CBSE  /  Class 12  /  Chemistry  /  Surface Chemistry

  • 1. 
    Volume of one mole of any gas at NTP is

  • 11.2 litre
  • 22.4 litre
  • 10.2 litre
  • 22.8 litre

  • 2. 
    Tyndall effect confirms the

  • gravity effect on the sol. particles
  • light scattering by the sol. particles
  • heterogeneous nature of sols.
  • Brownian motion of the sol. particles

  • 3. 
    Which one of the following is alyophilic colloid?

  • Milk
  • Gum
  • Fog
  • Blood

  • 4. 
    Which of the following is not correct for enzyme catalysis?

  • The enzyme activity is maximum at optimum pH which is between 5-7
  • Each enzyme is specific for a given reaction
  • The favourable temperature range of enzyme activity is between 25-37°C
  • The enzymatic activity is increased in presence of certain substances.called co-enzymes

  • 5. 
    Presence of traces of arsenious oxide (As

  • catalytic promoter
  • catalytic poison
  • dehydrating agent
  • drying agent

  • 6. 
    (b)

  • 7. 
    Shape selective catalysis is a reaction catalysed by

  • zeolite
  • enzymes
  • platinum
  • Ziegler-Natta catalyst

  • 8. 
    Which of the following types of metals make the most efficient catalyst?

  • Alkali metals
  • Transition metals
  • Inner transition metals
  • Alkaline earth metals

  • 9. 
    The oxide of nitrogen which acts as a catalyst in lead chamber process is

  • NO
  • NO
  • N
  • H

  • 10. 
    The activity of an enzyme becomes ineffective

  • at low temperature
  • at atmospheric pressure
  • at high temperature
  • in aqueous medium
Report Question
warning
Practice More On Surface Chemistry
Quiz 1 Quiz 2 Quiz 3
access_time
  Time