NEET ChemistryNCERT Class 12Solutions

Solutions: NEET questions with solutions

NEET tests Henry's and Raoult's laws, ideal versus non-ideal behaviour with the classic examples, and the four colligative properties with the van't Hoff factor. Marks are lost by forgetting the ×1000 in molality-based formulas, swapping liquid and vapour mole fractions, reading a large K_H as high solubility, and using i > 1 for an associating solute.

Revise first: NCERT notes for Solutions

Questions

10 questions · answers after you pick

1Near room temperature, the Henry's law constant K_H of CO₂ in water is much smaller than that of N₂. What does this tell you, with p =…Henry's lawEasySingle correct 2Equal-molality (0.05 m) aqueous solutions of four solutes are cooled. Assuming complete dissociation of electrolytes, which solution freezes…Abnormal molar masses and van't Hoff factorEasySingle correct 3Which pair of liquids, on mixing, gives a solution showing negative deviation from Raoult's law?Ideal and non-ideal solutionsEasySingle correct 4Liquids A and B form an ideal solution. At 300 K, p°A = 450 mm Hg and p°B = 150 mm Hg. What is the total vapour pressure of a solution in…Vapour pressure of liquid–liquid solutionsMediumSingle correct 5Dissolving 1.20 g of a non-volatile, non-electrolyte solid in 50.0 g of benzene raises the boiling point by 0.30 K. K_b for benzene is 2.53…Elevation of boiling pointMediumSingle correct 6A solution of 2.0 g of a synthetic polymer in enough water to make 250 mL shows an osmotic pressure of 4.0 × 10⁻³ bar at 300 K. Using R =…Osmotic pressureMediumSingle correct 7Two aqueous solutions, 0.1 M NaCl and 0.1 M glucose, are compared at the same temperature. Judge the Assertion (A) and the Reason (R) below.Abnormal molar masses and van't Hoff factorMediumAssertion–Reason 8Binary liquid mixtures can behave ideally or deviate from Raoult's law. Which of the statements below are correct?Ideal and non-ideal solutionsMediumStatement based 92.0 g of ethanoic acid (M = 60 g mol⁻¹) dissolved in 100 g of benzene lowers its freezing point by 0.94 K. K_f for benzene is 5.12 K kg…Abnormal molar masses and van't Hoff factorHardSingle correct 10Liquids X and Y form an ideal solution with p°X = 400 mm Hg and p°Y = 100 mm Hg at a certain temperature. The vapour in equilibrium with a…Vapour pressure of liquid–liquid solutionsHardSingle correct

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