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Chemistry

Chemistry
The length of double bond is _______ than single bond

Longer
None of these
Shorter
Of same lenght

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Chemistry
In upper layer of atmosphere ozone is formed by

The action of nitrogen on oxygen in atmosphere
The combination of oxygen molecules
The action of ultraviolet rays on oxygen
Subjecting oxygen to high pressure

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Chemistry
The number of electrons presents in H+ is

three
one
two
zero

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Chemistry
Nylon is a type of

Polyolefin
Polyamide
Polyester
Acrylic

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Chemistry
The rusting of iron is a/an

Electrochemical change
None of these
Electrical change
Physical change

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

May increase or decrease
Decrease
Increase
Remain the same

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