Chemistry Jamb Past Questions and Answers

Chemistry Jamb Past Questions and Answers

What is the chemical formula for table salt?

A) NaCl

B) H2O

C) CO2

D) CH4

Answer: A) NaCl

Which of the following is a transition metal?

A) Sodium

B) Iron

C) Chlorine

D) Fluorine

Answer: B) Iron

What is the common name for hydrogen peroxide?

A) Bleach

B) Peroxide

C) Hydroperoxide

D) Water

Answer: B) Peroxide

Which element is the most abundant in the Earth's crust?

A) Oxygen

B) Silicon

C) Aluminum

D) Iron

Answer: A) Oxygen

What is the chemical formula for ammonia?

A) NH3

B) N2

C) HNO3

D) NO2

Answer: A) NH3

Which gas is produced during photosynthesis?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: A) Oxygen

What is the name of the process where a substance changes directly from a solid to a gas?

A) Melting

B) Sublimation

C) Evaporation

D) Condensation

Answer: B) Sublimation

Which of the following is a non-metal?

A) Sodium

B) Chlorine

C) Calcium

D) Iron

Answer: B) Chlorine

What is the molecular formula for glucose?

A) C6H12O6

B) CH4

C) H2O

D) CO2

Answer: A) C6H12O6

What is the SI unit for temperature in the Kelvin scale?

A) Celsius

B) Fahrenheit

C) Kelvin

D) Rankine

Answer: C) Kelvin

Which gas is responsible for the unpleasant smell of rotten eggs?

A) Oxygen

B) Hydrogen

C) Sulfur dioxide

D) Methane

Answer: C) Sulfur dioxide

What is the chemical formula for vinegar?

A) HCl

B) NaOH

C) CH3COOH

D) H2SO4

Answer: C) CH3COOH

Which element is essential for the structure of bones and teeth?

A) Iron

B) Calcium

C) Phosphorus

D) Magnesium

Answer: B) Calcium

What is the name of the process where a liquid turns into a gas at its boiling point?

A) Melting

B) Evaporation

C) Condensation

D) Boiling

Answer: D) Boiling

Which law states that the volume of a gas is inversely proportional to its pressure, assuming constant temperature?

A) Boyle's Law

B) Charles's Law

C) Avogadro's Law

D) Dalton's Law

Answer: A) Boyle's Law

What is the chemical symbol for silver?

A) Ag

B) Au

C) Al

D) Si

Answer: A) Ag

Which type of reaction involves the exchange of ions between two compounds?

A) Synthesis

B) Decomposition

C) Single Replacement

D) Double Replacement

Answer: D) Double Replacement

What is the pH range for acids?

A) 0-7

B) 7-14

C) 0-14

D) 1-14

Answer: A) 0-7

Which of the following is a halide ion?

A) Cl-

B) Na+

C) SO4^2-

D) HCO3-

Answer: A) Cl-

What is the main component of natural gas?

A) Methane

B) Ethane

C) Propane

D) Butane

Answer: A) Methane