Neet PYQ 2007

Calculate the $\text{pOH}$ of a solution at $25{}^{\circ }\text{C}$ that contains $1\times 10^{-10}\text{ M}$ of hydronium ions.

Which of the following will give a pair of enantiomorphs? ($\text{en}={\text{NH}}_2{\text{CH}}_2{\text{CH}}_2{\text{NH}}_2$)

The correct order of increasing thermal stability of ${\text{K}}_2{\text{CO}}_3$, ${\text{MgCO}}_3$, ${\text{CaCO}}_3$ and ${\text{BeCO}}_3$ is:

A weak acid, $\text{HA}$, has a $K_a$ of $1.00\times 10^{-5}$. If $0.100\text{ mole}$ of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to:

The number of moles of ${\text{KMnO}}_4$ that will be needed to react with one mole of sulphite ion in acidic solution is: