1.

In the following compound, the number of 'sp' hybridized carbonis {:(CH_(2)=C=CH-CH-C-=CH),("|"),(""CN):}

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Solution :Four, i.e., `{:(CH_(2)=overset(SP)(C)=CH-CH-overset(sp)(C)-=overset(sp)(CH)),("|"),(""UNDERSET(sp)(C)-=N):}`


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