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Friday, 9 October

JEE Main Chemistry · Class 12

Surface Chemistry: JEE Main previous year questions

Surface Chemistry had 16 questions in the 42 JEE Main shifts Lumi analysed, about 0.5 a shift, asked in 15 of 42 shifts. It ranks 22 of 30 Chemistry chapters by questions; 0% of its questions were hard.

Questions
16
in 15 of 42 shifts
A shift, on average
0.5
of 25 Chemistry questions
Since 2024
-0.8
0.8 a shift in 2017–23, 0.0 in 2024–26
Numerical answer
5
31% of its questions

Year by year

How often it came

Questions in the analysed shifts of each year. Years differ in how many shifts Lumi analysed, so read the bars with the shift count.

Questions each year
0361’175’204’214’222’230’240’250’26

2017: 1 shifts · 2020: 4 shifts · 2021: 4 shifts · 2022: 4 shifts · 2023: 4 shifts · 2024: 8 shifts · 2025: 8 shifts · 2026: 9 shifts

Difficulty by year
  • 20171
  • 20205
  • 20214
  • 20224
  • 20232
  • 2024
  • 2025
  • 2026
  • Easy
  • Medium
  • Hard

Inside the chapter

Topics and the ideas that repeat

4 topics and 9 distinct ideas; 2 ideas were asked more than once. Most questions are single correct and conceptual.

Topics, by questions

3 questions had no close topic in our taxonomy and are counted for the chapter only.

Ideas asked most
2 repeat

Every question

All 16 Surface Chemistry questions

Newest first. Each opens with its options and the official answer.

2023 2 questions

  1. 6 Apr 2023, Shift 1 · Q87For the adsorption of hydrogen on platinum, the activation energy is 30 kJ mol−1^{-1} and for the adsorption of hydrogen on nickel, the…MediumNumerical value
  2. 8 Apr 2023, Shift 2 · Q87Coagulating value of the electrolytes AlCl3\mathrm{AlCl_3} and NaCl for As2S3\mathrm{As_2S_3} are 0.09 and 50.04 respectively. The coagulating…EasyNumerical value

2022 4 questions

  1. 25 Jul 2022, Shift 1 · Q65Match List - I with List - II List - I (A) N2(g)+3H2(g)→2NH3(g)\mathrm{N_2(g)+3H_2(g)\rightarrow2NH_3(g)} (B)…MediumMatch the list
  2. 28 Jul 2022, Shift 1 · Q64Match List - I with List - II. List - I (Reaction) | List - II (Catalyst) (A) 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)\mathrm{4NH_3(g)+5O_2(g)\to4NO(g)+6H_2O(g)} | (I) NO(g)…EasyMatch the list
  3. 24 Jun 2022, Shift 1 · Q65Given below are two statements : Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on…MediumTwo statements
  4. 29 Jun 2022, Shift 1 · Q65Which of the following is a correct statement ?EasySingle correct

2021 4 questions

  1. 3 Aug 2021, Shift 2 · Q58In an adsorption isotherm, it is seen that the graph of log⁡(xm)\log\left(\frac{x}{m}\right) vs log⁡P\log P, where PP is in atm, is a straight…MediumNumerical value
  2. 25 Jul 2021, Shift 1 · Q32Sodium stearate CH3(CH2)16COO−Na+\mathrm{CH_3(CH_2)_{16}COO^-Na^+} is an anionic surfactant which forms micelles in oil. Choose the correct statement for…MediumSingle correct
  3. 16 Mar 2021, Shift 2 · Q32The INCORRECT statements below regarding colloidal solutions is :EasySingle correct
  4. 18 Mar 2021, Shift 1 · Q33Match List - I with List - II : List - I (Process) (a) Deacon's process (b) Contact process (c) Cracking of hydrocarbons (d) Hydrogenation…MediumMatch the list

2020 5 questions

  1. 8 Jan 2020, Shift 1 · Q28As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :MediumSingle correct
  2. 9 Jan 2020, Shift 2 · Q29A mixture of gases O2\mathrm{O_2}, H2\mathrm{H_2} and CO\mathrm{CO} are taken in a closed vessel containing charcoal. The graph that…EasySingle correctHas a figure
  3. 2 Sep 2020, Shift 1 · Q28Which of the following is used for the preparation of colloids ?EasySingle correct
  4. 2 Sep 2020, Shift 1 · Q48The mass of gas adsorbed, xx, per unit mass of adsorbate, mm, was measured at various pressures, pp. A graph between log⁡xm\log\frac{x}{m}…MediumNumerical value
  5. 6 Sep 2020, Shift 2 · Q49For Freundlich adsorption isotherm, a plot of log⁡(x/m)\log(x/m) (yy-axis) and log⁡p\log p (xx-axis) gives a straight line. The intercept and…MediumNumerical value

2017 1 questions

  1. 2 Apr 2017 (offline) · Q34The Tyndall effect is observed only when following conditions are satisfied : (a) The diameter of the dispersed particles is much smaller…MediumOther

Pattern: Asked most years.