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Which of the following reagent cannot be...

Which of the following reagent cannot be used to oxidize primary alcohols to aldehydes ?

A

`CrO_3` in anhydrous medium.

B

`KMnO_4` in acidic medium

C

Pyridinium chlorochromate.

D

Heat in the presence of Cu at 573K.

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-ALCOHOLS, PHENOLS AND ETHERS-ALCOHOL (OBJECTIVE EXERCISE-1 (PROPERTIES AND USES))
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  2. Which of the following reagent cannot be used to oxidize primary alcoh...

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  3. 23 g of sodium will react with methanol to give

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  4. Which of the following alcohols is the strongest acid ?

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  5. The correct order of decreasing basicity of the following species is :...

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  6. Which of the following alcohols is expected to have the lowest pK(a) v...

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  7. When 2-butanol is heated with an excess of concentrated sulphuric acid...

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  8. When a mixture, containing PCl3 and PCl5 is heated with ethyl alcohol ...

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  9. When vapour of an alcohol are passed over hot reduced copper, it gives...

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  10. Acid catalyzed hydration of alkenes except ethane leads to the formati...

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  11. The bond cleavages during esterification reaction between (A) =CH3 C...

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  12. Which one of the following compounds is most acidic?

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  13. Order of esterification of alcohols is

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  14. Complete the missing links.

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  15. The alcohol which easily reacts with con HCl is

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  16. CH3CH2OH overset(P+I1)(to) A overset(Mg)(to) B overset(HCHO)(to) C ove...

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  17. correct order of 1^@ , 2^@ and 3^@ reactivity of and alcohols towards...

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  18. A better reagent for oxidation of primary alcohols to aldehydes in goo...

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  19. Identity (Z) in the reaction series, CH2 = CH2 overset(HBr)(to) (X) ov...

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  20. The correct order of reactivity of hydrogen halides with ethyl alcoho...

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