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Which of the following catalysts or chem...

Which of the following catalysts or chemical reagents are emplyted for the syn addition of hydrogen to alkynes?
(i) Lindlar's catalyst
(ii) P-2 catalyst
(iii) `B_2H_6`
(iv) `DIBAL-H`

A

(i),(ii)

B

(i),(ii),(iii),(iv)

C

(i),(iii),(iv)

D

(i),(ii),(iii)

Text Solution

Verified by Experts

The correct Answer is:
B
Hydrogenation of alkynes in the presence of P-2 catalyst and lindlar's catalyst, and reduction by `B_2H_6` and DIBAL-H causes the syn addition of hydrogen to
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Knowledge Check

  • Which of the following catalyst is used in the polymerisation of CH-=CH to C_6H_6

    A
    `AlCl_3`
    B
    `HgSO_4`
    C
    `NbCl_3`
    D
    `HCl`

  • Which one of the following alkenes will react faster with H_(2) under catalyst hydrogenation condtion?

    A
    B
    C
    D

  • The reduction of 3-hexyne with H_(2) /Lindlar’s catalyst gives predominantly -

    A
    n-Hexane
    B
    Trans-3-hexene
    C
    Cis-3-hexene
    D
    A mixture of cis-and trans-3-hexene
    • R SHARMA-ALKYNES-Follow-up Test 5
    1. Which of the following catalysts or chemical reagents are emplyted for...

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    2. Which of the following alkynes is not normally reduced to alkene by so...

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    3. Which of the catalysts should be used to hydrogenate but-2-yne into bu...

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    4. Which of the following is correct?

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    5. CH3C-=C CH3underset(CH3CH2OH)overset(Na)toP Identify the product.

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    6. When but-1-yne reacts with two equivalents of HBr, the major product i...

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    7. When but-1-yne reacts with two equivalents of HBr, in the presence of ...

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    8. Which of the following statements is correct?

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    9. Which of the following alkynes is insoluble in conc. H2SO4?

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    10. The product (s) obtained by the oxymercuration (HgSO4+aq.H2SO4) of but...

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    11. Which of the following reagents would convert but-1-yne into but-2-yne...

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    12. CH3C-=Choverset(NaNH2)toAoverset(D2O)toB Identify the product B.

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    13. Which of the following alkynes will not reacts with ammoniacal CuCl?

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    14. Pent-2-yne will yield on reductive ozonolysis.

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    15. Hept-3-yne reacts with to form a diketone

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    16. Like acetylene, the homologues of acetylene can also polymerize. Which...

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    17. Which of the followinig alkynes will produce isobutyric acid and CO2 o...

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    18. Which of the following reagents can distinguish between propene and pr...

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    19. Identify the product.

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