FSc Part 1 Chemistry chapter 4: Liquids and solids MCQs with answers

By Team Megalecture · Updated 4 Nov 2026

32 exam-style questions on Liquids and solids, each with the answer and a short explanation. Ten of them are below to try. The chapter test draws ten fresh questions each time and is marked the moment you finish, with your score by topic.

32 questions · 3 topics · 10 per test

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What chapter 4 covers

Ten Liquids and solids questions with answers

Try each one, then open the answer. These ten stay the same; the test draws new ones every time.

1. Water boils at about 98 °C at Murree. Why is this lower than 100 °C?

  1. A
    the vapour pressure of water is higher at Murree
  2. B
    the water there is purer
  3. C
    the external atmospheric pressure is lower
  4. D
    the air is colder
Show answer

Answer: C. At high altitude atmospheric pressure is lower, so water's vapour pressure equals it at a lower temperature.

2. Which of these is a molecular solid?

  1. A
    diamond
  2. B
    copper
  3. C
    ice
  4. D
    sodium chloride
Show answer

Answer: C. Ice is made of H2O molecules held by intermolecular (hydrogen) bonds. Diamond is covalent network, copper is metallic and NaCl is ionic.

3. Cholesteryl benzoate melts at 145 °C to a cloudy liquid that turns clear at 179 °C. Between these temperatures it is

  1. A
    a liquid crystal
  2. B
    a pure solid
  3. C
    an isotropic liquid
  4. D
    a vapour
Show answer

Answer: A. The cloudy phase between the melting point and the clearing point is the liquid crystal state; above 179 °C it becomes an ordinary clear liquid.

4. In the sodium chloride crystal, what is the coordination number of each ion?

  1. A
    8
  2. B
    4
  3. C
    12
  4. D
    6
Show answer

Answer: D. Each Na+ is surrounded octahedrally by 6 Cl− and each Cl− by 6 Na+. A coordination number of 8 is found in CsCl.

5. The vapour pressure of a liquid depends on

  1. A
    the amount of liquid taken
  2. B
    the surface area of the liquid
  3. C
    the temperature
  4. D
    the size of the container
Show answer

Answer: C. Vapour pressure depends only on the nature of the liquid and its temperature. Surface area changes the rate of evaporation, but not the equilibrium vapour pressure.

6. Crystalline solids are said to be anisotropic. This means that

  1. A
    they have no definite shape
  2. B
    some physical properties, such as refractive index or conductivity, differ in different directions
  3. C
    they melt over a range of temperature
  4. D
    their properties are the same in every direction
Show answer

Answer: B. The regular arrangement of particles differs along different directions, so properties depend on direction. Amorphous solids and liquids are isotropic.

7. Which hydride of group 16 has the highest boiling point?

  1. A
    H2Te
  2. B
    H2S
  3. C
    H2O
  4. D
    H2Se
Show answer

Answer: C. Water molecules are hydrogen bonded, so H2O boils at 100 °C, far above H2S, H2Se and H2Te, even though they are heavier.

8. Isomorphism is the property of

  1. A
    different substances having the same crystalline form
  2. B
    one substance existing in more than one crystalline form
  3. C
    an element existing in different forms in the same physical state
  4. D
    a substance changing form at a definite temperature
Show answer

Answer: A. Isomorphous substances, such as NaNO3 and CaCO3, have the same crystal form and the same atomic ratio. One substance in several forms is polymorphism.

9. A unit cell has edges a = b = c and all angles α = β = γ = 90°. To which crystal system does it belong?

  1. A
    tetragonal
  2. B
    rhombohedral
  3. C
    cubic
  4. D
    orthorhombic
Show answer

Answer: C. Equal edges and all right angles define the cubic system. Tetragonal has a = b ≠ c; rhombohedral has equal edges but angles not 90°.

10. The boiling points of the halogens increase from F2 to I2 because

  1. A
    hydrogen bonding increases down the group
  2. B
    the molecules become more polar
  3. C
    the covalent bond inside each molecule becomes stronger
  4. D
    larger molecules are more polarisable, so London forces become stronger
Show answer

Answer: D. Down the group the electron clouds get larger and more easily distorted, so instantaneous dipoles and London forces grow. Halogen molecules are non-polar.

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How many Liquids and solids MCQs are there?

32, each with the answer and a short explanation, across 3 topics: Intermolecular forces and hydrogen bonding, Evaporation, vapour pressure, boiling point and liquid crystals, Crystalline solids. Every chapter test draws ten of them, so you can take it many times.

Is the FSc Part 1 Chemistry chapter 4 test free?

Yes. The test, the answers and the explanations are free and need no sign-up. Sign in only if you want your scores kept across devices.

How is the chapter test marked?

The moment you press Finish: your score, the right answer and an explanation for every question, and the ones you got wrong saved in My mistakes to retry.

Can I read the explanations in Urdu?

Yes. In practice mode and on your results you can switch the explanations to Urdu.

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