SS1 Third Term Chemistry Past Questions And Answers
20 SS1 third term Chemistry questions with options and answers:
Question: What is the chemical formula for sulfuric acid?
A) HCl
B) H2SO4
C) NaOH
D) HNO3
Answer: B) H2SO4
Question: Which gas is released during the process of respiration in humans?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer: A) Carbon dioxide
Question: What is the common name for ethanoic acid?
A) Vinegar
B) Lemon juice
C) Milk
D) Bleach
Answer: A) Vinegar
Question: Which element is present in all organic compounds?
A) Carbon
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer: A) Carbon
Question: What is the chemical symbol for potassium hydroxide?
A) KOH
B) KCl
C) NaOH
D) HCl
Answer: A) KOH
Question: What is the process of converting a liquid to a gas called?
A) Sublimation
B) Condensation
C) Vaporization
D) Evaporation
Answer: D) Evaporation
Question: Which gas is responsible for the “pop” sound in a squeaky toy?
A) Oxygen
B) Helium
C) Hydrogen
D) Nitrogen
Answer: B) Helium
Question: What is the chemical formula for table sugar (sucrose)?
A) C6H12O6
B) CH4
C) CO2
D) C12H22O11
Answer: D) C12H22O11
Question: What is the chemical symbol for neon?
A) Ne
B) Na
C) Ni
D) Nb
Answer: A) Ne
Question: Which gas is commonly used in balloons for buoyancy?
A) Oxygen
B) Nitrogen
C) Helium
D) Hydrogen
Answer: C) Helium
Question: What is the chemical formula for carbon dioxide?
A) CO
B) CO2
C) C2O
D) CH4
Answer: B) CO2
Question: Which of the following is a transition metal?
A) Sodium
B) Iron
C) Chlorine
D) Potassium
Answer: B) Iron
Question: What is the chemical symbol for iodine?
A) Io
B) In
C) Ir
D) I
Answer: D) I
Question: In a chemical reaction, what are the substances that undergo change called?
A) Elements
B) Compounds
C) Reactants
D) Products
Answer: C) Reactants
Question: What is the chemical formula for hydrofluoric acid?
A) HF
B) HCl
C) H2SO4
D) HNO3
Answer: A) HF
Question: Which gas is responsible for the color and smell of rotten fruits?
A) Oxygen
B) Ethene
C) Methane
D) Hydrogen
Answer: B) Ethene
Question: What is the chemical symbol for manganese?
A) Mg
B) Mn
C) Mo
D) Na
Answer: B) Mn
Question: What is the SI unit of pressure?
A) Pascal (Pa)
B) Newton (N)
C) Joule (J)
D) Watt (W)
Answer: A) Pascal (Pa)
Question: Which element is a halogen and is commonly used in disinfectants?
A) Fluorine
B) Chlorine
C) Bromine
D) Iodine
Answer: B) Chlorine
Question: What is the chemical formula for nitric acid?
A) H2SO4
B) HCl
C) NaOH
D) HNO3
Answer: D) HNO3
