JEE Main Chemistry question
The number of *sp²*-hybridised carbon atoms in hexa-1,3-dien-5-yne (CH₂=CH–CH=CH–C≡CH) is .
Answer: 4
Solution
C1 and C2 (the 1,2-double bond) and C3 and C4 (the 3,4-double bond) are each *sp²*; C5 and C6 (the 5,6-triple bond) are *sp*.