MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 1

The pair of compounds in which both the compounds give positive test with Tollen’s reagent is

A.
Glucose and Sucrose
B.
Fructose and Sucrose
C.
Acetophenone and Hexanal
D.
Glucose and Fructose

Detailed Solution: Question 1

Glucose being an aldose responds to Tollen’s test while fructose, although a ketose, undergoes rearrangement in presence of basic medium (provided by Tollen’s reagent) to form glucose, which then responds to Tollen’s test.

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 2

The two forms of D-glucopyranose obtained from the solution of D-glucose are called

A.
Isomers
B.
Anomers
C.
Epimers
D.
Enantiomers

Detailed Solution: Question 2

The two is omeric forms (a – and b –) of D-glucopyronose differ in configuration only at C– 1; hence these are called anomers.

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Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 3

Cellulose upon acetylation with excess acetic anhydride/ H₂SO₄ (catalytic) gives cellulose triacetate whose structure is

Detailed Solution: Question 3

Cellulose is a polysaccharide composed of only Dglucose units. Every adjacent glucose units are joined by β-glycosidic linkage between C₁ of one glucose and C₄ of the next.
NOTE : Thus in every glucose units only three –OH groups are free to form triacetate.

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 4

Among cellulose, poly (vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is

A.
Nylon
B.
Poly (vinyl chloride)
C.
Cellulose
D.
Natural Rubber

Detailed Solution: Question 4

Nylon and cellulose, both have in termolecular hydrogen bonding, polyvinyl chloride has dipoledipole interaction, while natural rubber has van der Waal forces which are weakest.

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 5

The correct statement about the following disaccharide is

A.
Ring (A) is pyranose with a - glycosidic link
B.
Ring (A) is furanose with α - glycosidic link
C.
Ring (B) is furanose with α - glycosidic link
D.
Ring (B) is pyranose with β - glycosidic link

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 6

The following carbohydrate is

A.
a ketohexose
B.
an aldohexose
C.
an α-furanose
D.
an α-pyranose

Detailed Solution: Question 6

It is a β-pyranose hence it is an aldohexose.

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 7

On complete hydrogenation, natural rubber produces

A.
ethylene–propylene copolymer
B.
vulcanised rubber
C.
polypr opylene
D.
polybutylene

Detailed Solution: Question 7

*Multiple options can be correct

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 8

The correct statement(s) about the following sugars X and Y is(are)

A.
X is a reducing sugar and Y is a non-reducing sugar
B.
X is a non-reducing sugar and Y is a reducing sugar
C.
The glucosidic linkages in X and Y are α and β, respectively
D.
The glucosidic linkages in X and Y are β and α, respectively

Detailed Solution: Question 8

We know that carbohydrates having acetal linkage are non-reducing while that with hemiacetal linkage are reducing. In the give structure,

X has acetal linkage, hence non-reducing.
Y has hemiacetal linkage, hence reducing.
Further X is a-anomer, while Y is β-anomer of D-(+)-glucose.

*Multiple options can be correct

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 9

The correct functional group X and the reagent/reaction conditions Y in the following scheme are

A.
X = COOCH₃, Y = H₂/Ni/heat
B.
X = CONH₂, Y = H₂/Ni/heat
C.
X = CONH₂, Y = Br₂/NaOH
D.
X = CN, Y = H₂/Ni/heat

Detailed Solution: Question 9

Condensation polymers are formed by condensation of a diol or diamine with a dicarboxylic acid.

*Multiple options can be correct

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 10

The structure of D-(+)-glucose is
The structure of L-(–)-glucose is

Detailed Solution: Question 10

*Multiple options can be correct

Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced - Question 11

For ‘invert sugar’, the correct statement(s) is(are)
(Given : specific rotations of (+) -sucrose, (+)-maltose, L-(-)-glucose and L-(+) fructose in aqueous solution are + 66°, +140°, –52° and +92°, respectively)

A.
‘invert sugar’ is prepared by acid catalyzed hydrolysis of maltose
B.
‘invert sugar’ is an equimolar mixture of D-(+)-glucose and D-(-)-fructose
C.
specific rotation of ‘invert sugar’ is –20°
D.
on reaction with Br₂ water, ‘invert sugar ’ forms saccharic acid as one of the products

Detailed Solution: Question 11

Invert sugar is an equimolar mixture of D-(+) glucose and D(–) glucose.

• Specific rotation of invert sugar =

• D-glucose on oxidation with Br₂-water pr oduces gluconic acid and not saccharic acid.

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MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers

MCQ Practice Test & Solutions: Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced (11 Questions)

The pair of compounds in which both the compounds give positive test with Tollen’s reagent is

The two forms of D-glucopyranose obtained from the solution of D-glucose are called

Cellulose upon acetylation with excess acetic anhydride/ H₂SO₄ (catalytic) gives cellulose triacetate whose structure is

Among cellulose, poly (vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is

The correct statement about the following disaccharide is

The following carbohydrate is

On complete hydrogenation, natural rubber produces

The correct statement(s) about the following sugars X and Y is(are)

The correct functional group X and the reagent/reaction conditions Y in the following scheme are

The structure of D-(+)-glucose is
The structure of L-(–)-glucose is

For ‘invert sugar’, the correct statement(s) is(are)
(Given : specific rotations of (+) -sucrose, (+)-maltose, L-(-)-glucose and L-(+) fructose in aqueous solution are + 66°, +140°, –52° and +92°, respectively)

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MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers

MCQ Practice Test & Solutions: Test: MCQs (One or More Correct Option): Carbohydrates, Amino Acids, Polymers & Miscellaneous | JEE Advanced (11 Questions)

The pair of compounds in which both the compounds give positive test with Tollen’s reagent is

The two forms of D-glucopyranose obtained from the solution of D-glucose are called

Cellulose upon acetylation with excess acetic anhydride/ H2SO4 (catalytic) gives cellulose triacetate whose structure is

Among cellulose, poly (vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is

The correct statement about the following disaccharide is

The following carbohydrate is

On complete hydrogenation, natural rubber produces

The correct statement(s) about the following sugars X and Y is(are)

The correct functional group X and the reagent/reaction conditions Y in the following scheme are

The structure of D-(+)-glucose isThe structure of L-(–)-glucose is

For ‘invert sugar’, the correct statement(s) is(are) (Given : specific rotations of (+) -sucrose, (+)-maltose, L-(-)-glucose and L-(+) fructose in aqueous solution are + 66°, +140°, –52° and +92°, respectively)

Crack JEE with 35 Years of Previous Year Solved Papers

Crack JEE with 35 Years of Previous Year Solved Papers

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About this JEE Practice Test

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Cellulose upon acetylation with excess acetic anhydride/ H₂SO₄ (catalytic) gives cellulose triacetate whose structure is

The structure of D-(+)-glucose is
The structure of L-(–)-glucose is

For ‘invert sugar’, the correct statement(s) is(are)
(Given : specific rotations of (+) -sucrose, (+)-maltose, L-(-)-glucose and L-(+) fructose in aqueous solution are + 66°, +140°, –52° and +92°, respectively)