Question Bank Directory

Consider the reaction $N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)$. The equality relationship between $\frac{d[NH_3]}{dt}$ and $-\frac{d[H_2]}{dt}$ is:

Which of the following compounds has the lowest melting point?

In which of the following molecules, all atoms are coplanar?

In the given reaction the product P is:

For a chemical reaction, $4A + 3B \rightarrow 6C + 9D$ rate of formation of C is $6 \times 10^{–2} \text{ mol L}^{–1} \text{ s}^{–1}$ and rate of disappearance of A is $4 \times 10^{–2} \text{ mol L}^{–1} \text{ s}^{–1}$. The rate of reaction and amount of B consumed in interval of 10 seconds, respectively will be:

Which of the following compounds has a higher hydration energy than the lattice energy?

The correct order of dipole moments for molecules NH$$_3$$, H$$_2$$S, CH$$_4$$ and HF is:

The half-life period of a first-order reaction is 1386 s. The specific rate constant of the reaction is:

The ratio of radius of gyration of a solid sphere of mass $M$ and radius $R$ about its own axis to the radius of gyration of the thin hollow sphere of same mass and radius about its axis is

$^{235}_{92}U$ nucleus absorbs a neutron and disintegrates into $^{139}_{54}Xe$, $^{94}_{38}Sr$ and $x$. The product $x$ is:

In the reaction, $\text{BrO}_3^-(aq) + 5\text{Br}^-(aq) + 6\text{H}^+(aq) \rightarrow 3\text{Br}_2(l) + 2\text{H}_2\text{O}(l)$ The rate of appearance of bromine ($\text{Br}_2$) is related to rate of disappearance of bromide ions as following:

The half-life for a zero-order reaction having 0.02 M initial concentration of reactant is 100 s. The rate constant (in mol L⁻¹ s⁻¹) for the reaction is:

The $\text{-OH}$ group of an alcohol or the carboxylic acid can be replaced by $\text{-Cl}$ using:

A reaction having equal energies of activation for forward and reverse reaction has:

In the silver plating of copper, $K[Ag(CN)_2]$ is used instead of $AgNO_3$. The reason is:

Consider the following reaction: $\text{A}_2(g) + \text{B}_2(g) \rightleftharpoons 2\text{AB}(g)$. At equilibrium, the concentrations of $[\text{A}_2] = 3.0 \times 10^{–3} \text{ M}$; $[\text{B}_2] = 4.2 \times 10^{–3} \text{ M}$ and $[\text{AB}] = 2.8 \times 10^{–3} \text{ M}$. The value of $K_c$ for the above-given reaction in a sealed container at $527^\circ\text{C}$ is:

Amongst the given options, which of the following molecules/ions acts as a Lewis acid?

$\text{CH}_3\text{CH}_2\text{CHCl}_2$ upon reaction with $\text{NaNH}_2$ gives:

Boric acid is an acid because its molecule

A pair among the following that have the same size is: