SS3 Third Term Chemistry Past Questions And Answers

Here are 20 Past questions each accompanied by multiple-choice options. These questions encompass various aspects of Chemistry, aiming to challenge and reinforce students’ comprehension.

 

Question: What is the chemical formula for hydrogen peroxide?

 

A) H2O

B) H2O2

C) HO

D) H3O

Answer: B) H2O2

Question: Which element is a halogen?

 

A) Sodium

B) Chlorine

C) Potassium

D) Calcium

Answer: B) Chlorine

Question: What is the molecular formula for glucose?

 

A) C6H12O6

B) C2H5OH

C) CH3COOH

D) CO2

Answer: A) C6H12O6

Question: In the pH scale, a solution with a pH of 9 is considered:

 

A) Neutral

B) Acidic

C) Basic

D) Alkaline

Answer: C) Basic

Question: What is the chemical symbol for lead?

 

A) Pb

B) Li

C) Pt

D) Po

Answer: A) Pb

Question: What is the SI unit of temperature?

 

A) Celsius

B) Fahrenheit

C) Kelvin

D) Rankine

Answer: C) Kelvin

Question: Which gas is responsible for the “pop” sound in a squeaky pop test for hydrogen?

 

A) Oxygen

B) Hydrogen

C) Helium

D) Nitrogen

Answer: B) Hydrogen

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

 

A) Condensation

B) Evaporation

C) Sublimation

D) Melting

Answer: A) Condensation

Question: Which law states that the total pressure of a mixture of gases is the sum of their partial pressures?

 

A) Boyle’s law

B) Dalton’s law

C) Avogadro’s law

D) Gay-Lussac’s law

Answer: B) Dalton’s law

Question: What is the chemical formula for sodium hydroxide?

 

A) NaOH

B) H2SO4

C) KOH

D) Ca(OH)2

Answer: A) NaOH

Question: Which element is a noble gas?

 

A) Neon

B) Fluorine

C) Sodium

D) Potassium

Answer: A) Neon

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

 

A) Salt and water

B) Gas and water

C) Metal and non-metal

D) Alcohol and acid

Answer: A) Salt and water

Question: Which type of radiation consists of particles with a positive charge?

 

A) Alpha

B) Beta

C) Gamma

D) Delta

Answer: A) Alpha

Question: What is the chemical symbol for iron?

 

A) Fe

B) Ir

C) In

D) Au

Answer: A) Fe

Question: What is the SI unit of electric current?

 

A) Ampere

B) Volt

C) Ohm

D) Coulomb

Answer: A) Ampere

Question: Which law states that the mass of reactants is equal to the mass of products in a chemical reaction?

 

A) Law of Conservation of Energy

B) Law of Definite Proportions

C) Law of Multiple Proportions

D) Law of Conservation of Mass

Answer: D) Law of Conservation of Mass

Question: What is the molecular formula for butane?

 

A) C3H8

B) C2H4

C) CH4

D) C6H12O6

Answer: A) C3H8

Question: In the periodic table, elements in the same column have similar:

 

A) Atomic masses

B) Atomic numbers

C) Electron configurations

D) Ionization energies

Answer: C) Electron configurations

Question: What is the chemical formula for sulfur hexafluoride?

 

A) SF2

B) SF4

C) SF6

D) S2F6

Answer: C) SF6

Question: Which gas is responsible for the distinctive smell of rotten fish?

 

A) Ammonia

B) Hydrogen sulfide

C) Methane

D) Nitrous oxide

Answer: B) Hydrogen sulfide