Jump to a section

Chemistry - Surface Chemistry

Practise 34 AIIMS previous year questions on Surface Chemistry, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Surface Chemistry has been asked in 17 of the 19 years of AIIMS papers analysed (2001–2019), with 34 questions in all. 71% of them were easy, 24% moderate and 6% tough. Most of its questions came from 2018, with 4 questions that year. In the last three years (2017–2019) it had 8 questions across 5 papers, about 1.6 per paper.

The chapter's 7 topics are not weighted equally: Properties of colloidal solution (11 questions, 32%), Catalysis and Theories of Catalysis (8 questions, 24%), and Colloids (6 questions, 18%) have been asked the most. Catalysis and Theories of Catalysis has produced the most tough questions (1).

  1. 1Which of the following statements is incorrect about colloidal solution?25 May, 2019Colloids
  2. 2Assertion : Lyophilic colloid protects lyophobic colloid. Reason : Lyophilic colloid particles cover up the particles of the lyophobic collo25 May, 2019Colloids
  3. 3Assertion : On passing electric current in colloidal solution they do not move towards anode or cathode. Reason : They do not contain any ch27 May, 2018Properties of colloidal solution
  4. 4Assertion : Soap is mixed to form O/W emulsion. Reason : Soap reduces surface tension.27 May, 2018Emulsions and Gels
  5. 5Which of the following statements is incorrect?26 May, 2018Properties of colloidal solution
  6. 6Assertion : and colloidal sols on mixing precipitate. Reason : and combine and form precipitate of new composition.26 May, 2018Properties of colloidal solution
  7. 7The coagulation of of a positive colloid took place when was added to it without changing the volume much. The flocculation value of for the2017Properties of colloidal solution
  8. 8Assertion : Activity of an enzyme is -dependent. Reason : Change in affects the solubility of the enzyme in water.2017Catalysis and Theories of Catalysis
  9. 9Paints and hair creams are respectively2016Colloids
  10. 10A colloidal solution is kept in dark and is illuminated by a beam of light then, brightness appears at the right angle of direction of light2015Properties of colloidal solution
  11. 11Assertion: can be used for coagulation of sol. Reason: reacts with to give .2015Properties of colloidal solution
  12. 12Purification of colloids is done by2014Preparation and Purification of colloids
  13. 13Which one of the following is an example for homogeneous catalysis?2014Catalysis and Theories of Catalysis
  14. 14Assertion : Coagulation power of is more than . Reason: Greater the valency of the flocculating ion added, greater is its power to cause pre2014Properties of colloidal solution
  15. 15Hair cream is2013Colloids
  16. 16According to Hardy schulze law, the flocculating power of an ion increases with2013Properties of colloidal solution
  17. 17Assertion : Catalyst changes Gibbs free energy of system. Reason : Catalyst changes pre-exponential factor of a chemical reaction.2013Catalysis and Theories of Catalysis
  18. 18A colloidal solution is kept in dark and is illuminated by a beam of light then brightness appears at the right angle of direction of light.2012Properties of colloidal solution
  19. 19Which of the following is incorrect for physisorption?2011Adsorption
  20. 20Butter is an example of which type of colloid?2010Colloids
  21. 21Correct equation of Freundlich isotherm is2008Adsorption isotherms
  22. 22A catalyst2007Catalysis and Theories of Catalysis
  23. 23Assertion : can be used for coagulation of sol. Reason : reacts with to give .2006Properties of colloidal solution
  24. 24Assertion : Aqueous gold colloidal solution is red in colour. Reason : The colour arises due to scattering of light by colloidal gold partic2004Properties of colloidal solution
  25. 25Assertion : Alcohols are dehydrated to hydrocarbons in the presence of acidic zeolites. Reason : Zeolites are porous catalysts.2004Catalysis and Theories of Catalysis
  26. 26Assertion : Haemoglobin is an oxygen carrier. Reason : Oxygen binds as to of haemoglobin.2003Catalysis and Theories of Catalysis
  27. 27Assertion : Activity of an enzyme is dependent. Reason : Change in affects the solubility of the enzyme in water.2003Catalysis and Theories of Catalysis
  28. 28Assertion : The micelle formed by sodium stearate in water has groups at the surface. Reason : Surface tension of water is reduced by the ad2003Preparation and Purification of colloids
  29. 29Enzymes with two sites are called2002Catalysis and Theories of Catalysis
  30. 30The size of colloidal particle is2002Colloids
  31. 31Assertion : Physical absorption of molecules takes place on surface only. Reason : In this process, the bonds of the absorbed molecules are 2002Adsorption
  32. 32Assertion : An increase in surface area increases the rate of evaporation. Reason : Stronger the inter-molecular attractive forces, fast is 2002Adsorption
  33. 33A packet of colloidal system is taken in which colloidal particles are still. Two electrodes are taken in system and voltage is applied so t2001Preparation and Purification of colloids
  34. 34Correct equation of Freundrich isotherm is2001Adsorption isotherms

Frequently Asked Questions

1.How many questions are available for Surface Chemistry?

This chapter includes 34 questions compiled from AIIMS papers spanning 2001 to 2019.

2.Are these questions only from AIIMS, or from other exams too?

These are AIIMS questions specifically for the Surface Chemistry chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Surface Chemistry an important chapter for AIIMS Chemistry?

Surface Chemistry has appeared in 17 of the 19 years of AIIMS papers covered here, with 34 questions across 18 papers - about 2 per paper it appears in.

4.What is the difficulty level of Surface Chemistry questions in AIIMS?

Of the 34 questions analysed for this chapter, 71% are easy, 24% moderate and 6% tough. 2018 had the most, with 4 questions.

5.Which topics in Surface Chemistry should I focus on?

These topics have carried the most weightage in Surface Chemistry:

  • Properties of colloidal solution - 11 questions (32%)
  • Catalysis and Theories of Catalysis - 8 questions (24%)
  • Colloids - 6 questions (18%)
  • Catalysis and Theories of Catalysis has produced the most tough questions (1).
6.Is Surface Chemistry's weightage in AIIMS going up or down?

Across all 18 papers analysed, Surface Chemistry has averaged about 1.9 questions per paper. In the last three years (2017–2019), that average has fallen, at about 1.6 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.