Chemistry Post UTME past questions and answers
Here are 20 sample questions:
Which of the following is a noble gas?
a) Hydrogen
b) Oxygen
c) Neon
d) Nitrogen
Answer: c) Neon
What is the chemical symbol for silver?
a) Si
b) Ag
c) Al
d) Sr
Answer: b) Ag
What is the chemical formula for sulfuric acid?
a) HCl
b) H2SO4
c) HNO3
d) CH4
Answer: b) H2SO4
Which gas is responsible for the "greenhouse effect"?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: c) Carbon dioxide
What is the chemical formula for water?
a) CO2
b) H2O
c) NaCl
d) O2
Answer: b) H2O
Which of the following is a halogen?
a) Sodium
b) Chlorine
c) Calcium
d) Potassium
Answer: b) Chlorine
What is the pH of a neutral solution?
a) 0
b) 7
c) 14
d) 1
Answer: b) 7
How many electrons are in the outermost energy level of a nitrogen atom?
a) 2
b) 6
c) 8
d) 5
Answer: d) 5
What is the chemical symbol for iron?
a) Fe
b) Ir
c) Fr
d) In
Answer: a) Fe
Which gas is produced during photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Hydrogen
d) Nitrogen
Answer: a) Oxygen
What is the chemical formula for methane?
a) CH4
b) H2O
c) CO2
d) NH3
Answer: a) CH4
Which element is the most abundant in Earth's crust?
a) Oxygen
b) Silicon
c) Carbon
d) Aluminum
Answer: a) Oxygen
What is the chemical formula for table salt?
a) H2O
b) NaCl
c) CO2
d) CH4
Answer: b) NaCl
Which of the following is a noble gas?
a) Helium
b) Sodium
c) Chlorine
d) Phosphorus
Answer: a) Helium
What is the chemical formula for glucose?
a) C6H12O6
b) NaCl
c) H2O
d) CO2
Answer: a) C6H12O6
How many protons are there in the nucleus of a carbon-12 atom?
a) 6
b) 12
c) 7
d) 14
Answer: a) 6
Which gas is commonly used for filling balloons?
a) Oxygen
b) Carbon dioxide
c) Helium
d) Hydrogen
Answer: c) Helium
What is the chemical formula for hydrogen peroxide?
a) H2O2
b) NaCl
c) CO2
d) HCl
Answer: a) H2O2
What is the chemical formula for ammonia?
a) NH4
b) H2O
c) NH3
d) CH4
Answer: c) NH3
What is the molar mass of water (H2O)?
a) 18 g/mol
b) 16 g/mol
c) 20 g/mol
d) 22 g/mol
Answer: a) 18 g/mol
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