Chemistry questions
29404 published questions with worked solutions.
- At 80 ℃, the vapour pressure of pure liquid 'A' is 520 mmHg and that of pure liquid 'B' is 1000 mm Hg. If a mixture solution of...
- Relative lowering of vapour pressure of a dilute solution is 0.2. What is the mole fraction of the non-volatile solute?
- Which of the following will show a negative deviation from Raoult's law?
- In the mixture of A and B, the mole fraction of vapours A above the solution will be [p_A^ = 100 mm, p_B^ = 200 mm]
- In which case Raoult's law is not applicable?
- Which of the following liquid pairs shows a positive deviation from Raoult's law?
- If two substances A and B have p_A^ : p_B^ = 1 : 2 and have mole fraction in solution 1 : 2 then mole fraction of A in vapours is
- "Relative lowering in vapour pressure of solution containing non-volatile solute is directly proportional to mole fraction of...
- The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A non-volatile, non-electrolyte solute weighing 2.175 g,...
- If M is molecular weight of solvent, K_b is molal elevation constant, T_b is its boiling point, p^ is its vapour pressure at...
- Solute is non-volatile and solvent molecule is volatile. Which of the following has maximum contribution in vapour phase?
- When two liquids A and B are mixed then their boiling points becomes greater than both of them. What is the nature of this...
- Vapour pressure of CCl_4 at 25 ℃ is 143 mm of Hg and 0.5 g of a non-volatile solute (mol. wt. = 65) is dissolved in 100 mL CCl_4...
- The vapour pressure of two liquids P and Q are 100 and 50 torr, respectively. The total vapour pressure of solution obtained by...
- At 40 ℃, the vapour pressure of pure liquids, benzene and toluene, are 160 mmHg and 60 mm Hg respectively. At the same...
- The solution which shows large positive deviation from Raoult's law form
- What happens to freezing point of benzene when naphthalene is added?
- A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (molar mass = 60 g mol^ -1 ) in the same solvent. If the...
- The difference between the boiling point and freezing point of an aqueous solution containing sucrose (mol. wt. = 342 g mol^ -1 )...
- A 6% solution of urea is isotonic with