Consider the following two reactions A and B: 
The numerical value of [molar mass of $x$ + molar mass of $y$] is ___.
Which one of the following graphs accurately represents the plot of partial pressure of CS₂ vs its mole fraction in a mixture of acetone and CS₂ at constant temperature?

Consider the following reaction sequence: 
Given: Compound (x) has percentage composition \(76.6%\ \text{C}\), \(6.38%\ \text{H}\) and vapour density \(=47\). Compound (y) develops a characteristic colour with neutral \(\mathrm{FeCl_3}\) solution. Identify the {INCORRECT statement.}
Standard electrode potentials of Na, Ni, and Cl are given. Which one has the highest reducing power?
$\text{Cl}_{2}(g) + 2e^- \&\rightarrow 2\text{Cl}^- $
$\text{Ni}^{2+} + 2e^- \&\rightarrow \text{Ni}(s) $
$\text{Na}^+ + e^- \&\rightarrow \text{Na}(s) $