AIPMT 2009 Preliminary Mock Test

From the following bond energies: $\text{H-H}:431.37\text{kJ/mol}$ $\text{C=C}:606.10\text{kJ/mol}$ $\text{C-C}:336.49\text{kJ/mol}$ $\text{C-H}:410.50\text{kJ/mol}$ Enthalpy for the reaction will be:

$10\text{g}$ of hydrogen and $64\text{g}$ of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be:

Among the following which is the strongest oxidising agent?

In which of the following molecules / ions (${\text{BF}}_3,{\text{NO}}_2^{-},{\text{NH}}_2^{-}$ and ${\text{H}}_2\text{O}$), the central atom is $s{p}^2$ hybridized?

Nitrobenzene can be prepared from benzene by using a mixture of conc. ${\text{HNO}}_3$ and conc. ${\text{H}}_2{\text{SO}}_4$. In this mixture, nitric acid acts as a/an: