1.

Assertion : [10]Annulene is not aromatic though it contains Huckel number of pi-electrons. Reason:Steric interaction between internal hydrogens makes it non-planar

Answer»

If both assertion and reason are true and the reason is the correct explanation of the assertion
If both assertion and reason are true butreason is not the correct explanation of the assertion
if assertion is true but reason is false
If assertion and reason both are false

SOLUTION :
Due to SERVERE non-bonded interactions between the internal (as shown in FIGURE), the RING assumes non-planar geometry


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