Define the following terms:
(i) Colligative properties
(ii) Molality (m)
(i) Colligative properties
(ii) Molality (m)
(i) Properties that are independent of nature of solute and depend on number of moles of solute only.
(ii) Number of moles of solute dissolved per kg of the solvent.
(ii) Number of moles of solute dissolved per kg of the solvent.
The partial pressure of ethane over a saturated solution containing 6.56 × 10⁻² g of ethane is 1 bar. If the solution were to contain 5.0 × 10⁻² g of ethane, then what will be the partial pressure of the gas ?
What is meant by rate of a reaction ? Differentiate between average rate and instantaneous rate of a reaction.
Explain why on addition of 1 mol of NaCl to 1 litre of water, the boiling point of water increases, while addition of 1 mol of methyl alcohol to one litre of water decreases its boiling point.
(i) Gas (A) is more soluble in water than Gas (B) at the same temperature. Which one of the two gases will have the higher value of KH (Henry’s constant) and why ?
(ii) In non-ideal solution, what type of deviation shows the formation of maximum boiling azeotropes ?
Define the following terms:
(i) Abnormal molar mass
(ii) van’t Hoff factor