Grahm's Law MCQ Basic Level

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