Mcqs on General chemistry

What is the atomic number of carbon?

A) 5
B) 6
C) 7
D) 8
Answer: B) 6

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

A) Oxygen
B) Silicon
C) Aluminum
D) Iron
Answer: A) Oxygen

What is the chemical symbol for gold?

A) Au
B) Ag
C) Fe
D) Cu
Answer: A) Au

Which gas makes up the majority of Earth’s atmosphere?

A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: C) Nitrogen

What is the pH of a neutral solution?

A) 0
B) 7
C) 14
D) 5
Answer: B) 7

Which subatomic particle carries a negative charge?

A) Proton
B) Neutron
C) Electron
D) Positron
Answer: C) Electron

What is the chemical formula for water?

A) CO2
B) H2O
C) CH4
D) O2
Answer: B) H2O

Which law states that the total pressure of a gas mixture is the sum of the partial pressures of its individual gases?

A) Boyle’s Law
B) Charles’s Law
C) Dalton’s Law
D) Avogadro’s Law
Answer: C) Dalton’s Law

What is the process of converting a solid directly into vapor without passing through the liquid phase called?

A) Sublimation
B) Evaporation
C) Condensation
D) Melting
Answer: A) Sublimation

Which element is a noble gas and commonly used in lighting?

A) Helium
B) Neon
C) Argon
D) Krypton
Answer: C) Argon