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Standard XII

Chemistry

Nucleophilic Addition at the Carbonyl

An excess of ...

Question

An excess of compound 'A' (molecular formula C₃H₈O) is treated with acidified potassium dichromate to form a product 'B' (molecular formula C₃H₆O). 'B' forms a shining silver mirror on warming with ammoniacal silver nitrate. 'B' when treated with an aqueous solution of H₂NCONHNH_2,HCl and sodium acetate, it gives a product 'C'. Identify the structure of 'C'

C H_{3} C H_{2} C H = N H N H C O N H_{2}

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C H_{3} C H_{2} C H = N C O N H N H_{2}

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Solution

The correct option is A $C H_{3} C H_{2} C H = N H N H C O N H_{2}$
A is an alcohol which on oxidation gives aldehyde or ketone (B). Because product (B) give silver mirror test so, it must be an aldehyde.

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Similar questions

Q. Compound '

A

' (molecular formula

C_{3} H_{8} O

is treated with acidified potassium dichromate to form a product '

B

' (molecular formula

C_{3} H_{6} O

). '

B

' forms a shining silver mirror on warming with ammoniacal silver nitrate. '

B

' when treated with an aqueous solution of

H_{2} N C O N H N H_{2}

and sodium acetate gives a product '

C

'. Identify the structure of '

C

Q. Compound

(A)

(molecular formula

C_{3} H_{8} O

) is treated with acidified potassium dichromate to form a product B (molecular formula

C_{3} H_{6} O

). 'B' forms a shining silver mirror on warming with ammoniacal silver nirate. 'B' when treated with an aqueous solution of

H_{2} N C O N H N H_{2} \cdot H C l

and sodium acetate gives a product 'C'. Identify the structure of 'C':

Q. Compound

^{'} A^{'}

(molecular formula

C_{3} H_{8} O

) is treated with acidified potassium dichromate to form a product

^{'} B^{'}

(molecular formula

C_{3} H_{6} O

^{'} B^{'}

forms a shining silver mirror on warming with ammoniacal silver nitrate.

^{'} B^{'}

when treated with an aqueous solution of

N H_{2} C O N H N H_{2}, H C l

and sodium acetate gives a product

^{'} C^{'}

. Identify the structure of

^{'} C^{'}

Q. Compound

A

(molecular formula

C_{3} H_{8} O

) is treated with acidified potassium dichromate to form a product

B

(molecular formula

C_{3} H_{6} O

B

forms a shining silver mirror on warming with ammoniacal silver nitrate.

B

when treated with an aqueous solution of

H_{2} N C O N H {N H}_{2} . H C l

and sodium acetate gives a product

C

Identify the structure of

C

Q. Compound

(X)

with molecular formula

C_{3} H_{8} O

is treated with acidified potassium dichromate to form a product

(Y)

with molecular formula

C_{3} H_{6} O

(Y)

does not form a shining silver mirror on warming with ammoniacal

A g N O_{3}

(Y)

when treated with an aqueous solution of

N H_{2} C O N H N H_{2}

H C l

and sodium acetate, gives a product

(Z)

. The structure of

(Z)

is:

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The correct option is A CH3CH2CH=NHNHCONH2A is an alcohol which on oxidation gives aldehyde or ketone (B). Because product (B) give silver mirror test so, it must be an aldehyde.

The correct option is A $C H_{3} C H_{2} C H = N H N H C O N H_{2}$
A is an alcohol which on oxidation gives aldehyde or ketone (B). Because product (B) give silver mirror test so, it must be an aldehyde.