A weak acid with \(\mathrm{p} K_a 5.9\) and weak base with \(\mathrm{p} K_b 5.8\) are mixed in equal proportions. \(\mathrm{pH}\) of the resulting solution is

In a transition series, with increase in atomic-number, the paramagnetism

Homoleptic complexes among the following are
(A) \(\mathrm{K}_3\left[\mathrm{Al}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]\)

(B) \(\left[\mathrm{CoCl}_2(\mathrm{en})_2\right]^{+}\)

(C) \(\mathrm{K}_2\left[\mathrm{Zn}(\mathrm{OH})_4\right]\)

Match List-I with List-II
\begin{array}{|l|l|l|l|}\hline & \text{List-I (Types of redox reactions)} & & \text{List-II (Examples)} \\\hline \text{a}. & \text{Combination reaction} & \text{(i)} & \mathrm{Cl}_{2(\mathrm{~g})}+2 \mathrm{Br}_{(\mathrm{aq})}^{-} \rightarrow 2 \mathrm{Cl}_{(\mathrm{aq})}^{-}+\mathrm{Br}_{2(\mathrm{l})} \\\hline \text{b.} & \text{Decomposition reaction} & \text{(ii)} & 2 \mathrm{H}_2 \mathrm{O}_{2(\mathrm{aq})} \rightarrow 2 \mathrm{H}_2 \mathrm{O}_{(1)}+\mathrm{O}_{2(\mathrm{~g})} \\\hline \text{c.} & \text{Displacement reaction} & \text{(iii)} & \mathrm{CH}_{4(\mathrm{~g})}+2 \mathrm{O}_{2(\mathrm{~g})} \xrightarrow{\Delta} \mathrm{CO}_{2(\mathrm{~g})}+2 \mathrm{H}_2 \mathrm{O}_{(1)} \\\hline \text{d.} & \text{Disproportionation reaction} & \text{(iv)} & \mathrm{H}_2 \mathrm{O}_{(1)} \xrightarrow{\Delta} 2 \mathrm{H}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} \\\hline\end{array}

Choose the correct answer from the options given below.

Carboxylic acids are more acidic than phenols because

Which one of the following nitrate will decompose to give \(\mathrm{NO}_2\) on heating ?

An oxygen containing organic compound was found to contain \(52 \%\) carbon and \(13 \%\) of hydrogen. Its vapour density is 23 . The compound reacts with sodium metal to liberate hydrogen. A functional isomer of this compound is

A group \((G, *)\) has 10 elements. The minimum number of elements of \(G\), which are their own inverses is

Elution means

The pressure at the bottom of a liquid tank is not proportional to the

The \(\mathrm{C}-\mathrm{H}\) bond and \(\mathrm{C}-\mathrm{C}\) bond in ethane are formed by which of the following types of overlap?

5 moles of \(\mathrm{SO}_{2}\) and 5 moles of \(\mathrm{O}_{2}\) are allowed to react. At equilibrium, it was found that \(60 \%\) of \(\mathrm{SO}_{2}\) is used up. If the partial pressure of the equilibrium mixture is one atmosphere, the partial pressure of \(\mathrm{O}_{2}\) is

Which of the following is an incorrect statement?