NEET - State of Matter 1000+ MCQ [Solved] PDF Download

1. Chloroform and benzene form a pair of miscible liquids. These can be separated by
A. a separating funnel
B. distillation
C. sublimation
D. filtration
Answer : B

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

3. 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

4. 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

5. The radii of $A^{+}$ and $X^{-}$ are 95 pm and 181 pm respectively. Coordination number of $A^{+}$ is expected to be
A. 8
B. 6
C. 4
D. 3
Answer : B

6. 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

7. 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

8. The vol. of 20 gms of nitrogen at N.T.P.
A. 16 litres
B. 36 litres
C. 8 litre
D. 32 litres
Answer : C

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

10. 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

11. 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

12. In a face centred cubic arrangement of ions, the coordination number of ions is
A. 6
B. 8
C. 12
D. 4
Answer : C

13. 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

14. Kinetic gas equation is, PV =...
A. nRT
B. $\frac{3}{3}$RT
C. $m{n}^1{c}^2$
D. $\frac{1}{3}mn{c}^2$
Answer : D

15. 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

16. 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

17. If the temperature and pressure remain unchanged the volume of $O_2$obtained by the decomposition of a certain volume of $S{O}_2$ will be
A. Triple the volume of $S{O}_2$
B. Half the volume of $S{O}_2$
C. Equal to the volume of $S{O}_2$
D. One third the volume of $S{O}_2$
Answer : C

18. 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

19. The ratio of RMS velocity to average velocity of a gas molecule at a particular temperature is
A. 1.086:1
B. 1:1.086
C. 2 :1.086
D. 1.086 : 2
Answer : A

20. The number of atoms in 0.004 gm of magnesium is close to
A. 36x ${ }^{{10}^5}$
B. ${ }^{{10}^{20}}$
C. 5 x ${ }^{{10}^{20}}$
D. 6.02 x ${}^{{10}^{23}}$
Answer : B

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

22. 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

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

24. To which of the following mixtures is the Dalton's law of partial pressures not applicable?
A. $H_2+O_2$
B. $N_2+O_2$
C. NO + $O_2$
D. Xe + Ar
Answer : C

25. 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

26. 22.4 litres of $S{O}_2$ at 27.3°C and 1 atmosphere pressure shall weigh
A. 32 g
B. 16 g
C. 44.8 g
D. 48.5 g
Answer : D

27. The molecular velocity of any gas is
A. proportional to absolute temperature
B. proportional to the square root of absolute temperature
C. independent of temperature
D. proportional to die square of absolute temperature
Answer : B

28. Sodium chloride has fee structure. How many $N{a}^{+}$ and $C{l}^{-}$ ions are there in the unit cell?.
A. 6 and 6
B. 4 and 4
C. 1 and 1
D. 6 and 4
Answer : B

29. A gas or vapour may be liquefied only at a temperature at or
A. below the critical temperature
B. above the critical temperature
C. above the normal boiling point
D. at any temperature
Answer : A

30. The number of atoms per unit cell in bcc arrangement is
A. 1
B. 4
C. 3
D. 2
Answer : D

31. 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

32. 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

33. 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

34. Which of the following should be most viscous?
A. $C{H}_{3}OH$
B. $C{H}_{3}C{H}_{2}OH$
C. $C{H}_{3}OC{H}_3$
D. $HOC{H}_{2}C{H}_{2}OH$
Answer : D

35. 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

36. The number of molecules of $C{O}_2$ present in 44 gms. of $C{O}_2$ is
A. 6 x ${}^{{10}^{23}}$ approx
B. ${10}^{30}$ approx
C. 3 x ${}^{{10}^{10}}$ approx
D. 12 x ${ }^{{10}^{23}}$ approx
Answer : B

37. At 303 K ethanol has a vapour pressure of about 0.118 atm., acetic acid has the vapour pressure of about 0.039 atm., and ethyl iodide has a vapour pressure of about 0.263 atm. Which of the following represents the correct order of increasing normal boiling point ?
A. $C{H}_{3}COOH<C_2{H}_{5}OH<C_2{H}_{5}I$
B. $C_2{H}_{5}I<C{H}_{3}COOH<C_2{H}_{5}OH$
C. $C_2{H}_{5}I<C_2{H}_{5}OH<C{H}_{3}COOH$
D. $C_2{H}_{5}OH<C_2{H}_{5}I<C{H}_{3}COOH$
Answer : C

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. 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

40. 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

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

42. 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

43. 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

44. 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

45. 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

46. An open vessel at 37°C is heated until 3/5 of the air in it has been expelled. Assuming that the volume of the vessel remains constant the temperature to which the vessel is heated is
A. 502°C
B. 502 K
C. 243.67°C
D. 925C
Answer : A

47. 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

48. In a dose packed arrangement of N spheres, the number of tetrahedral holes are
A. N
B. 2N
C. N/2
D. $N_2$
Answer : B

49. In the ideal gas equation PV = nRT constant 'R' has the unit
A. joule
B. litre/mol
C. lit-atm/deg/mol
D. calorie/mole
Answer : C

50. The V.D. of a gas is 11.2 gm. The volume occupied by 11.2 gm. of this gas at N.T.P. is
A. 12 litre
B. 11.2 litres
C. 2.24 litres
D. 22.4 litres
Answer : A