JEE Main 2016 — Physical Chemistry

An aqueous solution of a salt $M{X}_{2}$ at certain temperature has a Van't Hoff factor of $2$. What is the degree of dissociation for this solution of the salt?

An organic compound contains $C,H$ and $S$. The minimum molecular weight of the compound containing $8%$ Sulphur is

Aqueous solution of which of the following salts will not contain ions with the electronic configuration $1{s}^{2}2{s}^{2}2{p}^{6}3{s}^{2}3{p}^{6}$ ?

At $300K$ and $1\mathrm{atm}$, $15\mathrm{mL}$ of a gaseous hydrocarbon requires $375\mathrm{mL}$ air containing $20%{O}_{2}$ by volume, for complete combustion. After combustion, the gases occupy $345\mathrm{mL}$. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is: (Assume complete combustion of reactant)

Decomposition of ${H}_{2}{O}_{2}$ follows a first order reaction. In fifty minutes the concentration of ${\text{H}}_{2} {\text{O}}_{2}$ decreases from $0.5$ to $0.125 M$ in one such decomposition. When the concentration of ${H}_{2}{O}_{2}$ reaches $0.05 M$ , the rate of formation of ${O}_{2}$ will be:

For the reaction, $A(g)+B(g)\rightarrow C(g)+D(g), \Delta {H}^{o}$ and $\Delta {S}^{o}$ are, respectively, $-29.8 kJ mo{l}^{-1}$ and $-0.100 kJ {K}^{-1} mo{l}^{-1}$ at 298 K. The equilibrium constant for the reaction at 298 k is:

Galvanization is applying a coating of:

$18g$ glucose $({C}_{6}{H}_{12}{O}_{6})$ is added to $178.2g$ water. The vapour pressure of water (in torr) for this aqueous solution is:

Identify the correct statement:

If$100\mathrm{mole}$ of ${H}_{2}{O}_{2}$ decompose at $1\mathrm{bar}$ and $300K$, the work is done ($\mathrm{kJ}$) by one mole of ${O}_{2}(g)$ as it expands against $1\mathrm{bar}$ pressure is: $2{H}_{2}{O}_{2}(l)\rightleftharpoons 2{H}_{2}O(l)+{O}_{2}(g)$ $(R=8.3 J {K}^{-1} {\mathrm{mol}}^{-1})$

Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing $0.2$ Faraday electricity through an aqueous solution of potassium succinate, what is the total volume of gases (at both cathode and anode) at STP ($1\mathrm{atm}$ and $273K$)?

The amount of arsenic pentasulphide that can be obtained when $35.5g$ arsenic acid is treated with excess ${H}_{2}S$ in the presence of conc. $\mathrm{HCl}$ (assuming $100%$ conversion) is

The equilibrium constant at $298K$ for a reaction $A+B\rightleftharpoons C+D$ is $100$. If the initial concentration of all the four species were$1M$ each, then the equilibrium concentration of $D$ (in mol ${L}^{-1}$) will be:

The heats of combustion of carbon and carbon monoxide are $-393.5 and-283.5 kJ mo{l}^{-1},$ respectively. The heat of formation $(\mathrm{in}\mathrm{kJ})$ of carbon monoxide per mole is:

The rate law for the reaction below is given by the expression $k[A][B]$ $A+B\rightarrow Product$ If the concentration of $B$ is increased from $0.1\mathrm{to}0.3\mathrm{mol}$, keeping the value of $A$ at $0.1\mathrm{mol}$, the rate constant will be:

The reaction of ozone with oxygen atoms in the presence of chlorine atoms can occur by a two step process shown below: ${O}_{3}(g)+{\mathrm{Cl}}^{•}\rightarrow {O}_{2}(g)+{\mathrm{ClO}}^{•}(g)$ ...(i) ${k}_{i}=5.2\times {10}^{9} L mo{l}^{-1} {s}^{-1}$ ${\mathrm{ClO}}^{•}(g)+{O}^{•}(g)\rightarrow {O}_{2}(g)+{\mathrm{Cl}}^{•}(g)$ ...(ii) ${k}_{ii}=2.6\times {10}^{10} L mo{l}^{-1} {s}^{-1}$ The closest rate constant for the overall reaction ${O}_{3}(g)+{O}^{•}(g)\rightarrow 2{O}_{2}(g)$ is:

The solubility of ${N}_{2}$ in water at $\text{300} \text{K}$ and $\text{500} \text{torr}$ partial pressure is $0.01g{L}^{-1}.$ The solubility (in ${ \text{g L}}^{ -\text{1}}$ ) at $\text{750} \text{torr}$ partial pressure is:

The total number of orbitals associated with the principal quantum number $5$ is:

The volume of 0.1 M strong dibasic acid sufficient to neutralize 1g of a base that furnishes 0.04 mole of $O{H}^{-}$ in aqueous solution is :

What will happen when a block of copper metal is dropped into a beaker containing a solution of $1 \text{M}$ $ZnS{O}_{4}$?