Solutions MCQs with answers
Dear candidates you will find MCQ questions of 12th Class - Chemistry | Chapter: Solutions here. Learn these questions and prepare yourself for coming examinations. You can check the right answer of any question by clicking the option or by clicking view answer button.
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Q. The van’t Hoff factor (i) accounts for
✅ Correct Answer: (B)
the extent of dissociation of solute.
Q. People add sodium chloride to water while boiling eggs. This is to
✅ Correct Answer: (B)
increase the boiling point.
Q. Osmotic pressure of a solution is 0.0821 atm at a temperature of 300 K. The concentration in moles/litre will be
✅ Correct Answer: (C)
0.3 × 10-2
Q. The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows
✅ Correct Answer: (C)
positive deviation from Raoult’s Law.
Q. 4L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is ________ .
✅ Correct Answer: (D)
0.016
Q. Low concentration of oxygen in the blood and tissues of people living at high altitude is due to _________ .
✅ Correct Answer: (C)
low atmospheric pressure
Q. Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult’s law?
✅ Correct Answer: (A)
Methanol and acetone.
Q. Which of the following aqueous solutions should have the highest boiling point?
✅ Correct Answer: (D)
1.0 M Na2SO4
Q. In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl2 solution is _________ .
✅ Correct Answer: (C)
about three times
Q. An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because _________ .
✅ Correct Answer: (B)
it loses water due to reverse osmosis.
Q. The value of Henry’s constant KH is _________
✅ Correct Answer: (C)
greater for gases with lower solubility.
Q. Consider the figure and mark the correct option.
✅ Correct Answer: (B)
water will move from side (B) to side (A) if a pressure greater than osmotic , pressure is applied on piston (B).
Q. Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which are independent of temperature are
✅ Correct Answer: (C)
m, x
Q. Which of the following condition is not satisfied by an ideal solution?
✅ Correct Answer: (D)
Formation of an azeotropic mixture
Q. If molality of dilute solution is doubled, the value of molal depression constant (Kf) will be
✅ Correct Answer: (C)
unchanged
Q. At 100°C, the vapour pressure of a solution of 6.5 g of solute in 100 g of water is 732 mm. If Kb is 0.52 K/m, the boiling point of solution will be
✅ Correct Answer: (B)
101 °C
Q. What is mole fraction of solute in 1.00 m aqueous solution?
✅ Correct Answer: (B)
0.0177
Q. We have three aqueous solutions of NaCl labelled as ‘A’, ‘B’ and ‘C’ with concentrations 0.1M, 0.01M and 0.001M, respectively. The value of van’t Hoff factor for these solutions will be in the order __________ .
✅ Correct Answer: (C)
iA = iB = iC
Q. A solution containing 10 g per dm3 of urea (molar mass 60 g mol-1) is isotonic with 5% solution of non-volatile solute, MB of solute is
✅ Correct Answer: (A)
300 g mol-1
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