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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

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

Ans: (ii)

Non-essential amino acids are amino acids that can be synthesized in the body and need not be taken from outside through diet. Glycine is an example of non-essential amino acids and is available in plenty of foods.

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Assertion: Deoxyribose, C₅H₁₀O₄ is not a carbohydrate.

Reason: Carbohydrates are hydrates of carbon so compounds which follow C₂(H₂O)g formula are carbohydrates.

(i) Assertion and reason both are correct statements and reason explains the assertion.

(ii) Both assertion and reason are wrong statements.

(iii) Assertion is correct statement and reason is wrong statement.

(iv) Assertion is wrong statement and reason is correct statement.

(v) Assertion and reason both are correct statements but reason does not explain assertion.

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

Contributor-Level 10

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

Ans: (ii)

When DNA (or RNA) is completely hydrolyzed, it produces a 5 carbon based sugar called pentose sugar, phosphoric acid, and nitrogen-containing heterocyclic molecules (called bases). The sugar moiety of the nucleic acid, DNA is β−D−2− deoxyribose. Therefore, both assertion and reason are wrong statements.

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10 months ago

Assertion: All naturally occurring α− amino acids except glycine are optically active.

Reason: Most naturally occurring amino acids have L- configuration.

(i) Assertion and reason both are correct statements and reason explains the assertion.

(ii) Both assertion and reason are wrong statements.

(iii) Assertion is correct statement and reason is wrong statement.

(iv) Assertion is wrong statement and reason is correct statement.

(v) Assertion and reason both are correct statements but reason does not explain assertion.

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

Contributor-Level 10

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

Ans: (v)

All other naturally occurring alpha-amino acids, with the exception of glycine, are optically active due to the asymmetry of the α - carbon atom. Both of these ' D ' and ' L ' configurations are available. The majority of amino acids found in nature have a L− configuration. The group on the left side is used to designate L− amino acids.

naturally occurring amino acids have a configuration. The −NH₂ group on the left side is used to indicate amino acids.

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10 months ago

Assertion: ? - glycosidic linkage is present in maltose.

Reason: Maltose is composed of two glucose units in which C−1 of one glucose unit is linked to C−4 of another glucose unit.

(i) Assertion and reason both are correct statements and reason explains the assertion.

(ii) Both assertion and reason are wrong statements.

(iii) Assertion is correct statement and reason is wrong statement.

(iv) Assertion is wrong statement and reason is correct statement.

(v) Assertion and reason both are correct statements but reason does not explain assertion.

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

Contributor-Level 10

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

Ans: (iv)

Maltose is made up of two? D? glucose units, one of which, C?1, is coupled to the C?4 of the other one. As a result, maltose contains a? glycosidic linkage. As a result, the assertion is a false statement, but the reason is true.

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10 months ago

Predict the reagent or the product in the following reaction sequence.

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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

Ans:

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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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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

Contributor-Level 10

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

Ans:

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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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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

Contributor-Level 10

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

Ans:

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10 months ago

Assertion: Vitamin D can be stored in our body.

Reason: Vitamin D is fat soluble vitamin.

(i) Assertion and reason both are correct statements and reason explains the assertion.

(ii) Both assertion and reason are wrong statements.

(iii) Assertion is correct statement and reason is wrong statement.

(iv) Assertion is wrong statement and reason is correct statement.

(v) Assertion and reason both are correct statements but reason does not explain assertion.

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

Contributor-Level 10

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

Ans: (i)

Vitamins that are fat soluble are soluble in fats and oils but insoluble in water. They can be stored in the liver as well as adipose (fat-storing) tissues and are not excreted in urine . As a result, both assertion and reason are true assertions, and reason clarifies the assertion.

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10 months ago

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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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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.

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10 months ago

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

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

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

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.

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Assertion: D(+)− Glucose is dextrorotatory in nature.

Reason: ' D ' represents its dextrorotatory nature.

(i) Assertion and reason both are correct statements and reason explains the assertion.

(ii) Both assertion and reason are wrong statements.

(iii) Assertion is correct statement and reason is wrong statement.

(iv) Assertion is wrong statement and reason is correct statement.

(v) Assertion and reason both are correct statements but reason does not explain

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

Contributor-Level 10

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

Ans: (iii)

Because D (+) - glucose causes plane polarised light to rotate to the right, it is

dextrorotatory. D denotes the relative configuration of glucose in regard to

glyceraldehyde in this situation. As a result, assertion is the proper statement, while

reason is the incorrect statement.

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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

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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.

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

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

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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.

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

Reason (R): Hydrogen attached to nitrogen in sulphonamide is strongly acidic.

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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.

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Assertion (A): Hofmann’s bromamide reaction is given by primary amines. Reason (R): Primary amines are more basic than secondary amines.

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Exemplar Solution Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

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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10 months ago

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

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Chouksey Engineering College Chouksey Engineering College Placement

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.

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10 months ago

What is the average package offered at Chouksey Engineering College?

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Shoaib Mehdi

Contributor-Level 10

As per the latest report, the average package offered during Chouksey Engineering College placements in 2025 stood at INR 5 LPA. The same is tabulated below:

Particulars	Placement Statistics (2025)
Average package	INR 5 LPA

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Exemplar Solution 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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