Solutions: JEE Main Chemistry Previous Year Questions

419 previous year questions from Solutions. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $The freezing point of a diluted milk sample is found to be - 0.2° C, while it should have been - 0.5° C for pure milk. How much water has been added to pure milk to make\dots$
2. $K_{f} for water is 1.86 K kg m o l^{-1} . If your automobile radiator holds 1.0 kg of water, how may grams of ethylene glycol (C_{2} H_{6} O_{2}) must you add to get the\dots$
3. $If aqueous solution contains 9 % and 1 % (w / w) of two non-volatile non-electrolytes X (molecular weight 180) and Y (molecular weigh\dots$
4. $A 6 % solution of urea is isotonic with$
5. $Mass of ethylene glycol (antifreeze) to be added to 18.6 kg of water to protect the freezing point at - 24^{\circ} C is______kg (Molar mass in\dots$
6. $Consider a solution of CO_{2} (g) dissolved in water in a closed container. Which one of the following plots correctly represents variation of\dots$
7. $The Molarity (M) of an aqueous solution containing 5.85 g of NaCl in 500 mL water is : (Given : Molar Mass Na : 23 and\dots$
8. $At T (K) \times g of a non-volatile solid (molar mass 78 g mol^{- 1}) when added to 0.5 kg water, lowered its freezing\dots$
9. $200 m L of an aqueous solution of a protein contains its 1.26 g . The osmotic pressure of this solution at 300 K is found to be 2.57 \times 1 0^{- 3} bar. The molar mass\dots$
10. $Which of the following pair of solutions is isotonic? A. 18 g / L of glucose of solution and 6 g / L of Urea solution B. 10 g / L of glucose solution\dots$
11. $A solution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows$
12. $Assertion (A) : For an endothermic dissolution process, increase in temperature increases the solubility in a nearly saturated solution. Reason (R) : In saturated solution\dots$
13. $If the K_{H} values for Ar (g), CO_{2} (g), HCHO (g) and\dots$
14. $A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B . The vapour pressure of pure A is 200 mm Hg and that of the solution is\dots$
15. $At 298 K, if the vapour pressure of pure liquids toluene, benzene, chloroform and dichloromethane are 60,160 , 200 and 415 torr respectively. Then which liquid is havin\dots$
16. $Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses the freezing point by 0.2°C. The percentage association of solute A in\dots$
17. $8 g of NaOH is dissolved in 18 g of . Mole fraction of NaOH in solution and molality (in mol) of the solution respectively are :$
18. $0.5 molal aqueous solution of a weak acid (^{H X}) is 20% ionised. If K_{f} for water is 1.86 K kg m o 1^{- 1}, the lowering in freezing point of the solution is$
19. $What is the boiling point of solution of 0.1 mKCl ? K_{b} of water is\dots$
20. $The mixture which shows positive deviation from Raoult's law is:$
21. $Liquid ‘M’ and liquid ‘N’ form an ideal solution. The vapour pressures of pure liquids ‘M’ and ‘N’ are 450 and 700 mmHg, respectively, at the same temperature. Then corre\dots$
22. $When 20 g of naphthoic acid (C_{11} H_{8} O_{2}) is dissolved in 50 g of benzene (K_{f} = 1.72 K kg m o l^{-1}), a freezing point depression of 2 K is observed. The van\dots$
23. $The elevation of boiling point of 0.10 m aqueous CrCl_{3} \cdot xNH_{3} solution is two times that of 0.05 m aqueous CaCl_{2} solution.\dots$
24. $The vapour pressure of a solvent decreased by 10 mm ofmercury when a non‐volatile solute was added to the solvent. The mole fraction ofthe solute in the solution is 0.2.…$
25. $15 % aqueous solution of glucose (molecular weight = 180 g / mol) is isotonic with 8 % aqueous solution containing an unknown non-dissoc\dots$

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Solutions: JEE Main Chemistry Previous Year Questions

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