Question: What is the chemical formula for sulfur hexafluoride?
A) SF4
B) SF6
C) S2F6
D) S3F8
Answer: B) SF6
Question: Which gas is responsible for the formation of acid rain?
A) Sulfur dioxide (SO2)
B) Nitrogen dioxide (NO2)
C) Carbon monoxide (CO)
D) Methane (CH4)
Answer: A) Sulfur dioxide (SO2)
Question: What is the chemical symbol for iodine?
A) I
B) Io
C) In
D) Ir
Answer: A) I
Question: What is the process of a substance changing directly from a gas to a solid without passing through the liquid state called?
A) Condensation
B) Sublimation
C) Evaporation
D) Deposition
Answer: B) Sublimation
Question: Which of the following is a property of acids?
A) Turn red litmus paper blue
B) Taste bitter
C) Release hydroxide ions (OH-) in water
D) Have a pH greater than 7
Answer: A) Turn red litmus paper blue
Question: What is the chemical formula for glucose?
A) C6H12O6
B) CH3COOH
C) H2O
D) NaCl
Answer: A) C6H12O6
Question: Which gas is produced during the process of photosynthesis?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: A) Oxygen
Question: What is the chemical symbol for tin?
A) Ti
B) Tn
C) Sn
D) Si
Answer: C) Sn
Question: What is the chemical formula for hydrofluoric acid?
A) HF
B) HCl
C) H2SO4
D) HNO3
Answer: A) HF
Question: In the periodic table, what group do the noble gases belong to?
A) Group 1
B) Group 2
C) Group 17
D) Group 18
Answer: D) Group 18
Question: Which of the following is a property of metals?
A) Poor conductors of electricity
B) Brittle
C) Malleable and ductile
D) Low melting points
Answer: C) Malleable and ductile
Question: What is the chemical symbol for calcium?
A) Ca
B) Co
C) Cu
D) Cm
Answer: A) Ca
Question: What is the pH of a neutral solution?
A) 0
B) 7
C) 14
D) 10
Answer: B) 7
Question: Which gas is commonly used in welding to provide a shield for the molten metal?
A) Oxygen
B) Acetylene
C) Argon
D) Nitrogen
Answer: C) Argon
Question: What is the chemical formula for sodium hydroxide?
A) NaOH
B) HCl
C) Na2CO3
D) KOH
Answer: A) NaOH
Question: What is the chemical symbol for potassium hydroxide?
A) KOH
B) KCl
C) KH
D) K2O
Answer: A) KOH
Question: Which gas is responsible for the sweet smell of rotten apples?
A) Methane (CH4)
B) Ethylene (C2H4)
C) Acetylene (C2H2)
D) Hydrogen sulfide (H2S)
Answer: B) Ethylene (C2H4)
Question: What is the chemical formula for nitrous oxide?
A) NO2
B) N2O3
C) N2O
D) NO
Answer: C) N2O
Question: Which of the following is a nonmetal?
A) Sodium
B) Oxygen
C) Copper
D) Calcium
Answer: B) Oxygen
Question: What is the chemical symbol for silver chloride?
A) AgCl
B) AuCl
C) AlCl3
D) AgBr
Answer: A) AgCl.
FAQs
What topics are commonly covered in SS3 Third Term Chemistry past questions and answers?
SS3 Third Term Chemistry past questions typically cover revision topics from the entire senior secondary curriculum. These often include organic chemistry, such as hydrocarbons and functional groups, acids, bases and salts, electrolysis, redox reactions, chemical equilibrium, rates of reaction, and quantitative analysis. Questions may also test students on periodic trends, calculations involving mole concepts, and practical chemistry procedures. The third term usually emphasizes exam preparation, so the questions are structured to reflect WAEC and NECO examination standards.
Why is it important to practice SS3 Third Term Chemistry past questions?
Practicing past questions helps students become familiar with the exam format, question patterns, and marking schemes. It allows them to identify frequently tested topics and understand how answers should be structured to earn full marks. Regular practice also improves time management skills and boosts confidence before external examinations like WAEC and NECO. Additionally, reviewing answers helps students learn from mistakes and strengthen weak areas.
How can students effectively study with SS3 Third Term Chemistry past questions and answers?
Students should first attempt the questions on their own under timed conditions to simulate an exam environment. Afterward, they should carefully compare their responses with the provided answers and marking schemes to understand where they lost marks. It is helpful to group questions by topic, such as organic chemistry or electrochemistry, to focus on specific weak areas. Consistent revision, combined with textbook reading and teacher guidance, ensures better understanding and retention.
Where can students get reliable SS3 Third Term Chemistry past questions and answers?
Students can obtain reliable past questions from their school teachers, educational resource centers, and recommended revision textbooks. Many schools compile past examination papers for internal revision purposes. In addition, trusted educational websites and exam preparation platforms provide downloadable versions of past WAEC and NECO Chemistry questions with detailed solutions. It is important to ensure that the materials are up-to-date and aligned with the current syllabus.
