Problem 1
Which of the following colligative properties can provide molar mass of proteins (or polymers or col loids) with greatest precision? (a) osmotic pressure (b) elevation of boiling point (c) depression of freezing point (d) relative lowing of vapour pressure
Problem 2
The beans are cooked sooner in a pressure cooker, because (a) boiling point increase with increasing pressure (b) boiling point decrease with increasing pressure (c) extra pressure of pressure cooker, softens the beans (d) internal energy is not lost while cooking in pressure cooker.
Problem 3
When a saturated solution of sodium chloride is heated, it (a) becomes remains saturated (b) becomes unsaturated (c) becomes supersaturated (d) achieves equilibrium state
Problem 6
In liquid \(\mathrm{CCl}_{4}\) which of the following has maximum solubility? (a) \(\mathrm{I}_{2}\) (b) \(\mathrm{Br}_{2}\) (c) \(\mathrm{NaCl}\) (d) \(\mathrm{Cl}_{2}^{2}\)
Problem 7
During osmosis, flow of water through a semipermeable membrane is (a) from both sides of semi-permeable membrane with unequal flow rates (b) from solution having lower concentration only (c) from solution having higher concentration only (d) from both sides of semi-permeable membrane with equal flow rates
Problem 9
Which of the following represents a metastable system? (a) an unsaturated solution (b) a dilute solution (c) a saturated solution (d) a supersaturated solution
Problem 10
According to Raoult's law, relative lowering of vapour pressure for a solution is equal to (a) mole fraction of the solute (b) mole fraction of a solvent (c) moles of a solute (d) moles of a solvent
Problem 11
When non-zero volatile solute is dissolved in a solvent, the relative lowering of vapour pressure is equal to (a) molar fraction of solute (b) molar fraction of solvent (c) concentration of the solute in grams per liter (d) concentration of the solute in gram per \(100 \mathrm{~mL}\).
Problem 13
The solubility of a gas in a liquid increases with (a) increase of temperature (b) amount of liquid taken (c) decrease in temperature (d) reduction of gas pressure
Problem 15
Which one of the statements given below concerning properties of solutions, describe a colligative effect? (a) boiling point of pure water decreases by the addition of ethanol (b) vapour pressure of pure water decreases by the addition of nitric acid (c) vapour pressure of pure benzene decreases by the addition of naphthalene (d) boiling point of pure benzene increases by the addition of toluene
