PPSC Chemistry Question 2022

TEST 5
STATES OF MATTER
SHAKEEL ALAM
PPSC CHEMISTRY
ASPIRANTS

1. which of the following gas show more deviation
from ideal behavior
a) CO 2
b) SO2
c) N2
d) None

2. What is relative rate of effusion of CO and CO2
a) CO is 1.25 time faster than CO2
b) CO2 is 1.25 time faster than CO
c) CO is 3.75 time faster than CO2
d) none of these

3. Which one has lowest density at room temperature
a) Ne
b) N2
c) NH3
d) None

4. Unit of constant ‘a’ are
a) Nm-4 mol-2
b) Nm+6 mol-2
c) Nm+4 mol-2
d) None

5. Hydrogen effuses four time more rapidly than
unknown gas
a) 16
b) 48
c) 32
d) None

6. Very small values of van Der Waal constants
show that
a) The molecules of the gas are big sized
b) Gas is sufficiently polar
c) The gases are non-ideal
d) None

7. Which of the following has least Tc
a) NH3
b) H2O
c) O2
d) CO2

8. Kinetic energy of 3 moles of a gas is
a) 3RT
b) RT/2
c) 2RT
d) None

9. At what temperature, the H2 molecule will have
same KE as N2 molecule at 280K
a) 280K
b) 400K
c) 40K
d) None

10. Quantitative relation of Charles law is hold only
for
a) Kelvin scale
b) Celsius scale
c) Farhenheit Scale
d) None

11. Equal masses of methane and oxygen are mixed
in an empty container at 25C. The fraction of toal
pressure exerted by oxygen is
a) 1/3
b) 8/9
c) 1/9
d) 16/17

12. Which solid does not contain covalent bond
a) Graphite
b) Copper
c) Diamond
d) None

13. The number Cl- ions per unit cell in NaCl
a) 2
b) 4
c) 6
d) None

14. Which one of the following is pseudo soild
a) CaF2
b) Glue
c) Diamond
d) None

15. Which one is not the boiling point of water
(a) 10 0C
(b) 150 0C
(c) 400 0C
(d) None

16. The shape of diamond crystal is
a) Cubic
b) Hexagonal
c) Tetragonal
d) None

17. Sugar belongs to crystal system
a) Cubic
b) Triclinic
c) Monoclinic
d) None

18. Boiling point of water at Mount Everest is
a) 100
b) 98
c) 69
d) None

19. Which of the following volume-temperature plot
represents the behavior of 1 mole of ideal gas at 1atm
pressure

20. Maximum vapour pressure is shown by
a) HF
b) HCl
c) HBr
d) HI

21. The strongest H- Bond is present in the
following
a) HF
b) H2O
c) NH3
d) None

22. The element responsible for H bonding in
chloroform and acetone is
a) C
b) O
c) H
d) None

23.Volume of an ideal gas increases or decreases by 4dm3 for
every 1oC increase or decrease in temperature at constant
pressure, What is the volume of gas at 00C
a) 546cm3
b) 746cm3
c) 1092cm3
d) None

24. If the pressure of gas increased to 4 times and
temperature is increased twice then volume of gas
will be _________ the original value.
a) 4 time
b) 2 time
c) Half
d) None

25. The temperature at which the volume of a gas
will become twice what it is at 00C at constant
pressure
a) 546C
b) 546K
c) 273K
d) None

26. Ice is 9% lighter than liquid water at
a) 0C
b) 4C
c) 10C
d) None

27. Correct order of vapor pressure is
a) H2O > HF >HCl> NH3
b) HF > H2O >HCl> NH3
c) H2O > HF > NH3>HCl
d) None

28. Stronger Intermolecular force is
a) H-Bonding
b) Dipole-dipole
c) Ion-Dipole
d) None

29. The geometry of the the Cl- ions at face centers
of the NaCl crystal is
a) Cubic
b) Octahedral
c) Hexagonal
d) None

30. The electron present fot conduction parallel to
layers in graphite is
a) 1 of 1
b) 2 of 4
c) 1 of 4
d) None