MCQ practice · SSC Chemistry Board questions · Chapter 6: Concept of Mole and Chemical Counting
What is the volume of 60 g of SO₂ at standard temperature and pressure?
Think it through first, then pick an option.
- a 21 liters
- b 22 liters
- c 23 liters
- d 25 liters
Answer and explanation
Correct answer: a 21 liters
SO₂ = 64; n = 60/64 = 0.9375; V = 0.9375 × 22.4 = 21 liters.
Why the other options are wrong
- b 22 liters: 22 liters is close to a full mole; 60 g of SO₂ is less than a mole, 21 liters.
- c 23 liters: 23 liters is more than a mole; 60 g of SO₂ = 21 liters.
- d 25 liters: 25 liters is more than a mole; with SO₂ = 64 the answer is 21 liters.
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