Question:medium
Which of the following alkenes will react fastest with \( \mathrm{H_2} \) under catalytic hydrogenation conditions?
• [(1)]
\(\mathrm{RCH=CHR}\)
• [(2)]
\(\mathrm{RCH=CH_2}\)
• [(3)]
\(\mathrm{R_2C=CHR}\)
• [(4)]
\(\mathrm{R_2C=CR_2}\)
Which of the following alkenes will react fastest with \( \mathrm{H_2} \) under catalytic hydrogenation conditions?
• [(1)] \(\mathrm{RCH=CHR}\)
• [(2)] \(\mathrm{RCH=CH_2}\)
• [(3)] \(\mathrm{R_2C=CHR}\)
• [(4)] \(\mathrm{R_2C=CR_2}\)
• [(1)] \(\mathrm{RCH=CHR}\)
• [(2)] \(\mathrm{RCH=CH_2}\)
• [(3)] \(\mathrm{R_2C=CHR}\)
• [(4)] \(\mathrm{R_2C=CR_2}\)
Show Hint
More substituted alkenes tend to react faster with hydrogen under catalytic conditions due to increased electronic density.
Updated On: Apr 22, 2026
- A
- B
- C
- D
Show Solution
The Correct Option is B
Solution and Explanation
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