passwella.
Menu

JAMB Chemistry 1985 Question 6

Question 6

Gas Laws

Hydrogen diffuses through a porous plug

  1. A.at the same rate as oxygen
  2. B.at a slower rate than oxygen
  3. C.twice as fast as oxygen
  4. D.three times as fast as oxygen
  5. E.four times as fast as oxygen.
Show the answer and explanation

Answer: E (four times as fast as oxygen.)

Explanation

By Graham's law, rate is inversely proportional to the square root of the molar mass: rate(H2)/rate(O2) = √(32/2) = √16 = 4.