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Chemistry

Chemistry
Which one out of the following helps in burning ?

Carbon dioxide
Carbon monoxide
Nitrogen
Oxygen

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Chemistry
The high reactivity of fluorine is due to

small size of fluorine atom
availability of d-orbitals
its high electro negativity
strong F - F bond

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Chemistry
The common refrigerant in domestic refrigerator is

Freon
Oxygen
Neon
Nitrogen

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Chemistry
In which of the following ions , the colour is not due to d-d transition ?

[CrO4]2−
[Cu(NH3)4]2+
[CoF6]3+
[Ti(H2O)6]3+

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Chemistry
Malathion is a/an

Preservative
Pesticide
Fumigant
Insecticide

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Chemistry
Muscle fatigue is caused by the accumulation of :

Pyruvic acid
Lactic acid
Oxalacetic acid
Uric acid

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