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Three compounds (A), (B) and (C) are giv...

Three compounds `(A), (B)` and `(C)` are given.
Which statements are correct about `(A),(B),` and `(C)` ?

A

The rate of catalytic hydrogenation is faster in `(A)` than in `(B)` and `(C)`.

B

The rate of catalytic hydrogenation is faster in `(B)` than in `(C)`

C

`(A)` has a catalytic ring whose strain on going to less `-` strained cyclopropane ring is reduced on hydrogenation. Similarly, cyclobutene ring in `(B)` on hydrogenation is reduced to less `-` streined cyclobutane ring. But, cyclopropene ring is more strained than cyclobutene ring, so faster hydrogenation is in `(A)` than in `(B)`.

D

There is a little change in the rign strain when the cyclohexen ring is reduced.

Text Solution

Verified by Experts

The correct Answer is:
a,b,c,d
The statements `(c)` and `(d)` are explanations of `(a)` and `(b)`
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Knowledge Check

  • Which statements are correct for reagents A, B, C, and D?

    A
    `{:(,(A),(B),(C),(D)),(a. ,H_2//Pt,MMPP,Cold alk. _4,O_2+PdCl_2),(,,,KMnO_4,+CuCl_2),(,,,,+H_2O):}`
    B
    `{:(,(A),(B),(C),(D)),(b. ,H_2//Pd+BaSO_4,HCO_3H,Hot alk. ,Dil. H_2SO_4),(,+qui noli n e,,KMnO_4,+Hg^(2+)):}`
    C
    `{:(,(A),(B),(C),(D)),(c. ,Sia_2BH,PhCO_3H,OsO_4//,O_2+PdCl_2),(,+CH_3COOH,,NaHSO_3,+CuCl_2),(,,,,+H_2O):}`
    D
    `{:(,(A),(B),(C),(D)), (d.,BH_3+THF,MCPBA,OsO_4//,Wacker),(,+CH_3COOH,,H_2O_2,process):}`

  • Which of the statement is/are correct about compound (C )?

    A
    Compound (C ) is a cyclic ketal with six-membered ring.
    B
    Compound (C ) is a cyclic ketal, with five-membered ring.
    C
    Cyclic ketals are inert to reduction by LAH.
    D
    Cyclic ketals are hydrolysed in both acidic and basic mediums.

  • Which statement are correct about the following compounds ?

    A
    `(I)` is not isolable because trans `-` cyclohexane is too strained.
    B
    `(II)` is isolable because trans `-` unit can be bridged by six `C` atoms. Eight`-` memebered and larger rings can have a trans`-`substituted `(C=C)` in the ring.
    C
    `(III)` is not isolable, exocyclic double bonds `(` double bond at the bridgeheat `)` are unstable because of high strain `(` due to ring and double bond joining the two rings `)`.
    D
    `(IV)` is isolable, although there is a double bond at a bridgehead `(` joining two rings`)` but one of the bridgeheadds has no `C` atom and bridgeheat `C` atoms can flatten without ring strain.

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