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Question

The IUPAC name of the hydrocarbon HCCCH=CHCH=CH2 is

A
Hex-3,5-dien-5-yne
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B
Hexa-1,2-dien-1-yne
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C
Hexa-1,3-dien-5-yne
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D
Hex-3,5-dien-1-yne
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Solution

The correct option is C Hexa-1,3-dien-5-yne
HC6C5C4H=C3HC2H=C1H2.The preference is given to double bond therefore C atoms are numbered as shown. There are 2 double bonds at position 1 and 3 and one triple bond at position 5

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