Entry test MCQs OF Chemistry Chapter 3

These MCQs are from Chemistry book 1 chapter 3 and are specially prepared for Entry test.

1-which of the following has the least critical temperature
a-NH3
b-H2O
c-O2
4-CO2

2-kinetic energy of 3 moles of a gas is
a-3RT
b-RT/2

c-2RT
d-3/2RT

3-the value of gas constant depends upon
a-temp
b-volume
c-no of moles
d-units of volume and pressure

4-at which temp, the hydrogen will have same kinetic energy as nitrogen molecules at 280K/
a-280K
B-400K
C-40K
D-50K

5-the root mean square velocity of an ideal gas at constant pressure varies with demsity as
a-d^2
b-d
c-(d)^1/2
d-1/(d)^1/2

6-which of the following deviates more from the ideal gas behaviour?
a-HCL
B-CH4
C-He
d-N2

7-oxygen gas contained in a flask at S.T.P was replaced by SO2under same conditions . the weight of S02 will be
a-equal to O2
b-half of O
c-twice that of O2
d-thrice that of O2

8-which of the following molecules have max root mean square velocity at 25 degree
a-CO2
B-H2S
C-NH3
D-SO2

9-equal volumes of H2 and He are present in the same vessel.the pressure exerted by H2 and He are in the same ratio
a-1:1
b-2;1
c-1:2
d-4;1

10-linds method is employed for
a-separation of gases
b-expansion of gases
c-compression of gases
d-liquefaction of gases

11-what will be the pressure of 1mole of an ideal gas maintained at 300k and 250cm^3 volume
a-98.5atm
b-96.7atm
c-95.8atm
d-97.1atm

12-hydrogen diffuses four times more rapidly than volume of an unknown gas,, molar mass of unknown gas will be
a-16g/mole
b-32g/mole
c-48g/mole
d-64g/mole

13-the kinetic theory of gases was put forward in 1738 by
a-Boltzmann
b-Maxwell
c-Clausius
d-Bernoulli

14-the partial pressure of O2in air is
a-760torr
b-323torr
c-159torr
d-116torr

15-what is the simplest form of matter
a-liquid
b-gas
c-solid
d-plasma

16- critical temp of gas depends upon
a-size of molecules
b-shape of molecules
c-intermolecular forces
d- all

17-the diffusion of gases at absolute zero will be
a-unchanged
b-slightly decreased
c-slightly increased

18-at constant temp the pressure of an ideal gas is doubled,,its density becomes
a-half
b-double
c-same
d-none

19-0.5 mole of NO2 and 0.5 mole of SO2 gas have equal
a-volume
b-molecules
c-mass
d-atoms

20-which one has the lowest density at room temperature
a-Ne
b-N2
c-NH3
d-CO

21-which of these gases diffuses more quickly than O2
a-H2S
B-NO
C Cl2
d-N20

22-under what conditions real gases deviate from ideal behaviour
a-high temperature
b-low temperature
c-high pressure
d-both b and c

23-which of the flowing gasses diffuse more readily
A-Cl2
B-CO2
C-CH4
D-N2

24-according to Graham's law..The rat of diffusion of H2 and 02 gases have the ratio
a-1:4
b-1:(4)^1/2
c-4:1
d-3:32

25-absolute zero is equal to
a --273.16k
b- -459F
c- 273.16C
d- 273.15 K

26- which one  of the following gases is more ideal at S.T.P
a- SO2
B- NH3
C-H2
D-H2S

27-which gas deviate more from ideal behaviour at high pressure
a-H2
B- He
c-Ar
d-H2S

28-eight grams of each of 02 nd H2 at 27C will have total kinetic energy in the ratio
a-1:1
b-16:1
c-8;1
d-1:16

29-which pair of gases do not obey Dalton law of partial pressure
a-H2 and O2
b- N2 and O2
c-NH3 and HCL
d-H2 and He

30-which gas cannot be dried by passing over H2SO4
a-SO2
B-H2
C-NO2
D-H2S

31-which one of the following molecules has the max root mean square velocity a 25C
a-C02
B-H2S
C-NH3
D-CO2

32-which of the following is the SI unit of pressure
a-ATM
b-Torr
c-pascal
d-pounds per square inch

33-10dm^3 of gas is maintained at 50C and 5atm. if pressure is doubled and absolute temp is halved,the new volume will be
a-10dm3
b-20dm3
c-2.5dm3
d-5dm3

34-ammonia gas diffuses twice as fast as does a gas. the most probable gas is
a-SO2
B-C4H10
C-C5H8
D-Cl2

35-the rat of diffusion of gas (molar mass=72) as compared to H2 will bee
a-1/6 times
b-2times
c-6times
d-same

36- at higher pressure isotherm moves away from the y axis due to
a-pressure
b-volume
c-no of moles
d-all of above