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Chemistry

Chemistry
The most abundant element is

Silicon
Nitrogen
Calcium
Oxygen

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Chemistry
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength

O-2
O+2
O-22
O2

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Chemistry
Vinegar is ________ .

Glacial acetic acid
Diluted formic acid
Glacial formic acid
Diluted acetic acid

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Chemistry
Candle is a mixture of

Bees wax and paraffin wax
Paraffin was and stearic acid
Bees wax and stearic acid
Higher fatty acids and stearic acid

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Chemistry
Which among the following coal contains 90 per cent of carbon?

Lignite
Anthracite
Peat
Bitumen

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Chemistry
When a bond is formed between two atoms, the energy of the system will

Decrease
Remain the same
May increase or decrease
Increase

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