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7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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 1 View

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

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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 1 View

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. 

New answer posted

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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): Acylation of amines gives a monosubstituted product, whereas alkylation of amines gives polysubstituted product.

Reason (R): Acyl group steric

...more
0 Follower 3 Views

V
Vishal Baghel

Contributor-Level 10

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

Ans: (c)

In the acryl derivative, the delocalisation of electrons of the nitrogen atom occur over the carbonyl group, this decreases the electron density on the nitrogen atom that it no more perform as nucleophile and don't react with next acylating alkaline molecule. 

Therefore, Assertion statement is correct but reason is incorrect.

New answer posted

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

Match the following enzymes given in Column I with the reactions they catalyse given in Column II.

 
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A
alok kumar singh

Contributor-Level 10

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

(i) → (d) (ii) → (c) (iii) → (e) (iv) → (a) (v) → (b)

New answer posted

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

Match the vitamins given in Column I with the deficiency disease they cause given in Column II.

 
0 Follower 2 Views

A
alok kumar singh

Contributor-Level 10

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

  (i) → (c), (f) (ii) → (g) (iii) → (a) (iv) → (h) (v) → (d), (i) (vi) → (e), (vii) → (b)

New answer posted

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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
0 Follower 1 View

V
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

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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 '.
0 Follower 8 Views

V
Vishal Baghel

Contributor-Level 10

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

Ans:

 

New answer posted

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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.
0 Follower 4 Views

V
Vishal Baghel

Contributor-Level 10

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

Ans:

New answer posted

7 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.
0 Follower 3 Views

A
alok kumar singh

Contributor-Level 10

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

When an egg is cooked, the soluble globular protein albumin transforms into an insoluble fibrous protein. Bioactivity is lost throughout the denaturation process.

(ii) Albumin protein's secondary and tertiary structures are destroyed, but the primary structure (which contains the -amino acid sequence) is unaffected.

Although egg white is a fluid Ans, when it is cooked, the proteins get denatured and solidify as a result of coagulation.

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