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Electronegativity and Electron Gain Enthalpy

Assertion: Oz...

Question

Assertion: Ozone is an allotrope of oxygen.
Reason: Oxygen is bluish-colored liquid and in singlet state it is para-magnetic.

A

If both assertion and reason are true and the reason is a correct explanation of the assertion

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B

If both assertion and reason are true but reason is not a correct explanation of the assertion

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C

If the assertion is true but reason is false

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D

If both the assertion and reason are false

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E

If the assertion is false but the reason is true

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Solution

The correct option is A If the assertion is true but reason is false
Ozone $(O_{3})$ is a triatomic molecule consisting of three oxygen atoms. It is an allotrope of oxygen that is much less stable than the diatomic $O_{2}$ .

Liquid $O_{2}$ is a clear substance with a light sky blue coloration.

In singlet oxygen, all the electron spins are paired and hence it is not paramagnetic in nature.

Hence assertion is true but the reason is false.

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