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Saturday, 31 October

JEE Main · Chemistry · Some Basic Concepts of Chemistry

Molarity Calculation

JEE Main asked Molarity Calculation 16 times in 16 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2023 and 2024. It belongs to Mole Concept, in Some Basic Concepts of Chemistry (Chemistry). The longest wait between two years asking it was 1 year. In 2020, 2021, 2022 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
16
in 16 shifts
Years
5 of 8
First asked
2020
last in 2024
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.150.30’170.17’200.28’210.07’220.07’230.14’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 8 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 3 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20243 of 18
  • 20231 of 12
  • 20222 of 24
  • 20218 of 24
  • 20202 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Molarity from mass percent and density
  • Molarity of solution

Difficulty

Easy 13Medium 3Hard 0

13 of the 16 questions had a numerical answer.

Every question

All 16 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 30 Jan 2024, Shift 1 · Q81The mass of sodium acetate (CH3COONa\mathrm{CH_3COONa}) required to prepare 250 mL of 0.35 M aqueous solution is ________ g. (Molar mass of…EasyNumerical value
  2. 29 Jan 2024, Shift 1 · Q81A solution of H2SO4\mathrm{H_2SO_4} is 31.4% H2SO4\mathrm{H_2SO_4} by mass and has a density of 1.25g/mL. The molarity of the H2SO4\mathrm{H_2SO_4}…EasyNumerical value
  3. 4 Apr 2024, Shift 1 · Q61The Molarity (M) of an aqueous solution containing 5.85 g of NaCl in 500 mL water is : (Given : Molar Mass Na : 23 and Cl : 35.5…EasySingle correct
  4. 10 Apr 2023, Shift 2 · Q80Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : 3.1500g of hydrated…EasyAssertion–reason
  5. 26 Jun 2022, Shift 1 · Q61A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is :…EasySingle correct
  6. 26 Jul 2022, Shift 1 · Q85When 800 mL of 0.5 M nitric acid is heated in a beaker, its volume is reduced to half and 11.5 g of nitric acid is evaporated. The…MediumNumerical value
  7. 18 Mar 2021, Shift 2 · Q5110.0 mL of Na2CO3\mathrm{Na_2CO_3} solution is titrated against 0.2 M HCl solution. The following titre values were obtained in 5 readings :…EasyNumerical value
  8. 22 Jul 2021, Shift 2 · Q51If the concentration of glucose (C6H12O6\mathrm{C_6H_{12}O_6}) in blood is 0.72 g L−1^{-1}, the molarity of glucose in blood is ________…EasyNumerical value
  9. 26 Feb 2021, Shift 2 · Q51The NaNO3\mathrm{NaNO_3} weighed out to make 50 mL of an aqueous solution containing 70.0 mg Na+\mathrm{Na^+} per mL is __________ g. (Rounded…MediumNumerical value
  10. 24 Feb 2021, Shift 1 · Q514.5 g of compound A (MW=90) was used to make 250 mL of its aqueous solution. The molarity of the solution in M is x×10−1x \times 10^{-1}. The…EasyNumerical value
  11. 31 Aug 2021, Shift 2 · Q51Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Neglecting the change…EasyNumerical value
  12. 31 Aug 2021, Shift 1 · Q51The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H2C2O4⋅2H2O\mathrm{H_2C_2O_4\cdot 2H_2O}) in 250 mL of water in mol…EasyNumerical value
  13. 26 Aug 2021, Shift 2 · Q51100 mL of Na3PO4\mathrm{Na_3PO_4} solution contains 3.45 g of sodium. The molarity of the solution is __________ ×10−2\times 10^{-2} mol…MediumNumerical value
  14. 4 Aug 2021, Shift 1 · Q51A solution of H2SO4\mathrm{H_2SO_4} has 30% H2SO4\mathrm{H_2SO_4} by mass and a density of 1.25 g mL−1^{-1}. The molarity of the solution is…EasyNumerical value
  15. 3 Sep 2020, Shift 2 · Q466.023×10226.023\times10^{22} molecules are present in 10 g of a substance ‘xx’. The molarity of a solution containing 5 g of substance ‘xx’ in 2…EasyNumerical value
  16. 9 Jan 2020, Shift 1 · Q46The molarity of HNO3\mathrm{HNO_3} in a sample which has density 1.4 g/mL and mass percentage of 63% is ________. (Molecular Weight of…EasyNumerical value

Shifts: 9 Jan 2020, Shift 1, 3 Sep 2020, Shift 2, 24 Feb 2021, Shift 1, 26 Feb 2021, Shift 2, 18 Mar 2021, Shift 2, 22 Jul 2021, Shift 2, 4 Aug 2021, Shift 1, 26 Aug 2021, Shift 2, 31 Aug 2021, Shift 2, 31 Aug 2021, Shift 1, 26 Jun 2022, Shift 1, 26 Jul 2022, Shift 1, 10 Apr 2023, Shift 2, 29 Jan 2024, Shift 1, 30 Jan 2024, Shift 1, 4 Apr 2024, Shift 1.

Same topic

Other ideas in Mole Concept

Mole Concept has 18 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas