Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Some Basic Concepts Of Chemistry - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
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Year-wise coverage for Some Basic Concepts Of Chemistry. Each bar uses a separate theme-derived color.
How the classified questions are distributed by difficulty.
MCQ, numerical, multiple-select and other formats found in these papers.
Top subjects by unique question coverage.
Top topics across the included previous year papers.
Top subtopics inside this exact selection.
Question coverage for the most populated papers. Every active PYP paper remains listed below.
Newest papers appear first. Sort by year, question coverage or name.
| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| WB JEE 2025 | 2025 | 1 | View paper |
| WB JEE 2023 | 2023 | 2 | View paper |
| WB JEE 2022 | 2022 | 4 | View paper |
| WB JEE 2021 | 2021 | 1 | View paper |
| WB JEE 2020 | 2020 | 4 | View paper |
| WB JEE 2019 | 2019 | 2 | View paper |
| WB JEE 2018 | 2018 | 2 | View paper |
| WB JEE 2017 | 2017 | 2 | View paper |
Practice every matching question in batches of 20, with every available option.
How much solid oxalic acid (Molecular weight 126) has to be weighed to prepare 100 ml. exactly 0.1 (N) oxalic acid solution in water?
1 mL of water has 25 drops. Let N0 be the Avogadro number. What is the number of molecules present in 1 drop of water ? (Density of water = 1 g/mL)
$${C_6}{H_6}(liq) + {{15} \over 2}{O_2}(g) \to 6C{O_2}(g) + 3{H_2}O(liq)$$
Benzene burns in oxygen according to the above equation. What is the volume of oxygen (at STP) needed for complete combustion of 39 gram of liquid benzene?
A metal (M) forms two oxides. The ratio M:O (by weight) in the two oxides are 25:4 and 25:6. The minimum value of atomic mass of M is
Arrange the following in order of increasing mass
I. 1 mole of N\(_2\)
II. 0.5 mole of O\(_3\)
III. \(3.011\times10^{23}\) molecules of O\(_2\)
IV. 0.5 gram atom of O\(_2\)
63 g of a compound (Mol. Wt. = 126) was dissolved in 500 g distilled water. The density of the resultant solution as 1.126 g/ml. The molarity of the solution is
How many oxygen atoms are present in 0.36 g of a drop of water at STP?