State of Matter 1000+ MCQ with answer for IBPS PO

1. 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

2. In a unit cell of cesium chloride the arrangement of cesium ions is
A. face centred cubic
B. hexagonal close packed
C. body centred cubic
D. simple cubic
Answer : C

3. A vessel containing 10 litre of air at atmospheric pressure is connected to an evacuated 9 litre vessel The resulting pressure will be
A. 2 atm
B. 31 atm
C. 0.526 atm
D. 52.6 atm
Answer : C

4. 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

5. According to Avogadro's hypothesis equal volumes of two gases under the same conditions of temperature and pressure contain
A. Equal number of electrons
B. Equal number of ions
C. Equal number of atoms
D. Equal number of molecules
Answer : D

6. The weight of 22.4 litres of any gas at N.T.P. represent its
A. gm atomic weight
B. gm molecular weight
C. gm equivalent weight
D. None of these
Answer : B

7. What will be the mass of 6.03 x ${}^{{10}^{23}}$ molecules of carbon monoxide ?
A. 18.00
B. 28.01
C. 56.02
D. 14.05
Answer : B

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

9. Normal boiling points values are for $N{H}_3$, - 34C, bromine 58°C, carbon tetrachloride 77°C and oxygen - 183°C. Which of these liquids has the highest vapour pressure at room temperature?
A. $N{H}_3$,
B. $B{r}_2$
C. $CC{l}_4$
D. $O_2$
Answer : D

10. In NaCl type structure, the coordination number of the cation and anion are
A. 6 and 4
B. 6 and 6
C. 4 and 4
D. 8 and 4
Answer : B

11. A chalk box exhibits
A. cubic geometry
B. monoclinic geometry
C. orthorhombic geometry
D. tetragonal
Answer : A

12. 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

13. Density of a gas relative to air is 2.3. If the average molar mass of air is 29.08/mol, the molecular mass of the gas will be
A. 29 gm/mole
B. 66.7 gm/mole
C. 12.67 gm/mole
D. 25.22 gm/mole
Answer : B

14. An example of covalent solid is
A. diamond
B. NaCl
C. Copper
D. $C{O}_2$
Answer : A

15. 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

16. 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

17. 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

18. 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

19. 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

20. One mole of gas is defined as
A. The number of molecules in 22.4 litres of gas at S.T.P
B. The number of molecules contained | in 6 grams of 12 C isotope
C. The number of molecules in one formula weight of gas
D. The number of molecules in litre of gas
Answer : C

21. The space occupied by spheres in ccp arrangement is
A. 74.06%
B. 68.05%
C. 60.4%
D. 52.4%
Answer : A

22. Which of the following phrases would be incorrect to use?
A. An atom of an element
B. An atom of a compound
C. A molecule of a compound
D. A molecule of an element
Answer : C

23. 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

24. 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

25. The limiting radii ratio for the tetrahedral geometry is
A. 0.155
B. 0.444
C. 0.732
D. 0.225
Answer : D

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

27. Which of the following methods is used to determine the atomic weight?
A. Victor Meyer's method
B. Dumas' method
C. Cannizaro's method
D. None of these
Answer : C

28. How many nearest neighbours are there in an octahedral hole of a close packed structure
A. 4
B. 6
C. 8
D. 12
Answer : B

29. The vapour density of a gas in 35.5. The volume occupies by 3.55 gms of the gas at N.T.P. is
A. 224 litres
B. 2.24 litres
C. 11.12 litres
D. 1.12 litres
Answer : A

30. Number of molecules of carbon dioxide present in 44 gm $C{O}_2$ is
A. 12 x ${}^{{10}^{23}}$ approximately
B. 3 x ${ }^{{10}^{10}}$ approximately
C. 6 x ${ }^{{10}^{10}}$ approximately
D. 3 x ${}^{{10}^{23}}$ approximately
Answer : C

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

32. 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

33. 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

34. Which one of the following contains same number of molecules as 4.4 gm of carbon dioxide (mol. wt. of $C{O}_2$ = 44, Mol, wt. of $S{O}_2$ = 64)?
A. 64 gm of sulphur dioxide
B. 4.4 gm of sulphur dioxide
C. 6.4 gm of sulphur dioxide
D. 3.2 gm of sulphur dioxide
Answer : C

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

36. Which of the following will have low heat of fusion?
A. a molecular solid
B. an ionic solid
C. a metallic solid
D. a network of covalent solid
Answer : A

37. The number of molecules is 4.25 g of ammonia are approximately
A. 3.5 x ${}^{{10}^{23}}$
B. 2.5 x ${}^{{10}^{23}}$
C. 1.5 x ${}^{{10}^{23}}$
D. 0.5 x ${}^{{10}^{23}}$
Answer : D

38. In fluorite structure coordination number of calcium ions is
A. 4
B. 6
C. 8
D. 3
Answer : C

39. 20 litres of hydrogen gas weighs about
A. 1.8 g
B. 3.6 g
C. 224 g
D. 12.2 g
Answer : A

40. In which one of the following does diffusion occur most rapidly?
A. Solid
B. Liquid
C. Gases
D. Gels
Answer : C

41. In anti-fluorite structure the negative ions
A. occupy tetrahedral voids
B. occupy octahedral voids
C. are arranged in ccp
D. are arranged in hcp
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. 5.At a given temperature and pressure 2 volumes of A combine with 5 volumes of B to form 2 volmes of C and 1 volume. A combine with one volume of B to form 2 volumes of D. The formula of C is
A. $A_3{B}_6$
B. $\sqrt{AB}$
C. $A_2{B}_5$
D. $A{B}_5$
Answer : B

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

45. 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

46. The number of molecules in 32 gms of oxygen in
A. 6.02 x ${}^{{10}^{10}}$
B. 3.2 x ${}^{{10}^{23}}$
C. 6.02 x ${}^{{10}^{22}}$
D. 32 x ${}^{{10}^{10}}$
Answer : A

47. 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

48. In the wurtzite structure sulphur atoms have
A. cubic arrangement
B. hexagonal dose packed arrangement
C. body centred arrangement
D. None of these
Answer : B

49. In the process of sublimation, the substance transforms directly
A. from the solid state to the liquid state
B. from the liquid state to gaseous state
C. from the solid state to gaseous state
D. from the liquid state to solid state
Answer : C

50. Three dimensional array of points in space is called
A. unit cell
B. crystal lattice
C. micro-crystal
D. None of these
Answer : A