Chemistry MCQs Online Quiz Test 30

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Solved Thermodynamics MCQs Online Quiz Test

Q.1: Steam causes more sever burn than the boiling water because it possesses ———?

  1. Latent heat of fusion
  2. Latent heat of sublimation
  3. Latent heat of vaporization
  4. All of the above


Q.2: The conversion of vapours back into their liquid state is called———?

  1. crystallization
  2. evaporization
  3. vaporization
  4. condensation


Q.3: When water freezes at 0°C its density decreases due to——–?

  1. Change of bond angles
  2. Cubic structure of ice
  3. Change of bond length
  4. Empty space present in the structure of ice


Q.4: The boiling point increases down the zero group element due to———?

  1. Ion dipole forces
  2. London forces
  3. Hydrogen bonding
  4. Dipole dipole forces


Q.5: Rising of a wetting liquid in a capillary tube is due to———?

  1. Surface tension
  2. Cohesive forces
  3. Adhesive forces
  4. viscosity


Q.6: The number of formula units in 29.25g of common salt———?

  1. 6.022 x 1023
  2. 2 x NA
  3. 4 x 6.022 x 1023
  4. 3.01 x 1023


Q.7: Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it ?

  1. Liquid do not have definite shape
  2. Liquid do not have definite volume
  3. Lieuid is highly compressible
  4. Liquid molecules can slide over each other


Q.8: Molar heat of vaporization of water is———?

  1. 40.7 KJ/mole
  2. 40.7 J/mole
  3. 40.7 cal/mole
  4. 40.7 Kcal/mole


Q.9: Crystallites are present in———?

  1. crystalline solids
  2. amorphous solids
  3. liquid crystals
  4. all of the above


Q.10: A malleable solid is one which can be———?

  1. Converted into wires
  2. Melted easily
  3. All of the above
  4. Converted into thin sheets