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Among H-CHO,CH(3)CHOandC(6)H(5)CHO which...

Among H-`CHO,CH_(3)CHOandC_(6)H_(5)CHO` which will undergo Cannizaro's reaction?

A

`HCHO and CH_(3)-CHO`

B

`CH_(3)-CHOandC_(6)H_(5)CHO`

C

`C_(6)H_(5)CHOandHCHO`

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
C
Cannizaro reaction is possibel in those aldehyde where the `alpha`- hydrogen atoms are absent.
e.g. `HCHO, C_(6)CHO`
`2HCHO overset(NaOH) underset(Delta)to HCO overset(-)O overset(+)Na+CH_(3)OH`
`2C_(6)H_(5)CHO overset(NaOH) underset(Delta)to C_(6)H_(5)CH_(2)OH+C_(6)H_(5) CO overset(-)O overset(+)Na`
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Aldehydes undergo disproportionation reaction in presence of aqueous NaOH. Simultaneous oxidation and reduction of a compound is scientifically called as disproportionatio. Aldehydes having no alpha - hydrogen show this reaction called Cannizzaro's reactio. Few exceptions are also there to this generalisation. The reaction may be represented as : C_(6)H_(5)CHO+C_(6)H_(5)CHOoverset(NaOH)underset(Delta)rarrC_(6)H_(5)COONa+C_(6)H_(5)CH_(2)OH Intramolecular Carrizzaro's reaction is also possible. The product formed in the following reaction will be : underset(CHO)overset(CHO)|overset(NaOH)rarr"Product"

CH_(3)CHO and C_(6)H_(5)CH_(2)CHO can be distiguished chemically by

For distinct between CH_(3)CHO and C_(6)H_(5)CHO , the used regent is

CH_(2)CHO and C_(6)H_(5)CH_(2)CHO can be distinguished chemically by

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ALDEHYDES, KETONES AND CARBOXYLIC ACIDS-MHT CET CORNER
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  2. Which of the following carboxylic acids is a tricarboxylic acid?

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  3. R-CNunderset(HCl)overset(SnCl(2))(to)" "overset(H(3)O^(o+))(to)R-C...

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  5. Which of the following compounds is most acidic in nature ?

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  6. Write the IUPAC name of following cmpound.

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  7. Identify to compound D in above mentioned series of reaction.

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  8. Which of the following reactions does not produce benzaldehyde as end ...

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  10. Which of the following acids does not contain -COOH group ?

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  11. Aldol condensation product of acetone on dehydration gives

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  12. In the following reaction sequence, CH3CHO underset(Ca(OH)2)overset(Cl...

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  13. Among the following, the formula of saturated fatty acids is

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  15. CH(3)COOH when reacts with C(2)H(2)OH gives a product. The same produc...

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  17. Which does not react with Fehling's solution?

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  18. Which of the acids cannot be prepared by Grignard reagent ?

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  19. Vinegar contains :

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  20. Vinegar is an aqueous solution of

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  21. The aldol condensationof acetaldehyde results in the formation of :

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