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The best reagent to convert pent-3-en-2-...

The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is

A

pyridinium chlorochromate

B

chromic anhydride in glacial acetic acid

C

acidic dichromate

D

acidic permanganate

Text Solution

Verified by Experts

The correct Answer is:
B
`CH_(3)-underset(OH)underset("| ")"CH"-CH=CH-CH_(3) rarr CH_(3) - underset(O)underset("||")C-CH=CHCH_(3)`
The only suitable reagent is chromic anhydride in glacial acetic acid. Other will also affect `(C=C)` bond.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ALCOHOLS, PHENOLS AND ETHERS-PRACTICE EXERCISE (Exercise 2 (MISCELLANEOUS PROBLEMS))
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  2. When primary alcohol is oxidised with Cl(2), it gives

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  3. The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is

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  4. The acidic hydrolysis of ether (X) shown is fastest when

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  5. A compound soluble in conc. H(2)SO(4). It does not decolourise bromine...

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  6. Which one of the following is not expected to undergo iodoform reactio...

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  7. The correct order of boiling point for primary (1^(@)). Secondary (2^(...

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  8. When ethylene glycol is heated with acidified potassium permanganate, ...

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  9. The alcohol obtained by the hydrolysis of oils and fats is

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  10. When compound 'X' is oxidised by acidified potassium dichromate , comp...

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  11. Upon treatment with I(2) and aqueous NaOH, which of the following comp...

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  12. The products obtained when anisole is heated in a sealed tube with HI ...

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  13. In the reaction CH(3)overset(CH(3))overset(|)(C )H-CH(2)-O-CH(2)CH(3...

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  14. Which among the following compounds will give a secondary alcohol on r...

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  15. Ethylene oxide when treated with Grignared reagent yeild

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  16. Which of the following combination can be used to synthesise ethanol?

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  17. The reaction involved in the oil of winter green test is salicylic aci...

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  18. Salicylic acid is prepared from phenol by :

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  20. C(4)H(8)O(A) changes to 3^(@) alcohol by reduction with LiAlH(4). Thus...

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