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Which of the following reagents can form...

Which of the following reagents can form a hydrazone with alkanone?

A

`NH_(3)OHCl`

B

`PhNHNH_(2)`

C

`NH_(2)NHCONH_(2)`

D

HCN

Text Solution

Verified by Experts

The correct Answer is:
B
Hydrazines react with alkanones to given an additiion- elmination reaction and hydrazones are obtained.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ALDEHYDES, KETONES AND CARBOXYLIC ACIDS-MHT CET CORNER
  1. Which of the following reagents can form a hydrazone with alkanone?

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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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  4. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaO...

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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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  9. Structure of the compound whose IUPAC name is 3-ethyl-2-hydroxy-4-meth...

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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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  14. Ethyl methyl ketone is obtained by heating calcium salts of

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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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  16. The IUPAC name of crotonaldehyde is

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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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