Ques. 1JEE Main 2024, 9 April (Evening Shift)
[figure] In the given TLC, the distance of spot A & B are 5 cm & 7 cm, from the bottom of TLC plate, respectively. Rf value of B is x 10-1 times more than A. The value of x is .
Principles Related to Practical Chemistry
Previous year questions with solutions · 2024 – 2026
115Questions
58Papers covered
7.37%Weightage 2026▲ 9.4% vs last year
’24
’25
’26
Year-wise statistics questions · papers · average per paper · weightage
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 35 | 19 | 1.8 | 7.37% ▲ 9.4% vs last year |
| 2025 | 32 | 19 | 1.7 | 6.74% ▼ 15.6% vs last year |
| 2024 | 48 | 21 | 2.3 | 7.99% |
Ques. 2JEE Main 2024, 5 April (Evening Shift)
Using the given figure, the ratio of Rf values of sample A and sample C is x 10-2. Value of x is . [figure]
Ques. 3JEE Main 2024, 30 January (Morning Shift)
On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the solvent moved by 5 cm. The retardation factor of the organic compound is 10-1.