Which of the following reactions proceeds via a secondary free radical?

Thermite is a mixture of \(X\) parts of ferric oxide and \(Y\) parts of aluminium powder. \(X, Y\) respectively are

At \(\mathrm{T}(\mathrm{K})\) when one \(\mathrm{mol}\) of \(\mathrm{X}\) and one mol of \(\mathrm{Y}\) are heated in a \(1 \mathrm{~L}\) flask, 0.5 moles of \(\mathrm{Z}\) is formed at the equilibrium. The \(K_c\) value for the reaction is \(\mathrm{X}(\mathrm{g})+\mathrm{Y}(\mathrm{g}) \rightleftharpoons \mathrm{Z}(\mathrm{g})+\mathrm{A}(\mathrm{g})\)

Observed the following reaction. This reaction represents \(4 \mathrm{HCl}+\mathrm{O}_2 \xrightarrow[723 \mathrm{~K}]{\mathrm{CuCl}_2} 2 \mathrm{Cl}_2+2 \mathrm{H}_2 \mathrm{O}\)

When \(25 \mathrm{~g}\) of a non-volatile solute is dissolved in \(100 \mathrm{~g}\) of water, the vapour pressure is lowered by \(2.25 \times 10^{-1} \mathrm{~mm}\). If the vapour pressure of water at \(20^{\circ} \mathrm{C}\) is \(17.5 \mathrm{~mm}\), what is the molecular weight of the solute?

According to Werner's theory, the number of groups bonded to the central metal atom/ion in a coordination complex represent.

The standard reduction potentials of \(\mathrm{Zn}^{2+}\left|\mathrm{Zn}, \mathrm{Cu}^{2+}\right| \mathrm{Cu}\) and \(\mathrm{Ag}^{+} \mid \mathrm{Cu}\) and \(\mathrm{Ag}^{+} \mid \mathrm{Ag}\) are respectively \(-0.76,0.34\) and \(0.8 \mathrm{~V}\). The following cells were constructed : (1) \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}\right|\left|\mathrm{Cu}^{2+}\right| \mathrm{Cu}\) (2) \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}\right|\left|\mathrm{Ag}^{+}\right| \mathrm{Ag}\) (3) \(\mathrm{Cu}\left|\mathrm{Cu}^{2+} \| \mathrm{Ag}^{+}\right| \mathrm{Ag}\) What is the correct order of \(E_{\text {cell }}^{\circ}\) of these cells?

A steel rod has a radius of \(10 \mathrm{~mm}\) and a length of \(1 \mathrm{~m}\). A \(80 \mathrm{kN}\) force stretches it along its length. If the Young's modulus of the rod is \(2 \times 10^{11} \mathrm{~N} / \mathrm{m}^2\), then the change in length is

The length of a metal wire is found to be \(L_1\) and \(L_2\) when the tension of \(T_1\) and \(T_2\) are applied to it respectively. The natural length of the wire is

Two beams of monochromatic light with intensities $64 \mathrm{mW}$ and $4 \mathrm{mW}$ interfere constructively to produce an intensity of $100 \mathrm{mW}$. If one of the beams is shifted by an angle $\theta ,$ the intensity is reduced to $84 \mathrm{mW}$. The magnitude of $\theta$ is

Young's modulus experiment is performed on a steel wire of \(1 \mathrm{~m}\) length and \(8 \mathrm{~mm}\) diameter. The mass required to be added in the experiment to produce \(5 \mathrm{~mm}\) elongation of the wire is \(\left(Y_{\text {steel }}=2 \times 10^9 \mathrm{Nm}^{-2}, g=10 \mathrm{~m} / \mathrm{s}^2\right)\)

If \(\frac{3 x-2}{(x+1)^2(x+3)}=\frac{A}{x+1}+\frac{B}{(x+1)^2}+\frac{C}{x+3}\), then \(A+B+C=\)

An alpha particle moving with certain speed towards east enters a uniform magnetic field directed vertically up. The alpha particle will then move in