NEET Chemistry - New - Surface Chemistry

Buy NEET English 2025-New Practice test pack

Question - 1

Which one of the following statements is not correct?

  • A Catalyst does not initiate any reaction
  • B The value of equilibrium constant is changed in the presence of a catalyst in the reaction equilibrium
  • C Enzymes catalyze mainly biochemical reaction
  • D Coenzymes increase the catalytic activity of enzyme

Question - 2

Which one of the following characteristics is associated with adsorption?

  • A ∆G and ∆H are negative but ∆S is positive.
  • B ∆G and ∆S are negative but ∆H is positive
  • C ∆G is negative but ∆H and ∆S are positive
  • D ∆G, ∆H and ∆S all are negative

Question - 3

Which of the following statement is correct for the spontaneous adsorption of a gas?

  • A ∆S is negative and therefore, ∆H should be highly positive.
  • B ∆S is negative and therefore, ∆H should be highly negative.
  • C ∆S is positive and therefore, ∆H should be negative.
  • D ∆S is positive and therefore, ∆H should be highly positive.

Question - 4

In Freundlich adsorption isotherm, the value of 1/n is:

  • A between 0 and 1 in all cases
  • B between 2 and 4 in all cases
  • C 1 in cases of physical adsorption
  • D 1 in case of chemisorption

Question - 5

Which one of. the following statements is incorrect about enzyme catalysis?

  • A Enzymes are mostly proteinous in nature
  • B Enzyme action is specific
  • C Enzymes are denaturated by UV - rays and at high temperature
  • D Enzymes are least reactive at optimum temperature

Question - 6

If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process?

  • A \(\frac { x }{ m } \) = f (T) at constant p
  • B p = f (T) at constant \(\left( \frac { x }{ m } \right) \)
  • C \(\frac { x }{ m } \) = p x T
  • D \(\frac { x }{ m } \) = f (p) at constant T

Question - 7

The Langmuir adsorption isotherm is deduced by using the assumption that:

  • A the adsorption takes place in multi-layers
  • B the adsorption sites are equivalent in their ability to adsorb the particles.
  • C the heat of adsorption varies with coverage
  • D the adsorbed molecules interact with each other

Question - 8

On which of the following properties does the coagulating power of an ion depend?

  • A Both magnitude and sign of the charge on the ion
  • B Size of the ion alone
  • C The magnitude of the charge on the ion alone
  • D The sign of charge on the ion alone

Question - 9

The coagulation value in millimoles per liter of the electrolytes used for the coagulation of As2S3 are given below:
I. (NaCI) = 52 
II. (BaCI2) = 0.69
III. (MgSO4) = 0.22
The correct order of their coagulating power is

  • A I > II > III
  • B II > I > III
  • C III > II > I
  • D III > I > II

Question - 10

Fog is a colloidal solution of:

  • A Solid in gas
  • B gas in gas
  • C liquid in gas
  • D gas in liquid
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next