(C) The assertion is true because ozone $(O_3)$ is indeed an allotrope of oxygen.The reason is false. While liquid oxygen is pale blue,it is paramagne

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If the Assertion is correct but Reason is incorrect.

(C) The assertion is true because ozone $(O_3)$ is indeed an allotrope of oxygen.The reason is false. While liquid oxygen is pale blue,it is paramagnetic in its triplet state due to the presence of two unpaired electrons in its antibonding molecular orbitals. In its singlet state,all electrons are paired,making it diamagnetic,not paramagnetic.

Class 12 Chemistry p-Block Elements (Class 12)Oxygen family

Medium

Assertion : Ozone is an allotrope of oxygen.
Reason : Oxygen is a bluish-coloured liquid and in its singlet state,it is paramagnetic.

AIIMS 2007 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.