Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: \[[Co{{(N{{O}_{2}})}_{3}}{{(N{{H}_{3}})}_{3}}]\] does not show optical isomerism. Reason: It has a plane of symmetry.A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but the reason is not the correct explanation of the assertion.
C) If assertion is true statement but reason is false.
D) If both assertion and reason are false.
Correct Answer: A
Solution :
Optical isomerism is due to the absence of elements of symmetry, i.e., plane of symmetry, axis of symmetry or centre of symmetry in complex. If the molecules possess any of these elements of symmetry, the compound will not be optically active \[[Co{{(N{{o}_{2}})}_{3}}{{(N{{H}_{3}})}_{3}}]\] possesses a plane of symmetry and can superimposed on its mirror image, so it is not an optically active complex.
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