1000+ State of Matter MCQ for JEE Main [Solved]

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

2. 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

3. 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

4. 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

5. 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

6. 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

7. Indicate the most viscous liquid of the following
A. propanol-2
B. 1.2, ethandiol
C. 1.2,3 propentriol
D. ethanol
Answer : C

8. Which of the following is an amorphous solid?
A. NaCl
B. $Ca{F}_2$
C. Diamond
D. Glass
Answer : D

9. 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

10. 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

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

12. 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

13. 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

14. 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

15. 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

16. 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

17. The ionic radii of $R{b}^{+}$ and $B{r}^{-}$ ions are 1.47 $\stackrel{°}{A}$ and 1.95 $\stackrel{°}{A}$, respectively. The most probable type of geometry exhibited by RbBr on the radius ratio rule is
A. NaCl type
B. CsCl type
C. Zinc blende structure
D. Wurtzite structure
Answer : B

18. 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

19. 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

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

21. 22.4 litre of any gas at N.T.P. will contain
A. One gram equivalent
B. One gram atomic weight
C. One gram atom
D. One gram molecule
Answer : D

22. 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

23. 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

24. 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

25. The Van der Waal's equation explains the behaviour of
A. ideal gases
B. real gases
C. vapours
D. non-real gases
Answer : B

26. 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

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

28. Which of the following contains the same number of atoms as 12 gms: of Magnesium (Atomic weights : Mg = 24, C = 12, Ca = 40)
A. 10 gms of calcium
B. 20 gms of carbon
C. 20 gms of calcium
D. 12 gms of carbon
Answer : C

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

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

31. The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure:
A. critical temperature
B. Boyle's temperature
C. inversion temperature
D. reduced temperature
Answer : B

32. 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

33. 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

34. 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

35. 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

36. 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

37. The electrical conductivity of metals is of the order of
A. ${10}^{12}oh{m}^{-1}c{m}^{-1}$
B. ${10}^{8}oh{m}^{-1}c{m}^{-1}$
C. ${10}^{2}oh{m}^{-1}c{m}^{-1}$
D. ${10}^{-6}oh{m}^{-1}c{m}^{-1}$
Answer : B

38. The vol. of 20 gm. of hydrogen at N.T.P. is
A. 22.4 litres
B. 112 litres
C. 12 litres
D. 224 litres
Answer : A

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

40. 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

41. 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

42. 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

43. 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

44. The wt. of 2.8 litres of a gas at N.T.P. is 3.50 gms. Its V.D. is
A. 20
B. 28
C. 32
D. 14
Answer : A

45. What will be the mass of 6.023 x ${10}^{23}$ molecules of carbon monoxide?
A. 14 gm
B. 28 gm
C. 16 gm
D. 44 gm
Answer : D

46. 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

47. The average kinetic energy of the molecule of $S{O}_2$ (moL wt. = 64) at 27°C is E. Then the average kinetic energy of $C{O}_2$ at 27°C is
A. $\frac{E\times 64}{44}$
B. $\frac{E\times 44}{64}$
C. E
D. 22E
Answer : C

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

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

50. The vapour density of a gas is 11.2. The volume occupied by 2.4 g of the gas at S.T.P wil be
A. 2.4 litres
B. 3.6 litres
C. 2.24 litres
D. 11.2 liters
Answer : D