Identify the coordination number of aluminium in potassium trioxalatoaluminate(III).
Which of the following isomeric amines has the highest boiling point?
If $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}$ are four different elements with outer electronic configuration as $\mathrm{A}=4 \mathrm{~s}^2 4 \mathrm{p}^4, \mathrm{~B}=4 \mathrm{~s}^2 4 \mathrm{p}^5, \mathrm{C}=5 \mathrm{~s}^2 5 \mathrm{p}^4, \mathrm{D}=5 \mathrm{~s}^2 5 \mathrm{p}^5$.
Find the element having highest ionization enthalpy $\left(\Delta_1 \mathrm{H}_1\right)$
What is the change in internal energy for $2 \mathrm{CO}_{(\mathrm{g})}+\mathrm{O}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{CO}_{2(\mathrm{~g})}$ at $25^{\circ} \mathrm{C}$ ?
( $\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}, \Delta \mathrm{H}=-560 \mathrm{~kJ}$ )