AIPMT 2011 Preliminary Mock Test

The value of $\Delta H$ for the reaction ${\text{X}}_{2(\text{g})}+4{\text{Y}}_{2(\text{g})}\rightleftharpoons 2{\text{XY}}_{4(\text{g})}$ is less than zero. Formation of ${\text{XY}}_{4(\text{g})}$ will be favoured at:

Of the following which one is classified as a polyester polymer?

What is the product obtained in the following reaction: $\text{Nitrobenzene}\stackrel{{\text{Zn/NH}}_4\text{Cl}}{\to }\dots$?

In a set of reactions $m$ -bromobenzoic acid gave a product $D$. Identify the product $D$.

In Dumas' method of estimation of nitrogen $0.35\text{g}$ of an organic compound gave $55\text{mL}$ of nitrogen collected at $300\text{K}$ temperature and $715\text{mm}$ pressure. The percentage composition of nitrogen in the compound would be: (Aqueous tension at $300\text{K}=15\text{mm}$)