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Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

Match the compounds given in Column I with the items given in Column II.

Column I

Column II

(i) Benzene sulphonyl chloride

(a) Zwitter ion

(ii) Sulphanilic acid

(B) Hinsberg reagent

(iii) Alkyl diazonium salts

(c) Dyes

(iv) Aryl diazonium salts

(d) Conversion to alcohols
0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

 Ans: (i)- (b), (ii)- (a), (iii)- (d), (iv)- (c)

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

Match the reactions given in Column I with the statements given in Column II. 

Column I

Column II

(i) Ammonolysis

(a) Amine wth lesser number of carbon atoms

(ii)Gabriel phthalimide synthesis

(b) Detection test for primary amines.

(iii) Hoffmann Bromide reaction

(c) Reaction of phthalimide with KOH and R-X

(iv) Carbylamine reaction

(d) Reaction of aljylhalides with NH3
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Vishal Baghel

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

Ans: (i)- (d), (ii)- (c), (iii)- (a), (iv)- (b)

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

A colourless substance ' A′(C6H7 N) is sparingly soluble in water and gives a water soluble compound ' B ' on treatment with mineral acid. On reacting with CHCl3 and alcoholic potash 'A' produces an obnoxious smell due to the formation of compound ' C '. Reaction of 'A' with benzenesulphonyl chloride gives compound ' D ' which is soluble in alkali. With NaNO2 and, ' A ' forms compound ' E ' which reacts with phenol in alkaline medium to give an orange dye ' F ' Identify compounds ' A ' to ' F '.
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Vishal Baghel

Contributor-Level 10

This is a Long Answer Type Questions as classified in NCERT Exemplar

Ans:

 

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

A hydrocarbon ' A ', (C4H8) on reaction with HCl gives a compound ' B ' (C4H9Cl), which on reaction with 1 mol of NH3 gives compound ' C ', (C4H11 N). On reacting with NaNO2 and HCl followed by treatment with water, compound ' C ' yields an optically active alcohol, ' D '. Ozonolysis of ' A ' gives 2 moles of acetaldehyde. Identify compounds 'A' to 'D'. Explain the reactions involved.
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Vishal Baghel

Contributor-Level 10

This is a Long Answer Type Questions as classified in NCERT Exemplar

Ans:

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
(a) Both Assertion and Reason are wrong.
(B) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(c) Assertion is correct but Reason is wrong.
(d) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(e) Assertion is wrong but Reason is correct.

Assertion (A): Acetanilide is less basic than aniline.

Reason (R): Acetylation of aniline results in decrease of electron density on nitrogen.
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Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: (d) 

Acetanilide is less basic than aniline because electron density of nitrogen is lowered by acetyl group.

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
(a) Both Assertion and Reason are wrong.
(B) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(c) Assertion is correct but Reason is wrong.
(d) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(e) Assertion is wrong but Reason is correct.

Assertion (A): Aromatic 1° amines can be prepared by Gabriel phthalimide synthesis.

Reason (R): Aryl halides undergo nucleophilic substitution with anion formed

...more
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Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: (a)

Aromatic primary amines cannot be prepared using Gabriel phthalimide synthesis as aryl halides do not undergo nucleophilic substitution with anion formed by phthalimide. Both the statement's assertion and reason are incorrect, hence the correct answer is a.

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
(a) Both Assertion and Reason are wrong.
(B) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(c) Assertion is correct but Reason is wrong.
(d) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(e) Assertion is wrong but Reason is correct.

Assertion (A): Only a small amount of HCl is required in the reduction of nitro compounds with iron scrap and HCl in the presence of steam.

Reason (R): FeCl2 form

...more
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Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: (d)

Fe+2HCl→FeCl2+2 [H] FeCl2+H2O (g)→FeO+2HCl

The nascent hydrogen formed act as reducing agent for the reduction of nitro compounds.

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
(a) Both Assertion and Reason are wrong.
(B) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(c) Assertion is correct but Reason is wrong.
(d) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(e) Assertion is wrong but Reason is correct.

Assertion (A): N, N-diethylbenzene sulphonamide is insoluble in alkali. 

Reason (R): Sulphonyl group attached to nitrogen atom is strong electron withdrawing

...more
0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: (b)

N, N-die ethyl benzene sulphonamide, there is no acidic hydrogen present on the N-atom which can make it soluble. Therefore, it is insoluble in alkali. 

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
(a) Both Assertion and Reason are wrong.
(B) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(c) Assertion is correct but Reason is wrong.
(d) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(e) Assertion is wrong but Reason is correct.

Assertion (A): N-Ethylbenzene sulphonamide is soluble in alkali.

Reason (R): Hydrogen attached to nitrogen in sulphonamide is strongly acidic.
0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: (d)

Ethylbenzene sulphonamide is soluble in alkali because it has acidic hydrogen.

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen Exemplar Solution

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
(a) Both Assertion and Reason are wrong.
(B) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(c) Assertion is correct but Reason is wrong.
(d) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(e) Assertion is wrong but Reason is correct.

Assertion (A): Hofmann's bromamide reaction is given by primary amines. Reason (R): Primary amines are more basic than secondary amines.
0 Follower 4 Views

V
Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: (a)

In Hoffmann bromamide degradation reaction as in this reaction primary amide group is treated with halogen first bromine then the halogen substituted amide product is coverts to primary amine with the release of carbon dioxide gas. Both the statements assertion and reason are incorrect therefore the correct option is a. 

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