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Which of the following alkenes on hydrog...

Which of the following alkenes on hydrogen in the presence of an acid will give a primary alcohol ?

A

But -`2`-ene

B

But-`1`-ene

C

Ethene

D

Propene

Text Solution

Verified by Experts

The correct Answer is:
C
Alkenes add water in the presence of an acid catalyst. Since addition followers Markovnikov's orientation and rearrangement often occur , ethyl alcohol is the only primary alcohol that can be synthesized from ethene
`CH_(3) = CH_(2) underset(H^(+)) overset(H_(2)O) rarr CH_(3)CH_(2)OH`
The reaction usually produces secondary and tertiary alcohols
`CH_(3)CH = CHCH_(3) underset(H^(+)) overset(H_(2)O) rarr CH_(3)underset(2^(@)"alcohol")(CH_(2))overset(OH)overset(|)(CH)CH_(3)`
`overset(or) (CH)_(3)CH_(2)CH = CH_(2)`
`CH_(3)CH = CH_(2) underset(H^(+))overset(H_(2)O)rarr CH_(3)underset(2^(@)"alcohol")overset(OH)overset(|)(CH)CH_(3)`
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Knowledge Check

  • Which of the following metals does not give hydrogen with acids ?

    A
    Iron
    B
    Copper
    C
    Aluminium
    D
    Magnesium

  • Which of the following is a primary alcohol ?

    A
    neo-Pentyl alcohol
    B
    sec-Pentyl alcohol
    C
    tert-Pentyl alcohol
    D
    None of these

  • Which of the following alcohols connot be prepared from an alkene?

    A
    B
    C
    D