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#	Question	Subject and topic	Difficulty
1	Which of these concentration terms changes when the temperature of a solution changes?	Chemistry Types of solutions and concentration	Easy
2	What is the molarity of a solution made by dissolving 4 g of NaOH in enough water to give 250 mL of solution?…	Chemistry Types of solutions and concentration	Easy
3	9 g of glucose (molar mass 180 g mol⁻¹) is dissolved in 500 g of water. What is the molality of the solution?	Chemistry Types of solutions and concentration	Medium
4	A solution contains 1 mol of ethanol and 4 mol of water. What is the mole fraction of ethanol?	Chemistry Types of solutions and concentration	Medium
5	Hydrogen gas absorbed in palladium metal is an example of which type of solution?	Chemistry Types of solutions and concentration	Hard
6	According to Henry's law, what happens to the solubility of a gas in water if its partial pressure is tripled…	Chemistry Solubility and Henry’s law	Easy
7	Why does a bottle of soda water fizz when it is opened?	Chemistry Solubility and Henry’s law	Easy
8	At a given temperature, four gases have Henry's law constants (in kbar) of 0.4, 1.7, 34 and 76.5. Which gas i…	Chemistry Solubility and Henry’s law	Medium
9	Why are the air tanks used by scuba divers diluted with helium?	Chemistry Solubility and Henry’s law	Medium
10	The dissolution of a certain solid in water is endothermic. How will its solubility change as the temperature…	Chemistry Solubility and Henry’s law	Hard
11	Which pair of liquids forms a nearly ideal solution?	Chemistry Vapour pressure and Raoult’s law	Easy
12	Which statement about a solution showing negative deviation from Raoult's law is correct?	Chemistry Vapour pressure and Raoult’s law	Easy
13	Liquids A and B form an ideal solution. p_A° = 400 mm Hg and p_B° = 200 mm Hg. What is the total vapour press…	Chemistry Vapour pressure and Raoult’s law	Medium
14	For the solution in which p_A° = 400 mm Hg, p_B° = 200 mm Hg and x_A = 0.25, what is the mole fraction of A i…	Chemistry Vapour pressure and Raoult’s law	Hard
15	Why can a 95% ethanol–water mixture not be made purer by simple fractional distillation?	Chemistry Vapour pressure and Raoult’s law	Medium
16	Which of these is NOT a colligative property?	Chemistry Colligative properties	Easy
17	What is the elevation in boiling point of a 0.5 mol kg⁻¹ aqueous solution of urea? (Kb of water = 0.52 K kg m…	Chemistry Colligative properties	Easy
18	What is the osmotic pressure of a 0.1 M solution of a non-electrolyte at 300 K? (R = 0.0821 L atm K⁻¹ mol⁻¹)	Chemistry Colligative properties	Medium
19	What happens to red blood cells placed in a solution with a salt concentration higher than that of blood plas…	Chemistry Colligative properties	Medium
20	In reverse osmosis used to desalinate seawater, what must be true of the pressure applied on the seawater sid…	Chemistry Colligative properties	Hard