JEE Main 2002 — Physical Chemistry

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

With increase of temperature, which of these changes?

In a compound C, H and N atoms are present in 9 : 1 : 35 by weight. Molecular weight of compound is 108. Molecular formula of compound is

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

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

In mixture A and B component show -ve deviation as

If half-life of a substance is 5 yrs, then the total amount of substance left after 15 years, when initial amount is 64 grams is

The heat required to raise the temperature of body by 1 K is called

Units of rate constant of first and zero order reactions in terms of molarity M unit are respectively

If an endothermic reaction is non- spantaneous at freezing point of water and becomes feasible at its boiling point, then