NEET Surface Chemistry PYQ practice sheet

4 previous-year NEET Chemistry questions from Surface Chemistry, newest papers first. Surface Chemistry carries 5 of the Chemistry questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   NEET 2023

   Which one is an example of heterogenous catalysis?

   • (A)
     Combination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron.
   • (B)
     Oxidation of sulphur dioxide into sulphur trioxide in the presence of oxides of nitrogen.
   • (C)
     Hydrolysis of sugar catalysed by $\mathrm{H^+}$ ions.
   • (D)
     Decomposition of ozone in presence of nitrogen monoxide.
2. 2.

   NEET 2022

   Given below are two statements: Statement I: In the coagulation of a negative sol, the flocculating power of the three given ions is in the order $\mathrm{Al^{3+}>Ba^{2+}>Na^{+}}$. Statement II: In the coagulation of a positive sol, the flocculating power of the three given salts is in the order $\mathrm{NaCl>Na_2SO_4>Na_3PO_4}$. In the light of the above statements, choose the most appropriate answer from the options given below:

   • (A)
     Statement I is incorrect but Statement II is correct.
   • (B)
     Both Statement I and Statement II are correct.
   • (C)
     Both Statement I and Statement II are incorrect.
   • (D)
     Statement I is correct but Statement II is incorrect.
3. 3.

   NEET 2021

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

   • (A)
     Glucose solution
   • (B)
     Starch solution
   • (C)
     NaCl solution
   • (D)
     Urea solution
4. 4.

   NEET 2020

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

   • (A)
     Viscosity
   • (B)
     Solubility
   • (C)
     Stability of the colloidal particles
   • (D)
     Size of the colloidal particles