What are X and Y respectively in the following set of reactions? 
1
2
3
4
- In the first reaction, 1-butanol reacts with \(Br_2\) in the presence of red phosphorus to form 1-bromobutane by substitution of the -OH group. So, \(X =\) 1-bromobutane.
- In the second reaction, butanal is first brominated at the alpha-position by \(Br_2\)/red P, forming an alpha-bromo aldehyde intermediate. Subsequent treatment with water leads to the formation of an alpha-bromo hydroxy compound, i.e., 3-bromo-1-hydroxybutanone.
So, \(Y =\) 3-bromo-1-hydroxybutanone.
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 two reactions A and B: 
The numerical value of [molar mass of $x$ + molar mass of $y$] is ___.
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.}