CBSE 12 Chemistry Question Paper-2020 Set-2 by Pavan | Practice Test to Test Your Knowledge
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  3. CBSE 12 Chemistry Question Paper-2020 Set-2
CBSE 12 Chemistry Question Paper-2020 Set-2

CBSE 12 Chemistry Question Paper-2020 Set-2

This mock test includes actual CBSE Class 12 Science board exam questions from the year 2020 set-2, helping students understand exam trends and practice real paper format

2025-08-07
Pavan Pavan
CBSE Class 12 Chemistry 2020 Grade 12

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

What are amino acids?

A
Substances responsible for transmitting nerve impulses
B
Compounds formed by condensation of amino groups
C
Compounds containing amine as a functional group
D
Proteins used in the formation of cell membranes

Why are amino acids amphoteric?

A
Because they are aromatic compounds
B
Because they contain both acidic and basic functional groups
C
Because they are non-polar compounds
D
Because they only contain nitrogen

Give one point of difference between acidic and basic amino acid.

A
Acidic amino acids are hydrophobic, basic amino acids are hydrophilic
B
Acidic amino acids have carboxyl groups, basic amino acids have amino groups
C
Acidic amino acids form polypeptides, basic amino acids do not
D
Acidic amino acids are positively charged, basic amino acids are negatively charged

What are essential amino acids?

A
Amino acids that are required for energy production
B
Amino acids that are synthesized only in the liver
C
Amino acids found only in animal proteins
D
Amino acids that the body cannot synthesize

Name the linkage formed when the carboxyl end of one amino acid condenses with the amino end of another amino acid.

A
Hydrogen bond
B
Ester bond
C
Peptide bond
D
Disulfide bond

What is the function of hemoglobin?

A
To transport oxygen in the blood
B
To break down toxins in the liver
C
To produce energy for muscle contraction
D
To regulate body temperature

Which of the following is an example of a lipid?

A
Glucose
B
Cellulose
C
Cholesterol
D
Amino acids

What type of bond holds together two amino acids?

A
Peptide bond
B
Covalent bond
C
Ionic bond
D
Hydrogen bond

Which of the following compounds is an enzyme?

A
Amylase
B
Glucose
C
Sucrose
D
Cellulose

Which of the following is a characteristic of water?

A
It is a poor solvent
B
It has a high heat capacity
C
It is non-polar
D
It is not cohesive

What does the term 'isomerism' refer to?

A
Compounds with the same molecular formula but different structures
B
Compounds that are identical in all respects
C
Compounds that are chemically reactive
D
Compounds that form salts

What is the primary function of the mitochondria?

A
To produce proteins
B
To provide energy through ATP
C
To store genetic information
D
To control cellular activities

Which of the following is an organic compound?

A
Carbon dioxide
B
Water
C
Methane
D
Oxygen

What is the chemical formula for glucose?

A
C6H12O6
B
C6H10O5
C
C5H10O5
D
C6H12O5

Which of the following is true about a catalyst?

A
It increases the activation energy
B
It decreases the activation energy
C
It is consumed in the reaction
D
It is used up in the reaction

What is the product of the reaction between an acid and a base?

A
Salt and water
B
Salt and hydrogen
C
Water and oxygen
D
Hydrogen and nitrogen

Which of the following is a noble gas?

A
Argon
B
Oxygen
C
Hydrogen
D
Nitrogen

Which of the following compounds is ionic?

A
Sodium chloride
B
Methane
C
Oxygen
D
Carbon dioxide

Which of the following statements is true about exothermic reactions?

A
They release heat
B
They absorb heat
C
They do not involve energy changes
D
They do not require activation energy

Which gas is produced during the electrolysis of water?

A
Oxygen
B
Hydrogen
C
Nitrogen
D
Carbon dioxide

What is the main function of ribosomes?

A
To synthesize proteins
B
To store genetic information
C
To produce energy
D
To regulate cell division

Which of the following is an example of a monosaccharide?

A
Glucose
B
Sucrose
C
Fructose
D
Lactose

What is the atomic number of nitrogen?

A
8
B
7
C
6
D
9

Which of the following is the formula for methane?

A
CH4
B
C2H6
C
CO2
D
C3H8

Which is the most abundant gas in Earth's atmosphere?

A
Oxygen
B
Carbon dioxide
C
Nitrogen
D
Hydrogen

What is the pH value of pure water?

A
7
B
6
C
8
D
5

What type of reaction is the combination of hydrogen and oxygen to form water?

A
Exothermic reaction
B
Endothermic reaction
C
Redox reaction
D
Displacement reaction

Which element is commonly used as a semiconductor?

A
Silicon
B
Aluminum
C
Iron
D
Copper

What is the chemical formula of sulfuric acid?

A
H2SO4
B
HCl
C
HNO3
D
CH3COOH

What is the chemical bond between two non-metals called?

A
Ionic bond
B
Covalent bond
C
Metallic bond
D
Hydrogen bond