Q.
The molecular weight of a hydrocarbon is 96. Index of hydrogen deficiency of the compound is 2. Which of the following structure is suitable for the hydrocarbon discussed?
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a
b
c
d
Both 1 and 3
answer is D.
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Detailed Solution
Hydrocarbon having Index of hydrogen deficiency (IHD) 2 can be an alkyne, Alka-diene, cycloalkene or a bicyclic compound. The general molecular formula for the compounds having IHD 2 is . From this we can calculate the number of carbons present in the hydrocarbon by using molecular weight (MW).CnH2n--2 = MW⇒12n + 2n--2 = MW ⇒n = MW + 214 number of Carbons, n = 96 + 214 = 9814 = 7The below are having same molecular formula so these two are suitable hydrocarbons for the given data.
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