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JAMB Chemistry 1998 Question 7

Question 7

Gas Laws

If sulphur (IV) oxide and methane are released simultaneously at the opposite ends of a narrow tube, the rates of diffusion RSO2 and RCH4 will be in the ratio [S = 32, O = 16, C = 12, H = 1]

  1. A.4:1
  2. B.2:1
  3. C.1:2
  4. D.1:4
Show the answer and explanation

Answer: C (1:2)

Explanation

Rate is inversely proportional to √(molar mass). R(SO2)/R(CH4) = √(16/64) = 1/2, so the ratio is 1 : 2.