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ICSE Class 8 Chemistry Question 12 of 13

Matter — Question 3

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Question 3

Complete the statements by filling the blanks with the correct word from the bracket.

  1. In naphthalene, the inter-particle attraction is ............... [high/low].

  2. The law of conservation of mass, is strictly valid if mass and ............... [energy/volume] are considered together.

  3. When inter-particle space increases, the inter-particle attractive force ............... [decreases/increases]

  4. Kinetic energy of molecules in helium is ............... [large/very large] compared to the kinetic energy of molecules in water.

  5. Conversion of vapour [or gas] into a liquid is termed ............... [liquefaction/vaporization].

Answer

  1. In naphthalene, the inter-particle attraction is low.

  2. The law of conservation of mass, is strictly valid if mass and energy are considered together.

  3. When inter-particle space increases, the inter-particle attractive force decreases.

  4. Kinetic energy of molecules in helium is very large compared to the kinetic energy of molecules in water.

  5. Conversion of vapour [or gas] into a liquid is termed liquefaction.