Q.

The compound with molecular formula C6H6, which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ______ π electrons.                           [2025]


Ans.

(8)

H3C–C≡C–C≡C–CH3→Br2+hνH3C–C≡C–C≡C–CH2Br