Let's study Chemistry 7
Chemistry
Level
3
A given compound has Index of Hydrogen deficiency 1. How many equivalents of Hydrogen are required for hydrogenation ?
0
none of these
1
2
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1 solution
An index of hydrogen deficiency (a.k.a degrees of unsaturation) is the number of hydrogen ( H 2 ) molecule equivalents needed to attain full saturation. The question states that a compound has an index of hydrogen deficiency of 1 ; therefore, one H 2 would be needed to attain full saturation. The correct answer is 1 ; regardless if the unsaturation is due to a double bond or a ring in the compound.