NEET Chemistry / AI question bank / NCERT Class 12 / Solutions
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.
Also called: colligative properties · Raoult's law · osmotic pressure
Questions
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- Q1Near 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
- Q2Equal-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
- Q3Which pair of liquids, on mixing, gives a solution showing negative deviation from Raoult's law?
Ideal and non-ideal solutionsEasySingle correct
- Q4Liquids 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
- Q5Dissolving 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
- Q6A 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
- Q7Two 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
- Q8Binary liquid mixtures can behave ideally or deviate from Raoult's law. Which of the statements below are correct?
Ideal and non-ideal solutionsMediumStatement based
- Q92.0 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
- Q10Liquids 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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