An organic compound with molecular formula C 7 H 7 NO 2 exists in three isomeric forms, the isomer ' A ' has the highest melting point of the three. ' A ' on reduction gives compound ' B ' with molecular formula C 7 H 9 N . ' B ' on treatment with NaNO 2 / HCl at 0 - 5 ° C to form compound ' C '. On treating C with H 3 PO 2 , it gets converted to D with formula C 7 H 8 , which on further reaction with CrO 2 Cl 2 followed by hydrolysis forms ' E ' C 7 H 6 O . Write the structure of compounds A to E . Write the chemical equations involved.

An organic compound with molecular formula C 7 H 7 NO 2 exists in three isomeric forms, the isomer ' A ' has the highest melting point of the three. Amongst three isomers, para isomers have a high melting point than ortho and meta isomers because of the symmetry they have. They are packed into a lattice and are tough to melt and require high temperatures. The structure of compounds is as follows: Compound A is p-methylnitrobenzene. Its structure is: Compound B is p- methylbenzenamine. Its structure is: Compound C is p-methylbenzenediazoiumchloride. Its structure is: Compound D is Toluene. Its structure is: Compound E is Benzaldehyde. Its structure is: The chemical reactions is as follows:

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Write the structure of the product formed when acetone reacts with $2, 4 DNP$ reagent.

Important Questions on Aldehydes, Ketones and Carboxylic Acids

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12th CBSE

IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Exercise>Q 12

The hybridization of carbon in carbonyl carbon of carbonyl compound is:

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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Exercise>Q 13

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is

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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Exercise>Q 20

Aldol condensation reaction is not given by

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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Sample Paper>Q 56

Convert the following:

Bromobenzene to benzoic acid

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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Sample Paper>Q 57

Write the name of the reaction, structure and IUPAC name of the product formed when

{CH}_{3} {CH}_{2} CN

reacts with stannous chloride in the presence of hydrochloric acid followed by hydrolysis.

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IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Sample Paper>Q 58

You are given four organic compounds

“ A ”, “ B ”, “ C ”

and

“ D ”

. The compounds

“ A ”, “ B ”

and

“ C ”

form an orange- red precipitate with

2, 4 DNP

reagent. Compounds

“ A ”

and

“ B ”

reduce Tollen’s reagent while compounds

“ C ”

and

“ D ”

do not. Both

“ B ”

and

“ C ”

give a yellow precipitate when heated with iodine in the presence of

NaOH .

Compound

“ D ”

gives brisk effervescence with sodium bicarbonate solution. Identify

“ A ”, “ B ”, “ C ”

and

“ D ”

given the number of carbon atoms in three of these carbon compounds is three while one has two carbon atoms. Give an explanation for your answer.

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12th CBSE

IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Sample Paper>Q 59

An organic compound with molecular formula

C_{7} H_{7} {NO}_{2}

exists in three isomeric forms, the isomer '

A

' has the highest melting point of the three. '

A

' on reduction gives compound '

B

' with molecular formula

C_{7} H_{9} N

. '

B

' on treatment with

{NaNO}_{2} / HCl

0 - 5 ° C

to form compound '

C

'. On treating

C

with

H_{3} {PO}_{2}

, it gets converted to

D

with formula

C_{7} H_{8}

, which on further reaction with

{CrO}_{2} {Cl}_{2}

followed by hydrolysis forms '

E

C_{7} H_{6} O

. Write the structure of compounds

A

E

. Write the chemical equations involved.

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IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Aldehydes, Ketones and Carboxylic Acids>Sample Paper>Q 60

Arrange the following in decreasing boiling point.

{CH}_{3} COOH, C_{2} H_{5} OH, {CH}_{3} {NH}_{2}, {CH}_{3} {OCH}_{3}

Write the structure of the product formed when acetone reacts with 2,4 DNP reagent.

Important Questions on Aldehydes, Ketones and Carboxylic Acids

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Write the structure of the product formed when acetone reacts with $2, 4 DNP$ reagent.