29 JEE Main 2021 Solutions previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Solutions chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Solutions chapter hub.
In a solvent 50 % of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is _____ × 1…
At 363   K , the vapour pressure of A is 21   kPa and that of B is 18 kPa . One mole of A and 2 moles of B ar…
1 molal aqueous solution of an electrolyte A 2   B 3 is 60 % ionised. The boiling point of the solution at 1  …
When 12 . 2   g of benzoic acid is dissolved in 100   g of water, the freezing point of solution was found to…
At 20 ° C , the vapour pressure of benzene is 70 torr and that of methyl benzene is 20 torr. The mole fraction of…
CO 2 gas is bubbled through water during a soft drink manufacturing process at 298   K . If CO 2 exerts a partial…
If a compound AB dissociates to the extent of 75 % in an aqueous solution, the molality of the solution which shows a 2…
The molarity of the solution prepared by dissolving 6 . 3   g of oxalic acid H 2 C 2 O 4 · 2 H 2 O in 250 …
When 3 . 00   g of a substance X ' is dissolved in 100   g of CCl 4 , it raises the boiling point by 0 . 60 &…
The oxygen dissolved in water exerts a partial pressure of 20   kPa in the vapour above water. The molar solubilit…
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