To solve this problem, we need to understand how the boiling point of solutions is affected by their concentration and the nature of the solute. The boiling point elevation is a colligative property, which means it depends on the number of solute particles in a solution. The formula for boiling point elevation is:
ΔTb=iKbm
Where:
Let's analyze each solution:
Order these solutions by their boiling point elevation. Higher the product of i and concentration, higher the boiling point:
Solution | i | Concentration | i×Concentration |
---|---|---|---|
(i) 10-4 M NaCl | 2 | 10-4 | 2×10-4 |
(ii) 10-4 M Urea | 1 | 10-4 | 1×10-4 |
(iii) 10-3 M NaCl | 2 | 10-3 | 2×10-3 |
(iv) 10-2 M NaCl | 2 | 10-2 | 2×10-2 |
Resulting order of increasing boiling points:
(ii) < (i) < (iii) < (iv)
Given below are two statements:
Statement (I): Molal depression constant $ k_f $ is given by $ \frac{M_1 R T_f}{\Delta S_{\text{fus}}} $, where symbols have their usual meaning.
Statement (II): $ k_f $ for benzene is less than the $ k_f $ for water.
In light of the above statements, choose the most appropriate answer from the options given below:
Resonance in X$_2$Y can be represented as
The enthalpy of formation of X$_2$Y is 80 kJ mol$^{-1}$, and the magnitude of resonance energy of X$_2$Y is: