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Grahm's Law MCQ Basic Level

Dear Readers,

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Rate of diffusion of a gas is

  •  Directly proportional to its density
  •  Directly proportional to its molecular mass
  •  Directly proportional to the square root of its molecular mass
  •  Inversely proportional to the square root of its molecular mass

Inversely proportional to the square root of its molecular mass

Q2. The ratio of the rate of diffusion of a given element to that of helium is 1.4. The molecular weight of the element is

  •  2
  •  4
  •  8
  •  16

2

Q3. A gas diffuse 1/5 times as fast as hydrogen. Its molecular weight is

  •  50
  •  25
  •  80
  •  87

50

Q4. The molecular weight of a gas which diffuses through a porous plug at 1/6th of the speed of hydrogen under identical conditions is

  •  27
  •  72
  •  36
  •  48

72

Q5. Molecular weight of a gas that diffuses twice as rapidly as the gas with molecular weight 64 is

  •  16
  •  8
  •  64
  •  6.4

16

Q6. If rate of diffusion of A is 5 times that of B, what will be the density ratio of A and B

  •  1/25
  •  1/5
  •  25
  •  4

1/25

Q7. 50 ml of hydrogen diffuses out through a small hole from a vessel in 20 minutes. The time needed for 40 ml of oxygen to diffuse out is

  •  12 min
  •  64 min
  •  8 min
  •  32 min

64 min

Q8. The densities of two gases are in the ratio of 1 : 16. The ratio of their rates of diffusion is

  •  16 : 1
  •  4 : 1
  •  1 : 4
  •  1 : 16

4 : 1

Q9. Atmolysis is a process of

  •  Atomising gas molecules
  •  The breaking of atoms to sub-atomic particles
  •  Separation of gases from their gaseous mixture
  •  Changing of liquids to their vapour state

Separation of gases from their gaseous mixture



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