What are X and Y in the following reaction?
\(\mathrm{nClCH}=\mathrm{CH}_2 \xrightarrow{\mathrm{X}} \mathrm{Y}\)

For the reaction, \(\mathrm{N}_2 \mathrm{O}_4(g) \rightleftharpoons 2 \mathrm{NO}_2(g)\), if dinitrogen tetroxide is \(50 \%\) dissociated at \(60^{\circ} \mathrm{C}\), the standard free energy change at this temperature and \(1 \mathrm{~atm}\) pressure is

Identify the initiation step \(/ \mathrm{s}(\mathrm{X})\) and termination \(\mathrm{step} / \mathrm{s}(\mathrm{Y})\) of free radical chlorination of \(\mathrm{CH}_4\) from the following.
a) \(\dot{\mathrm{C}}_3+\dot{\mathrm{C}} \mathrm{l} \rightarrow \mathrm{CH}_3-\mathrm{Cl}\)
b) \(\dot{\mathrm{Cl}}+\dot{\mathrm{C}} l \rightarrow \mathrm{Cl}-\mathrm{Cl}\)
c) \(\dot{\mathrm{C}}_3+\mathrm{Cl}_2 \rightarrow \mathrm{CH}_3-\mathrm{Cl}+\dot{\mathrm{Cl}}\)
d) \(\mathrm{Cl}_2 \rightarrow 2 \dot{\mathrm{Cl}}\)
e) \(\mathrm{CH}_4+\dot{\mathrm{Cl}} \rightarrow \dot{\mathrm{C}} \mathrm{H}_3+\mathrm{HCl}\)
f) \(\mathrm{CH}_3+\dot{\mathrm{C}}_3 \rightarrow \mathrm{CH}_3-\mathrm{CH}_3\)

Methane of the polluted air reacts with ozone and forms the compounds.

Which one of the following molecules contain both ionic and covalent bonds?

Which one of the following elements on doping with germanium, make it a p-type semiconductor?

Which of the following statements is not correct?

The following equation is obtained for a first order reaction at 300 K .
\(\log _{10} \frac{\mathrm{k}}{\mathrm{~A}}=0.00174\)
What is the activation energy (in \(\mathrm{J} \mathrm{mol}^{-1}\) ) of the reaction?
\(\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right)\)

If the time period of revolution of a satellite is \(T\). then its kinetic energy is proportional to

A short bar magnet produces a magnetic field of \(6.4 \times 10^{-5} \mathrm{~T}\) at a distance of \(20 \mathrm{~cm}\) from the centre of the magnet on the normal bisector of the magnet. The magnetic field produced by this magnet at a distance of \(40 \mathrm{~cm}\) from the centre of the magnet on the axis, is

If \(\mathbf{a}=\hat{\mathbf{i}}+\hat{\mathbf{j}}+\hat{\mathbf{k}}, \mathbf{b}=\hat{\mathbf{i}}+\hat{\mathbf{j}}+2 \hat{\mathbf{k}}\) and \(\mathbf{c}=2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}+4 \hat{\mathbf{k}}\) then the magnitude of the projection on \(\mathbf{c}\) of a unit vector that is perpendicular to both \(\mathbf{a}\) and \(\mathbf{b}\) is

The inverse of the matrix \(\left[\begin{array}{ccc}7 & -3 & -3 \\ -1 & 1 & 0 \\ -1 & 0 & 1\end{array}\right]\) is

The equation of a circle which touches the $x$-axis and whose centre is $\left(1,2\right)$ is