AIEEE 2007 PYQ Mock Test

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, ${\text{K}}^{+},{\text{Ca}}^{2+},{\text{Mg}}^{2+},{\text{Be}}^{2+}$?

The density (in ${\text{g mL}}^{-1}$) of a $3.60\text{M}$ sulphuric acid solution that is $29\%{\text{H}}_2{\text{SO}}_4$ (Molar mass $=98{\text{g mol}}^{-1}$) by mass will be:

The first and second dissociation constants of an acid ${\text{H}}_2\text{A}$ are $1.0\times 10^{-5}$ and $5.0\times 10^{-10}$ respectively. The overall dissociation constant of the acid will be:

A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of $290\text{mm}$ at $300\text{K}$. The vapour pressure of pure propyl alcohol is $200\text{mm}$. If the mole fraction of ethyl alcohol is $0.6$, its vapour pressure in pure state at the same temperature will be:

In conversion of limestone to lime, ${\text{CaCO}}_3(s)\to \text{CaO}(s)+{\text{CO}}_2(g)$, the values of $\Delta H^0$ and $\Delta S^0$ are $+179.1{\text{kJ mol}}^{-1}$ and $160.2\text{J/K}$ respectively at $298\text{K}$. Above which temperature will the reaction become spontaneous?