1000+ State of Matter Multiple Choice Question Answer [Solved]

1. Which of the following would you expect to affect the vapour pressure of a liquid?
A. Inter-molecular forces in the liquid
B. Volume of the liquid in the liquid-vapour equilibrium
C. Volume of the vapour in the liquid-vapour equilibrium
D. The size of the container in which liquid-vapour equilibrium is establishe
Answer : A

2. Lattice energy of a solid is high if
A. the radii of the ions are large
B. radii of the ions are small
C. charge on the ions are small
D. the ions are neutral
Answer : B

3. Avogadro stated that under similar conditions of temperature and pressure equal volumes of all gases contain equal number of
A. atoms
B. molecules
C. electrons
D. ions
Answer : B

4. When there is more deviation in the behaviour of a gas from ideal gas equation PV = nRT
A. at high temperature and low pressure
B. at low temperature and high pressure
C. at high temperature and high pressure
D. at low temperature and low pressure
Answer : B

5. The molecular weight of a volatile liquid can be determined by
A. Dumas' method
B. Victor Meyer's method
C. Cryoscopic method
D. Osmotic pressure
Answer : B

6. Gases deviate from the ideal behaviour because their molecules
A. possess negligible volume
B. have forces of attraction between them
C. are polyatomic
D. are not attracted to one another
Answer : B

7. Match box has the symmetry of which of the following systems?
A. Cubic
B. Orthorhombic
C. Tetragonal
D. Monoclinic
Answer : A

8. 7.Which of the following sets of conditions represent the easiest way to liquefy a gas?
A. Low temperature and high pressure
B. High temperature and low pressure
C. High temperature and low pressure
D. None of these
Answer : A

9. Cubic close packed arrangement of ions is described as
A. ABC AB ABC.....
B. ABC ABC......
C. AB AB..........
D. ABC CBA...
Answer : B

10. Kinetic theory of gases postulates :
A. The molecules in a gas are in stationary state
B. The molecules in a gas exert appreciable attraction on each other
C. The molecules move in a random motion with widely different velocities
D. The molecules in a gas collide against each other as well as the wall of the container, but do not change their direction of motion
Answer : C

11. The vapour density of gas A is four times that of gas B. If the molecular weight of gas B is M, then the molecular weight of gas A is
A. 2M
B. 4M
C. 8M
D. M/4
Answer : B

12. An element has atomic weight 24 and equivalent weight 11.9. Its valency is
A. 1
B. 2
C. 3
D. 4
Answer : B

13. The pressure of the ideal gas is less than the real gas because of the
A. increase in the number of collisions
B. volume occupied by the molecules
C. inter-molecular attraction
D. finite size of molecules
Answer : C

14. A balloon filled with ethane is pricked up with sharp point and quickly plunged into a tank of hydrogen at the same pressure. After some time balloon will
A. be enlarged
B. be collapse
C. remain unchanged in size
D. have half its volume of the gas
Answer : A

15. The ionic radii of $M{g}^{+2 }$ and $O^{-2}$ are 0.66 $\stackrel{°}{A}$ and 1.40 $\stackrel{°}{A}$ , respectively. The most probable type of gteometry exhibited by MgO on the basis of radius ratio rule is
A. NaCl type
B. CsCl type
C. ZnS type
D. Boron oxide type
Answer : A

16. What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?
A. 760 torr
B. 380 torr
C. 197 torr
D. None of these
Answer : A

17. The relation between molecular wt. and vapour density is
A. Molecular wt. = $\frac{2}{3}$ V.D.
B. Molecular wt. = $\frac{1}{3}$ V.D.
C. Molecular wt. = V.D.
D. Molecualr wt = 2 x V.D.
Answer : A

18. Volume occupied by 1 gm equivalent of oxygen at NTP is
A. 22.4 litres
B. 2.24 litres
C. 5.6 litres
D. 11.2 litres
Answer : C

19. In the gas equation PV = xT, x is a constant. The value of the constant depends upon
A. the quantity of gas
B. the quality of gas
C. type values of T and P
D. None of these
Answer : A

20. When an ideal gas undergoes unrestricted expansion, no cooling occurs because the molecules
A. are above inversion temperature
B. exert no attractive force on each other
C. do work equal to loss in kinetic energy
D. collide without loss of energy
Answer : B

21. 6.If the reactants and products both are in gaseous phase they bear a simple ratio in their
A. volumes
B. molecules
C. atoms
D. temperature
Answer : A

22. The critical temperature of a substance is defined as
A. the temperature above which the substance decomposes
B. the temperature above which the substance can exist only as a gas
C. melting point of the substance
D. boiling point of the substanc
Answer : B

23. 1.The correct relationship representing the volume occupied by 44 gm of $C{O}_2$ and 64 gm of $S{O}_2$ at constant temperahire and pressure:
A. V($C{O}_{2 }$) > V($S{O}_2$)
B. V($C{O}_{2 }$) = V($S{O}_2$)
C. V($S{O}_2$) > V($C{O}_{2 }$)
D. cannot be predicted
Answer : B

24. Which compound possesses greatest lattice energy?
A. LiF
B. NaF
C. KF
D. CsF
Answer : A

25. Four 1 litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same temperature and pressure, the ratio of total number of atoms of these gases present in the different flasks would be
A. 3:2:2:1
B. 2:1:2:3
C. 1:2:2:3
D. 1:1:1:1
Answer : C

26. For a given gas at temperature T and pressure P the root mean square velocity (RMS) is C; then at temperature T and pressure 3P the RMS is
A. Unchanged
B. 3C
C. C/3
D. $C^3$
Answer : A

27. A liquid of density 1.742 g $c{m}^{-3}$ is observed to show a capillary rise of 73 mm in a tube of radius 0.65 mm. Then the surface tension of the liquid is
A. 4.1 x ${}^{{10}^{-2}}$ dynes $c{m}^{-1}$
B. 4.1 x ${10}^3$ dynes $c{m}^{-1}$
C. 7.1 x ${10}^{-3}$ dynes $c{m}^{-1}$
D. None of these
Answer : B

28. Vapour density of a gas is 35.5. The volume occupied by 3.55 gm of the gas at NTPis
A. 1.12 litres
B. 2.24 litres
C. 22.4 litres
D. 11.2 litres
Answer : A

29. The best electrical conductor of the following is
A. $C{O}_2$(s)
B. Si(s)
C. NaCl (fused)
D. $B{r}_2$(I)
Answer : C

30. How many nearest neighbours are there in an atom or ion in an octahedral hole of a close packed structure?
A. 4
B. 6
C. 8
D. 18
Answer : B

31. Boltzmann constant is given by
A. R
B. R+N
C. R:N
D. R-N
Answer : C

32. Which of the following statement wrong?
A. In solid state molecules, atoms or ions are held with a strong force of attraction and are in a fixed position
B. In liquid state the molecules, atom or ions are held with a strong force and have a restricted motion
C. In gaseous states, the molecules are randomly arranged and are apart from each other
D. Solid, liquid and gaseous states have different movement is particles
Answer : B

33. If the tetrahedral sites in ccp arrangement of negative ions (Y) were half filled with cation (X), the empirical formula of the compound would be
A. $X_{2}Y$
B. XY
C. $X{Y}_2$
D. $X_2{Y}_3$
Answer : B

34. The vapour density of ozone would be
A. 72
B. 8
C. 48
D. 24
Answer : C

35. Which of the following is an example of covalent network solid?
A. Sodium
B. Solid carbon dioxide
C. Sodium chloride
D. Silicon
Answer : D

36. Indicate the most volatile liquid of the following:
A. $C{H}_{3}OH$
B. $C{H}_{3}OC{H}_3$
C. $H_{2}O$
D. $C{H}_{3}C{H}_{2}OC{H}_{2}C{H}_3$
Answer : D

37. In a solid atoms A are arranged in ccp array. Atoms B occupy all the octahedral voids and half the tetrahedral voids. The formula of the compound is expected to be
A. $A{B}_2$
B. $A{B}_3$
C. $A_2{B}_3$
D. $A_{2}B$
Answer : A

38. One gram molecule of a gas at N.T.P occupies 22.4 litres. This fact was derived from
A. Benjamin hypothesis
B. Avogadro's hypothesis
C. Dalton's theory
D. Law of atomic volume
Answer : C

39. Molecular formula of D in the above case is
A. $A{B}_5$
B. $A_5{B}_2$
C. $A_2{B}_5$
D. AB
Answer : D

40. The number of molecules in 4.25 gm of ammonia are approximately
A. $0.5\times {10}^{23}$
B. $1.5\times {10}^{23}$
C. $2.5\times {10}^{23}$
D. $3.5\times {10}^{23}$
Answer : B

41. Certain volume of a gas exerts on its walls some pressure at a particular temperature. It has been found that by reducing the volume of the gas to half its original value, the pressure becomes I twice that the initial value of constant temperature. This happens because
A. More number of a gas molecules strike the surface per second
B. Velocity of the gas molecules increases
C. Gas molecules attract each other
D. Weight of the gas increase with volume
Answer : C

42. Volume occupied by 4.4 gift of carbon dioxide is
A. 4.4 litres
B. 2.24 litres
C. 22.4 litres
D. 4.48 litres
Answer : B

43. Correct gas equation is
A. $\frac{P_1{V}_1}{P_2{V}_2}=\frac{T_1}{T_2}$
B. $\frac{V_1{T}_2}{P_1}=\frac{P_2{T}_1}{T_2}$
C. $\frac{P_1{T}_1}{V_1}=\frac{P_2{T}_2}{V_2}$
D. $\frac{V_1{V}_2}{T_1{T}_2}=P_1{P}_2$
Answer : A

44. The mean free path of a gas molecule is the distance
A. between the two opposite walls of the container
B. through which the molecules travel in one second
C. through which molecules move between two consecutive collisions
D. travelled by all the molecules divided by the total number of molecules in a particular gas
Answer : C

45. In a close packed arrangement of N spheres, the number of octahedral holes are
A. N
B. 2N
C. 4N
D. 8N
Answer : A

46. In zinc blende structure, the zinc atoms occupy
A. all tetrahedral sites
B. all octahedral sites
C. half of the octahedral sites
D. half of the tetrahedral sites
Answer : D

47. A closed vessel contains equal number of molecules of a total pressure at 740 mm. If oxygen is removed from the system the pressure will
A. become half of 740 mm
B. remain unchanged
C. become 1/9 of 740 mm
D. become double of 740 mm
Answer : A

48. What types of forces are present in molecular solids?
A. electrovalent bonds
B. hydrogen bonds
C. metallic bonds
D. Van der Waal's forces
Answer : D

49. If all the octahedral sites in a cubic close packed arrangement ($B^{-}$) are completelyfilled with $A^{+}$ cations, the empirical formula of the compound could then be
A. $A{B}_2$
B. $A_{2}B$
C. AB
D. None of these
Answer : C

50. The coordination number of each sphere in hcp arrangement is
A. 12
B. 8
C. 6
D. 4
Answer : A