Bharti Bhawan Chemistry Class 10 Students 2025

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Bharti Bhawan Chemistry Class 10. We covered all the Bharti Bhawan Chemistry Class 10 MCQs in this post for free so that you can practice well for the exam.

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Bharti Bhawan Chemistry Class 10 Objective for Students

In fructose, the possible optical isomers are:

(A) 15

(B) 16

(D) 8

Option d – 8

Which of the following is the sweetest sugar? ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Lactose

(B) Sucrose

(D) Glucose

Option c – Fructose

Starch is mainly present in:

(A) Roots

(B) Corns

(D) All of these

Option d – All of these

The sugar present in milk is called ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Maltose

(B) Sucrose

(D) Proteins

Option d – Proteins

Indigestible carbohydrate which is also a constituent of our diet:

(A) Sucrose

(B) Maltose

(D) Galactose

Option c – Cellulose

Blood sugar is the same as ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Glycogen

(B) Fructose

(D) Glucose

Option d – Glucose

After digestion, milk sugar changes to:

(A) Glucose

(B) Lactose

(D) Cellulose

Option a – Glucose

The calorific value is maximum in the case of ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Milk

(B) Proteins

(D) Minerals

Option c – Carbohydrates

All monosaccharides ………… Tollen’s reagent.

(A) Reduce

(B) Condense

(D) Eliminate

Option a – Reduce

Which one of the following is a chain-growth polymer? ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Starch

(B) Nucleic acid

(D) Protein

Option c – Polystyrene

Cellulose is a polymer of:

(A) Glucose

(B) Fructose

(D) Sucrose

Option a – Glucose

Which one of the following statements is not true? ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) In vulcanization, the formation of sulfur bridges between different chains makes rubber harder and stronger.

(B) Natural rubber has the trans-configuration at every double bond.

(D) Natural rubber is a 1,4-polymer of isoprene.

Option b – Natural rubber has the trans-configuration at every double bond

Ziegler-Natta catalyst is used in the preparation of:

(A) High-density polyethylene

(B) Low-density polyethylene

(D) PVC

Option d – PVC

Which one of the following is not a condensation polymer? ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Nylon-6,6

(B) Nylon-6

(D) Buna-S

Option d – Buna-S

Which of the following statements about low-density polyethylene is false?

(A) Its synthesis requires high pressure.

(B) It is a poor conductor of electricity.

(D) It is used in the manufacture of buckets, dust bins, etc.

Option d – It is used in the manufacture of buckets, dust bins, etc

On complete hydrogenation, natural rubber produces ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Ethylene propylene copolymer

(B) Vulcanized rubber

(D) Polybutylene

Option a – Ethylene propylene copolymer

The formation of which of the following polymers involves a hydrolysis reaction?

(A) Nylon 6,6

(B) Terylene

(D) Bakelite

Option c – Nylon 6

Of the following, which one is classified as a polyester polymer? ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Bakelite

(B) Melamine

(D) Terylene

Option d – Terylene

Which one of the following is used to make ‘non-stick cookware?

(A) PVC

(B) Polystyrene

(D) Polytetrafluoroethylene

Option d – Polytetrafluoroethylene

In elastomer, the intermolecular forces are ( Bharti Bhawan Chemistry Class 10 MCQ )

(A) Strong

(B) Weak

(D) None of the above

Option b – Weak

Bakelite is prepared by the reaction between:

(A) Urea and formaldehyde

(B) Ethylene glycol

(D) Tetramethylene glycol

Option c – Phenol and formaldehyde

Terylene is a condensation polymer of ethylene glycol and:

(A) Benzoic acid

(B) Phthalic acid

(D) Terephthalic acid

Option d – Terephthalic acid

Natural rubber is a polymer of:

(A) Butadiene

(B) Ethyne

(D) Isoprene

Option d – Isoprene

The linkage between two monosaccharides through oxygen is called:

(A) Glycosidic linkage

(B) Ethylenic linkage

(D) Amide linkage

Option a – Glycosidic linkage

Sucrose is:

(A) Optically inactive

(B) All rotatory

(D) Dextrorotatory

Option d – Dextrorotatory

Non-reducing sugars are called:

(A) Aldoses

(B) Ketoses

(D) Glycosides

Option d – Glycosides

Sucrose is a non-reducing sugar because:

(A) Reducing groups of glucose and fructose are involved in glycosidic linkage.

(B) Reducing groups are free.

(D) Reducing group of glucose is involved in glycosidic linkage.

Option a – Reducing groups of glucose and fructose are involved in glycosidic linkage

Hydrolysis of maltose gives two molecules:

(A) L-glucose

(B) D-glucose

(D) L-fructose

Option b – D-glucose

Lactose is a reducing sugar because:

(A) The hemiacetal group at C-2 of the glucose unit is not involved in glycosidic linkage but is free.

(B) The hemiacetal group at C-1 of the glucose unit is not involved in glycosidic linkage but is free.

(D) Oxidizing groups are involved.

Option b – The hemiacetal group at C-1 of the glucose unit is not involved in glycosidic linkage but is free

The principle component of plant structure is:

(A) Lactose

(B) Maltose

(D) Glucose

Option c – Cellulose

Which substance is an essential constituent of plant cell walls?

(A) Cellulose

(B) Sucrose

(D) Fructose

Option a – Cellulose

Monosaccharides must contain at least:

(A) 4 Carbons

(B) 3 Carbons

(D) 8 Carbons

Option b – 3 Carbons

Starch consists of two fractions which are:

(A) Glucose + fructose

(B) Glucose + galactose

(D) Amylopectin + fructose

Option c – Amylose + amylopectin

Amylose is soluble in water and forms a blue-colored complex with:

(A) Sulphur

(B) Oxygen

(D) Iodine

Option d – Iodine

Amylopectin is a water-insoluble component of starch which forms the following colored complex with iodine:

(A) Blue-yellow

(B) Blue-white

(D) Blue-red

Option c – Blue-violet

Which shows a similar structure to amylopectins?

(A) Glycogen

(B) Cellobiose

(D) Cellulose

Option a – Glycogen

Animal starch is:

(A) Glycose

(B) Glycogen

(D) Cellobiose

Option b – Glycogen

Ethanol is added in the hydrolysis of cane sugar to:

(A) Increase solubility of glucose

(B) Decrease rate of reaction

(D) Separate glucose from fructose

Option d – Separate glucose from fructose

Glucose is oxidized with Bromine water to give:

(A) n-Hexane

(B) Saccharic acid

(D) Gluconic acid

Option d – Gluconic acid

Glucose reacts with ethanoic anhydride to give:

(A) Glucose triacetate

(B) Glucose tetracetate

(D) Glucose hexacetate

Option c – Glucose pentaacetate

Carbohydrates containing only three asymmetric carbon atoms are:

(A) Xylose, fructose

(B) Erythrose, xylose

(D) Ribose, dihydroxyacetone

Option a – Xylose, fructose

Glucose and fructose are, respectively:

(A) Pentahydroxy aldehyde and pentahydroxy ketone

(B) Tetrahydroxy alcohol and pentahydroxy ketone

(D) Pentahydroxy ketone and pentahydroxy aldehyde

Option a – Pentahydroxy aldehyde and pentahydroxy ketone

Carbohydrates that, on hydrolysis, produce 2 to 10 units of monosaccharides are called:

(A) Sugars

(B) Monosaccharides

(D) Polysaccharides

Option c – Oligosaccharides

Carbohydrates are used by the body mainly

(A) As a source of energy

(B) For building muscles.

(D) For obtaining vitamins.

Option a – As a source of energy

Hydrolyzed solution of sucrose shows……. rotation, hence it is called

(A) Dextro, invert sugar

(B) Dextro, dextrose sugar

(D) Laevo, dextrose sugar

Option c – Laevo, invert sugar

Maltose is a reducing sugar because

(A) The hemiacetal group at C-1 of the second ring is not involved in glycosidic linkage.

(B) It does not contain glycosidic linkage.

(D) It contains a primary alcoholic -OH group.

Option a – The hemiacetal group at C-1 of the second ring is not involved in glycosidic linkage

The water-soluble component of starch is

(A) Amylose, which constitutes 20% of starch

(B) Amylose, which constitutes 80% of starch

(D) Amylose, which constitutes 40% of starch

Option a – Amylose, which constitutes 20% of starch

The water-insoluble component of starch is called

(A) Amylose, which constitutes about 20%

(B) Amylopectin, which constitutes about 80%

(D) Amylopectin, which constitutes about 65%

Option b – Amylopectin, which constitutes about 80%

Which is a branched-chain polymer?

(A) Lactose

(B) Cellulose

(D) Amylopectin

Option d – Amylopectin

Enzymes belong to which class of compounds?

(A) Hydrides

(B) Polynitrogen heterocyclic compounds

(D) Polypeptides

Option d – Polypeptides

By the action of enzymes, the rate of biochemical reaction

(A) Decreases

(B) Increases

(D) Either A or B

Option c – Do not change

Enzymes are

(A) Complex nitrogenous substances produced

(B) Living organisms

(D) All of the above

Option d – All of the above

Every living cell contains at least …….. different enzymes.

(A) 65

(B) 203

(D) 1000

Option d – 1000

Enzymes in the living systems

(A) Transport oxygen

(B) Provide energy

(D) Catalyze biological reactions

Option d – Catalyze biological reactions

Enzymes

(A) Consist of amino acids

(B) Accelerate biochemical reactions

(D) Have all these properties.

Option d – Have all these properties

Precipitation of proteins is called

(A) Reduction

(B) Polymerization

(D) Denaturation

Option d – Denaturation

The catalyst for various biochemical reactions in living organisms is called

(A) Hormones

(B) Proteins

(D) Carbohydrates

Option c – Enzymes

The conversion of maltose into glucose is catalyzed by

(A) Oxidase

(B) Maltase

(D) Invertase

Option b – Maltase

The name of the enzyme ends in the suffix

(A) -ane

(B) -ene

(D) -ase

Option d – -ase

Chemically enzymes are

(A) Fatty acids

(B) Proteins

(D) Minerals

Option b – Proteins

The synthesis of proteins is controlled by

(A) RNA

(B) DNA

(D) Hormones

Option b – DNA

The structure of the deoxyribonucleic acid molecule is a

(A) Branched-linear

(B) Triple helix

(D) Single helix

Option c – Double helix

Which is not a constituent of RNA?

(A) Phosphate

(B) Adenine

(D) Pyridine

Option d – Pyridine

Heredity is controlled by

(A) Enzymes

(B) Lipids

(D) Nucleic acids

Option d – Nucleic acids

Which is the backbone of nucleic acid

(A) Vitamin

(B) Polyamide

(D) Polynucleotide

Option d – Polynucleotide

A base-sugar-phosphoric acid unit is called

(A) Protein enzyme

(B) Enzyme protein

(D) Nucleoside

Option c – Nucleotide

A base-sugar unit is called

(A) Carbohydrate

(B) Nucleotide

(D) Protein-α-amino acid

Option c – Nucleotide

The bases present in nucleic acids are

(A) Aromatic amines

(B) Aromatic amides

(D) Pyrimidines, purines

Option d – Pyrimidines, purines

The base present in DNA but not in RNA is

(A) Uracil

(B) Thymine

(D) Uracil

Option b – Thymine

RNA is different from DNA because RNA contains

(A) Ribose sugar and uracil

(B) Deoxyribose sugar and uracil

(D) Deoxyribose sugar and thymine

Option a – Ribose sugar and uracil

DNA and RNA are chiral molecules. Their chirality is due to

(A) Chiral acids

(B) Chiral phosphate ester linkage

(D) D-sugar component

Option d – D-sugar component

Nucleic acids, both DNA and RNA are polymers of

(A) Nucleosides

(B) Nucleotides

(D) Aminoacids

Option b – Nucleotides

The function of deoxyribonucleic acid in an organism is

(A) To assists the synthesis of proteins and polypeptides

(B) To store information of heredity characteristics

(D) All of above

Option d – All of above

In nucleic acids the sequence is

(A) -Phosphate – Sugar – Base

(B) -Phosphate – Base – Sugar

(D) Base – Phosphate – Sugar

Option a – -Phosphate – Sugar – Base

Which substance is not present in nucleic acid?

(A) Adenine

(B) Uracil

(D) Guanidine

Option d – Guanidine

Which of the following is not present in nucleic acids?

(A) Cytosine

(B) Guanine

(D) 2-aminobenzoic acid

Option d – 2-aminobenzoic acid

Nitration of which of the following compounds is difficult

(A) Benzene

(B) Nitrobenzene

(D) Phenol

Option b – Nitrobenzene

Which of the following is used as a solvent in the Friedel-Crafts reaction

(A) Toluene

(B) Nitrobenzene

(D) Aniline

Option b – Nitrobenzene

Which of the following may be prepared by Gabriel’s phthalimide synthesis

(A) Aliphatic amines

(B) Aromatic amines

(D) Aromatic amides

Option a – Aliphatic amines

When an organic compound was treated with sodium nitrite and HCl in the ice-cold condition, nitrogen gas evolved. The compound is

(A) a nitro compound

(B) a primary amine

(D) a tertiary amine

Option b – a primary amine

How many products will be obtained when propane is subjected to vapor-phase nitration?

(A) 2

(B) 3

(D) 5

Option c – 4

Which of the following is not a primary amine?

(A) Aniline

(B) N-methyl cyclohexyl amine

(D) Ter-butyl amine

Option b – N-methyl cyclohexyl amine

In the Hoffmann’s method for the separation of 1º, 2°, and 3° amines, the reagent used is

(A) Acetyl chloride

(B) Benzene sulphonyl chloride

(D) Nitrous acid

Option c – Diethyl oxalate

The reduction of alkane nitriles with sodium and alcohol is called

(A) Rosenmund reduction

(B) Catalytic reduction

(D) Mendius reaction

Option d – Mendius reaction

Alkyl halide reacts with AgCN to form mainly:

(A) Alcohol

(B) Cyanide

(D) Both B and C

Option c – Isocyanide

Ethyl iodide in reaction with potassium nitrite gives

(A) Ethyl nitrite

(B) Nitroethane

(D) Acid

Option a – Ethyl nitrite

The alkane nitriles are isomeric with

(A) Primary alkanamines

(B) Secondary alkanamines

(D) Nitroalkanes

Option c – Alkyl isocyanides

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