Question Bank Directory

For a given exothermic reaction, $K_p$ and $K'_p$ are the equilibrium constants at temperatures $T_1$ and $T_2$ respectively. Assuming that heat of reaction is constant in a temperature range between $T_1$ and $T_2$, it is readily observed that (assuming $T_2 > T_1$):

Two half cell reactions are given below: $Co^{3+} + e^- \rightarrow Co^{2+} \ ; \ E^{\circ}_{Co^{2+}/Co^{3+}} = -1.81\text{ V}$ $2Al^{3+} + 6e^- \rightarrow 2Al(s) \ ; \ E^{\circ}_{Al/Al^{3+}} = +1.66\text{ V}$ The standard EMF of a cell with feasible redox reaction will be:

Consider the reactions: (i) $(\text{CH}_3)_2\text{CHCH}_2\text{Br} \xrightarrow{\text{C}_2\text{H}_5\text{OH}} (\text{CH}_3)_2\text{CHCH}_2\text{OC}_2\text{H}_5 + \text{HBr}$ (ii) $(\text{CH}_3)_2\text{CHCH}_2\text{Br} \xrightarrow{\text{C}_2\text{H}_5\text{O}^-} (\text{CH}_3)_2\text{CHCH}_2\text{OC}_2\text{H}_5 + \text{Br}^-$ The mechanisms of reactions (i) and (ii) are, respectively:

Among the following, which hydrolysis reaction occurs at the slowest rate:

The correct Boolean operation represented by the circuit diagram drawn is :

Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the $H^+$ ion concentration in the mixture?

At infinite dilution, equivalent conductances of $Ba^{2+}$ & $Cl^-$ ions are $127$ & $76 \text{ ohm}^{-1}\text{cm}^{-1}\text{ eq}^{-1}$ respectively. Equivalent conductance ($\text{ohm}^{-1}\text{cm}^{-1}\text{ eq}^{-1}$) of $BaCl_2$ at infinite dilution is:

The 2-chlorobutane obtained by chlorination of n-butane will be:

For any reversible reaction, if we increase the concentration of the reactants, the equilibrium constant will:

The salt solution that is basic in nature is:

Mark the conditions that favour the maximum product formation in the given reaction: $A_2(g) + B_2(g) \rightleftharpoons X_2(g), \Delta_r H = -X \text{ kJ}$

Which of the following is a free radical substitution reaction?

If $0.01\text{ M}$ acetic acid solution is $1\%$ ionised, then pH of this acetic acid solution is:

An organic compound A ($\text{C}_4\text{H}_9\text{Cl}$) in reaction with $\text{Na}$/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. A is:

For a weak acid $\text{HA}$, the percentage of dissociation is nearly $1\%$ at equilibrium. If the concentration of acid is $0.1\text{ mol L}^{-1}$, then the correct option for its $K_a$ at the same temperature will be:

The end product in the below-mentioned reaction is: $\text{H}_3\text{C-Br} \xrightarrow{\text{KCN}} \text{A} \xrightarrow{\text{H}_3\text{O}^+} \text{B} \xrightarrow{\text{LiAlH}_4\text{, Ether}} \text{C}$

The reagent that can be used to distinguish between 1-butyne and 2-butyne is:

Compound 'A' on chlorination gives compound 'B'. 'B' reacts with alc. KOH to give gas 'C' which decolorizes Baeyer reagent. Ozonolysis of compound 'C' gives only HCHO compound. Compound 'A' is:

Select the correct match

Match Column-I with Column-II. Columns I and II represent complexes and magnetic moment (BM) respectively. **Column-I** (a) $[Fe(CN)_6]^{3-}$ (b) $[Fe(H_2O)_6]^{3+}$ (c) $[Fe(CN)_6]^{4-}$ (d) $[Fe(H_2O)_6]^{2+}$ **Column-II** (i) 5.92 BM (ii) 0 BM (iii) 4.90 BM (iv) 1.73 BM