JEE Chemistry

Mole Concept: JEE Questions & Solutions

11 previous-year JEE Chemistry questions on Mole Concept, each with a worked step-by-step solution.

Intermediate

Previous-year questions

  1. 012.8 × 10⁻³ mol of CO₂ is left after removing 10²¹ molecules from its ‘x’ mg sample. The mass of CO₂ taken initially is: Given: N_A = 6.02 ×…MCQEasyJEE 2025
  2. 020.1 mole of compound S will weigh g, (given the molar mass in g mol⁻¹ C = 12, H = 1, O = 16):NVAEasyJEE 2025
  3. 030.1 mol of the following given antiviral compound (P) will weigh × 10⁻¹ g (nearest integer). (Given: molar mass in g mol⁻¹ — H: 1, C: 12,…NVAEasyJEE 2025
  4. 04Among 10⁻⁹ g (each) of the following elements, which one will have the highest number of atoms? Element: Pb, Po, Pr and PtMCQEasyJEE 2025
  5. 05At the sea level, the dry air mass percentage composition is given as nitrogen gas: 70.0, oxygen gas: 27.0, and argon gas: 3.0. If the…MCQMediumJEE 2025
  6. 06A 0.05 cm thick coating of silver is deposited on a plate of 0.05 m² area. The number of silver atoms deposited on the plate is × 10²³ (At.…NVAEasyJEE 2024
  7. 07When 0.01 mol of an organic compound containing 60% carbon was burnt completely, 4.4 g of CO₂ was produced. The molar mass of the compound…NVAEasyJEE 2023
  8. 08The volume of HCl containing 73 g L⁻¹, required to completely neutralize NaOH obtained by reacting 0.69 g of metallic sodium with water, is…NVAEasyJEE 2023
  9. 09The number of molecules and moles in 2.8375 litres of O₂ at STP are respectively:MCQEasyJEE 2023
  10. 10Match List I with List II | LIST I | LIST II | |---|---| | (A) 16 g of CH₄(g) | (I) Weight 28 g | | (B) 1 g of H₂(g) | (II) 60.2 × 10²³…MCQMediumJEE 2023
  11. 111 g of a carbonate (M₂CO₃) on treatment with excess HCl produces 0.01 mol of CO₂. The molar mass of M₂CO₃ is g mol⁻¹ (Nearest integer).NVAEasyJEE 2023

Frequently asked questions

Our bank has 11 previous-year JEE Chemistry questions tagged to Mole Concept, drawn from JEE papers between 2023 and 2025, including 5 from 2025 alone. Each comes with a full step-by-step solution.

Mole Concept is rated Intermediate overall for JEE Chemistry. The PYQs on this page break down as 9 easy, 2 medium.

Of the 11 previous-year questions on Mole Concept, 5 are multiple-choice (MCQ) and 6 are numerical-value (NVA) questions.

Based on recent paper analysis, Mole Concept is worth about 1 mark in JEE Main. It sits in Some Basic Concepts of Chemistry, a Class 11 Chemistry chapter.

More Some Basic Concepts of Chemistry topics

Stoichiometry & Calculations57Laws of Chemical Combination1Dalton's Atomic Theory0

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