following organic compound is used to remove stains of iron compounds?

Oxalic acid
Cinnamic acid
Phthalic acid
Benzoic acid

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Chemistry
When formaldehyde and potassium hydroxide are heated, we get

Acetylene
Methane
Ethyl formate
Methyl alcohol

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Chemistry
The chief source of naphthalene is

Camphor
Charcoal
Diesel
Coal-tar

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Chemistry
It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of

CO2
SO2
Unburnt petrol
CO

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