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Surface Chemistry · Question 3

NEET (UG) 2022MCQEasy📈 Topic in 25% papers+4−1
1

Given below are two statements In the light of the above statements, choose the most appropriate answer from the options given below

  1. Both Statement I and Statement II are correct.
  2. Both Statement I and Statement II are incorrect.
  3. Statement I is correct but Statement II is incorrect.
  4. Statement I is incorrect but Statement II is correct.

Answer

(3) Statement I is correct but Statement II is incorrect.

Solution

Hardy–Schulze rule: the greater the valence of the flocculating ion added, the greater is its power to cause precipitation.

Statement I: A negative sol is coagulated by cations; as per NCERT the order is Al3+ > Ba2+ > Na+. Correct.

Statement II: A positive sol is coagulated by anions: PO43- > SO42- > Cl-

the order of the salts is Na3PO4 > Na2SO4 > NaCl, the reverse of the given order. Incorrect.

Answer: (3)

Out of syllabusNEET (UG) 2022

Keep practising — Surface Chemistry

2

Shown below are adsorption isotherms for a gas 'X' at temperatures T1, T2 and T3 : [figure] p and xm represent pressure and extent of adsorption, respectively. The correct order of temperatures for the given adsorption is :

  1. T1 = T2 > T3
  2. T1 > T2 > T3
  3. T3 > T2 > T1
  4. T1 = T2 = T3
Out of syllabusNEET (UG) 2022 (Phase 2)
3

The right option for the statement "Tyndall effect is exhibited by", is :

  1. Urea solution
  2. NaCl solution
  3. Glucose solution
  4. Starch solution
Out of syllabusNEET (UG) 2021
4

Measuring Zeta potential is useful in determining which property of colloidal solution?

  1. Solubility
  2. Stability of the colloidal particles
  3. Size of the colloidal particles
  4. Viscosity
Out of syllabusNEET (UG) 2020
5

Which mixture of the solution will lead to the formation of negatively charged colloidal [AgI] I- sol. ?

  1. 50 mL of 2 M AgNO3 + 50 mL of 1.5 M KI
  2. 50 mL of 0.1 M AgNO3 + 50 mL of 0.1 M KI
  3. 50 mL of 1 M AgNO3 + 50 mL of 1.5 M KI
  4. 50 mL of 1 M AgNO3 + 50 mL of 2 M KI
Out of syllabusNEET (UG) 2019
6

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

  1. The magnitude of the charge on the ion alone
  2. Size of the ion alone
  3. Both magnitude and sign of the charge on the ion
  4. The sign of charge on the ion alone
Out of syllabusNEET 2018
7

Which one of the following statements is not correct?

  1. The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium.
  2. Enzymes catalyse mainly bio-chemical reactions.
  3. Coenzymes increase the catalytic activity of enzyme.
  4. Catalyst does not initiate any reaction.
Out of syllabusNEET 2017
8

Fog is a colloidal solution of

  1. solid in gas
  2. gas in gas
  3. liquid in gas
  4. gas in liquid.
Out of syllabusNEET 2016 (Phase 1)
9

Which one of the following characteristics is associated with adsorption?

  1. G and H are negative but S is positive.
  2. G and S are negative but H is positive.
  3. G is negative but H and S are positive.
  4. G, H and S all are negative.
Out of syllabusNEET 2016 (Phase 1)
10

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3 are given below : I. (NaCl) = 52, II. (BaCl2) = 0.69, III. (MgSO4) = 0.22 The correct order of their coagulating power is

  1. I > II > III
  2. II > I > III
  3. III > II > I
  4. III > I > II
Out of syllabusNEET 2016 (Phase 2)
11

Which property of colloidal solution is independent of charge on the colloidal particles?

  1. Electro-osmosis
  2. Tyndall effect
  3. Coagulation
  4. Electrophoresis
Out of syllabusAIPMT 2015 (Cancelled)

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