Physical Chemistry PYQ — Page 76

Change in volume of the system does not alter the number of moles in which of the following equilibria ?

Conductivity (unit Siemen’s S) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is

EMF of a cell in terms of reduction potential of its left and right electrodes is

Number of atoms in $558.5$ gram Fe (at.wt. of $\mathrm{Fe}=55.85 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is

For the reaction $A+2 B$ $\rightarrow C$, rate is given by $R=[A][B]^2$ then the order of the reaction is

For the reaction $\mathrm{CO}(\mathrm{g})+(1 / 2) \mathrm{O}_2(\mathrm{~g})=\mathrm{CO}_2(\mathrm{~g}), \mathrm{K}_{\mathrm{p}} / \mathrm{K}_{\mathrm{c}}$ is

Which of the following reaction is possible at anode?

Let the solubility of an aqueous solution of $\mathrm{Mg}(\mathrm{OH})_2$ be $x$ then its $\mathrm{k}_{\text {sp }}$ is

The integrated rate equation is $R t=\log C_0-\log C_t$. The straight line graph is obtained by plotting

1 M NaCl and 1 M HCl are present in an aqueous solution. The solution is

If $\phi$ denotes reduction potential, then which is true ?

A heat engine absorbs heat $Q_1$ at temperature $T_1$ and heat $Q_2$ at temperature $T_2$. Work done by the engine is $J\left(Q_1+Q_2\right)$. This data

How do we differentiate between $\mathrm{Fe}^{3+}$ and $\mathrm{Cr}^{3+}$ in group III?

What will be the emf for the given cell $P \mathrm{t}\left|\mathrm{H}_2\left(\mathrm{P}_1\right)\right| \mathrm{H}^{+}(\mathrm{aq})|| \mathrm{H}_2\left(\mathrm{P}_2\right) \mid \mathrm{Pt}$

The solubility of $\mathrm{Mg}(\mathrm{OH})_2$ is $\mathrm{S}$ moles/litre. The solubility product under the same condition is

In a hydrogen atom, if energy of an electron in ground state is 13.6 eV, then that in the 2nd excited state is

In which of the following reactions, increase in the volume at constant temperature does not affect the number of moles at equilibrium

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are

Species acting as both Bronsted acid and base is

Uncertainity in position of a minute particle of mass $25 \mathrm{~g}$ in space is $10^{-5} \mathrm{~m}$. What is the uncertainity in its velocity (in $\left.\mathrm{ms}^{-1}\right) ?\left(\mathrm{~h}=6.6 \times 10^{-34} \mathrm{Js}\right)$

Which of the following is a redox reaction ?

Freezing point of an aqueous solution is $(-0.186)^{\circ} \mathrm{C}$. Elevation of boiling point of the same solution is $\mathrm{K}_{\mathrm{b}}=0.512^{\circ} \mathrm{C}, \mathrm{K}_{\mathrm{f}}=1.86^{\circ} \mathrm{C}$, find the increase in boiling point.

The differential rate law for the reaction $\mathrm{H}_2+\mathrm{I}_2 \rightarrow 2 \mathrm{HI}$ is

For the reactions, $\mathrm{C}+\mathrm{O}_2 \longrightarrow \mathrm{CO}_2 ; \Delta \mathrm{H}=-393 \mathrm{~J}$ $2 \mathrm{Zn}+\mathrm{O}_2 \longrightarrow 2 \mathrm{ZnO} ; \Delta \mathrm{H}=-412 \mathrm{~J}$