Ques. 61JEE Main 2024, 30 January (Morning Shift)
0.05 cm thick coating of silver is deposited on a plate of 0.05 m2 area. The number of silver atoms deposited on plate are 1023. (At mass Ag = 108, d = 7.9 g cm-3)
Some Basic Concepts of Chemistry
Previous year questions with solutions · 2024 – 2026
65Questions
52Papers covered
3.79%Weightage 2026▼ 33.3% vs last year
’24
’25
’26
Year-wise statistics questions · papers · average per paper · weightage
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 18 | 19 | 0.95 | 3.79% ▼ 33.3% vs last year |
| 2025 | 27 | 19 | 1.4 | 5.68% ▲ 70.8% vs last year |
| 2024 | 20 | 21 | 0.95 | 3.33% |
Ques. 62JEE Main 2024, 29 January (Morning Shift)
A solution of H2SO4 is 31.4% H2SO4 by mass and has a density of 1.25 g/mL. The molarity of the H2SO4 solution is M (nearest integer) [Given molar mass of H2SO4 = 98 g mol-1]
Ques. 63JEE Main 2024, 29 January (Evening Shift)
If 50 mL of 0.5 M oxalic acid is required to neutralise 25 mL of NaOH solution, the amount of NaOH in 50 mL of given NaOH solution is g.
Ques. 64JEE Main 2024, 27 January (Morning Shift)
Mass of methane required to produce 22 g of CO2 after complete combustion is g. (Given Molar mass in g mol-1 C = 12.0, H = 1.0, O = 16.0)
Ques. 65JEE Main 2024, 27 January (Evening Shift)
Volume of 3M NaOH (formula weight 40 g mol-1) which can be prepared from 84 g of NaOH is 10-1dm3.