SS3 first term Chemistry past questions and answers

SS3 first term Chemistry past questions and answers

Here are 20 SS3 chemistry questions with options and answers:

Question: What is the chemical symbol for gold?

A) Au

B) Ag

C) Fe

D) Hg

Answer: A) Au

Question: Which gas is responsible for the greenhouse effect?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide

Question: What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-9 M?

A) 7

B) 9

C) 5

D) 3

Answer: B) 9

Question: What is the chemical formula for water?

A) H2O2

B) CO2

C) H2O

D) CH4

Answer: C) H2O

Question: Which element is a noble gas?

A) Oxygen

B) Helium

C) Sodium

D) Chlorine

Answer: B) Helium

Question: What is the process of conversion of a gas into a liquid called?

A) Evaporation

B) Condensation

C) Sublimation

D) Melting

Answer: B) Condensation

Question: The atomic number represents the number of:

A) Neutrons

B) Electrons

C) Protons

D) Nucleons

Answer: C) Protons

Question: Which gas gives soda its fizz?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide

Question: What is the chemical symbol for iron?

A) I

B) Ir

C) Fe

D) In

Answer: C) Fe

Question: What is the formula for methane?

A) CH4

B) CO2

C) H2O

D) NH3

Answer: A) CH4

Question: Which of the following is a halogen?

A) Sodium (Na)

B) Fluorine (F)

C) Magnesium (Mg)

D) Aluminum (Al)

Answer: B) Fluorine

Question: What is the primary component of natural gas?

A) Methane

B) Ethane

C) Propane

D) Butane

Answer: A) Methane

Question: The process of rusting involves the formation of:

A) Copper oxide

B) Iron oxide

C) Aluminum oxide

D) Zinc oxide

Answer: B) Iron oxide

Question: What is the chemical formula for table salt?

A) NaCl

B) KCl

C) CaCl2

D) MgCl2

Answer: A) NaCl

Question: Which of the following is a greenhouse gas?

A) Nitrogen (N2)

B) Oxygen (O2)

C) Methane (CH4)

D) Hydrogen (H2)

Answer: C) Methane

Question: What is the SI unit of pressure?

A) Pascal (Pa)

B) Joule (J)

C) Newton (N)

D) Watt (W)

Answer: A) Pascal (Pa)

Question: The process of photosynthesis occurs in which part of a plant cell?

A) Nucleus

B) Chloroplast

C) Mitochondria

D) Endoplasmic reticulum

Answer: B) Chloroplast

Question: What is the chemical symbol for silver?

A) Au

B) Ag

C) Al

D) Si

Answer: B) Ag

Question: Which gas is produced during cellular respiration?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide

Question: What is the chemical formula for hydrogen peroxide?

A) H2O

B) H2O2

C) HO

D) H2CO3

Answer: B) H2O2