Identify correct statements :
(A) Primary amines do not give diazonium salts when treated with \(\mathrm{NaNO}_2\) in acidic condition.
(B) Aliphatic and aromatic primary amines on heating with \(\mathrm{CHCl}_3\) and ethanolic KOH form carbylamines.
(C) Secondary and tertiary amines also give carbylamine test.
(D) Benzenesulfonyl chloride is known as Hinsberg's reagent.
(E) Tertiary amines reacts with benzenesulfonyl chloride very easily.

Choose the correct answer from the options given below :

Borazine, also known as inorganic benzene, can be prepared by the reaction of \(3-equivalents\) of " \(X\) " with \(6-equivalents\) of "\(Y\)"."\(X\)" and "\(Y\)", respectively are.

The bond angle \(H-X-H\) is the greatest in the compound

Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be \(......\)

An element ' \(E^{\prime}\) has the ionisation enthalpy value of \(374 \mathrm{~kJ} \mathrm{~mol}^{-1}\). ' \(E\) ' reacts with elements \(\mathrm{A}, \mathrm{B}, \mathrm{C}\) and D with electron gain enthalpy values of \(-328,-349,-325\) and \(-295 \mathrm{~kJ} \mathrm{~mol}^{-1}\), respectively. The correct order of the products EA, EB, EC and ED in terms of ionic character is :

Consider the following reactions : \((i)\) Glucose \(+ ROH \quad \stackrel{\text { dry } HCl }{\longrightarrow}\) Acetal \(\xrightarrow[{{{\left( {C{H_3}CO} \right)}_2}O}]{{x\,eq.of}}\) acetyl derivative \((ii)\) Glucose \(\xrightarrow{{Ni/{H_2}}}A\xrightarrow[{{{\left( {C{H_3}CO} \right)}_2}O}]{{y\,\,eq.\,of}}\) acetyl derivative. \((iii)\) Glucose \(\xrightarrow[{{{\left( {C{H_3}CO} \right)}_2}O}]{{z\,ed.\,of}}\) acetyl derivative. \(' x ^{\prime},{ }^{\prime} y ^{\prime}\) and \({ }^{\prime} z^{\prime}\) in these reactions are respectively.

When \(XO_2\)  is fused with an alkali metal hydroxide in presence of an oxidizing agent such as \(KNO_3,\) a dark green product is formed which disproportionates in acidic solution to afford a dark purple solution. \(X\)  is

A long, straight wire of radius \(a\) carries a current distributed uniformly over its cross-section. The ratio of the magnetic fields due to the wire at distance \(\frac{a}{3}\) and \(2 a,\) respectively from the axis of the wire is

Combustion of \(1\) mole of benzene is expressed at \(\mathrm{C}_6 \mathrm{H}_6(1)+\frac{15}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})+3 \mathrm{H}_2 \mathrm{O}(1) \text {. }\) The standard enthalpy of combustion of \(2 \mathrm{~mol}\) of benzene is - ' \(x\) ' \(k J\). \(\mathrm{x}=\) _______ \((1)\) standard Enthalpy of formation of \(1 \mathrm{~mol}\) of \(\mathrm{C}_6 \mathrm{H}_6(1)\), for the reaction \(6 \mathrm{C}\) (graphite) \(+3 \mathrm{H}_2(\mathrm{~g}) \rightarrow \mathrm{C}_6 \mathrm{H}_n(1)\) is \(48.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\). \((2)\) Standard Enthalpy of formation of \(1 \mathrm{~mol}\) of \(\mathrm{CO}_2(\mathrm{~g})\), for the reaction \(\mathrm{C}\) (graphite) \(+\mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{CO}_2(\mathrm{~g})\) is \(-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\). \((3)\) Standard and Enthalpy of formation of \(1 \mathrm{~mol}\) of \(\mathrm{H}_2 \mathrm{O}(1)\), for the reaction \(\mathrm{H}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{H}_2 \mathrm{O}(1)\) is \(-286 \mathrm{~kJ} \mathrm{~mol}^{-1}\).

An electron rotates in a circle around a nucleus having positive charge \(\mathrm{Ze}\). Correct relation between total energy ( \(E\) ) of electron to its potential energy \((U)\) is _______.

Which of the following will have maximum stabilization due to crystal field?

Let \(A_1\) and \(A_2\) be two arithmetic means and \(G_1, G_2\), \(G _3\) be three geometric means of two distinct positive numbers. The \(G _1^4+ G _2^4+ G _3^4+ G _1^2 G _3^2\) is equal to

If \(0\,<\,x\,<\,1\), then \(\frac{3}{2} x^{2}+\frac{5}{3} x^{3}+\frac{7}{4} x^{4}+\ldots . .\), is equal to :