SS3 third Term chemistry past questions and answers

SS3 third Term chemistry past questions and answers

SS3 chemistry questions with options and answers:

Question: What is the chemical symbol for mercury?

A) Me

B) Mg

C) Mn

D) Hg

Answer: D) Hg

Question: The study of the speed and mechanism of chemical reactions is called:

A) Thermodynamics

B) Kinetics

C) Quantum mechanics

D) Electrochemistry

Answer: B) Kinetics

Question: Which gas is produced during the process of respiration in living organisms?

A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) Hydrogen

Answer: C) Carbon dioxide

Question: The process of splitting water into hydrogen and oxygen using electricity is called:

A) Electrolysis

B) Condensation

C) Sublimation

D) Combustion

Answer: A) Electrolysis

Question: What is the chemical formula for hydrogen gas?

A) H2O

B) CO2

C) H2

D) CH4

Answer: C) H2

Question: The element with the highest electronegativity among the following is:

A) Sodium (Na)

B) Fluorine (F)

C) Aluminum (Al)

D) Potassium (K)

Answer: B) Fluorine

Question: What is the SI unit of energy?

A) Joule (J)

B) Watt (W)

C) Newton (N)

D) Pascal (Pa)

Answer: A) Joule (J)

Question: Which of the following is an example of a non-metal?

A) Sodium (Na)

B) Chlorine (Cl)

C) Copper (Cu)

D) Calcium (Ca)

Answer: B) Chlorine

Question: What is the chemical symbol for sodium?

A) So

B) Na

C) No

D) Ni

Answer: B) Na

Question: The process of changing from a solid directly to a gas is known as:

A) Melting

B) Sublimation

C) Condensation

D) Freezing

Answer: B) Sublimation

Question: Which of the following is a characteristic property of metals?

A) Brittleness

B) Dull appearance

C) Good conductivity of electricity

D) Low melting point

Answer: C) Good conductivity of electricity

Question: The chemical name for baking soda is:

A) Sodium chloride

B) Sodium bicarbonate

C) Sodium hydroxide

D) Sodium carbonate

Answer: B) Sodium bicarbonate

Question: What is the chemical formula for sulfuric acid?

A) H2SO3

B) H2SO4

C) HCl

D) HNO3

Answer: B) H2SO4

Question: Which gas is responsible for the color and smell of rotten fruits?

A) Oxygen

B) Methane

C) Ethylene

D) Hydrogen

Answer: C) Ethylene

Question: The process of converting a gas into a liquid is called:

A) Evaporation

B) Condensation

C) Sublimation

D) Freezing

Answer: B) Condensation

Question: What is the chemical symbol for phosphorus?

A) Pt

B) Pm

C) Ph

D) P

Answer: D) P

Question: The nucleus of an atom contains:

A) Protons and electrons

B) Neutrons and electrons

C) Protons and neutrons

D) Electrons and positrons

Answer: C) Protons and neutrons

Question: Which of the following is a halide ion?

A) Cl-

B) Na+

C) Ca2+

D) SO4^2-

Answer: A) Cl-

Question: What is the chemical formula for common table sugar (sucrose)?

A) C6H12O6

B) CH3COOH

C) C2H4O2

D) C12H22O11

Answer: D) C12H22O11

Question: The process of converting a liquid into a solid is called:

A) Evaporation

B) Condensation

C) Freezing

D) Sublimation

Answer: C) Freezing