Choose the incorrect statement.

The initial pressure of the system before decomposition for a first order gas phase reaction \(A_{(g)} \rightarrow B_{(g)} + C_{(g)}\) was \(P_i\). After lapse of time 't', total pressure of the system increased by 'x' units and became \(P_t\). The rate constant 'k' for the reaction is given as:

Para and ortho hydrogen differ in:

Which of the following 2 compounds exhibit both Geometrical and Structural isomerism?
\(\begin{aligned}
& \mathrm{A}=\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{NO}_2 \\
& \mathrm{~B}=\left[\mathrm{Co}\left(\mathrm{NH}_3\right) \mathrm{Br}\right] \mathrm{SO}_4 \\
& \mathrm{C}=\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right] \\
& \mathrm{D}=\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3
\end{aligned}\)

Match the coordination compounds in Column I having the given type of hybridisation of \(\mathrm{M}^{\mathrm{n}+}\) ion and magnetic moment as given in Column II.
\(\begin{array}{|l|l|l|l|} \hline & \text { Coordination compounds. } & & \text { Hybridisation \& Magnetic nature. } \\ \hline \text { A } & \mathrm{Ni}(\mathrm{CO})_4 & \text { P } & \mathrm{sp}^3, \quad \mu=5.92 \mathrm{BM} \\ \hline \text { B } & {\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}} & \text { Q } & \mathrm{sp}^3, \quad \mu=2.84 \mathrm{BM} \\ \hline \text { C } & {\left[\mathrm{Ni}(\mathrm{Cl})_4\right]^{2-}} & \text { R } & \mathrm{sp}^3, \quad \mu=0 \\ \hline \text { D } & {[\mathrm{MnBr}]^{2-}} & \text { S } & \mathrm{dsp}^2, \quad \mu=0 \\ \hline \end{array}\)

When \(\mathrm{KBr}\) is dissolved in water, \(\mathrm{K}^{+}\)ions are

Total number of \(\sigma\) and \(\pi\) bonds in ethene molecule is

Which of the following compound cannot be prepared by Williamson's synthesis?

Which one of the following is a second order reaction?

The shortest wavelengths of Paschen, Balmer and Lyman series are in the ratio

A square loop of wire 2.2 cm on each side contains 2 turns and has a total resistance of \(0.0002\ \Omega\). It is located 22 cm from a long straight current carrying wire. If the current in the straight wire is increased at a steady rate from 20 A to 50 A in 5 s, determine the magnitude of the current induced in the squared loop.

5.0 moles of an Ideal gas at 3.0 atm pressure and \(27^{\circ} \mathrm{C}\) is compressed isothermally to half its volume by application of an external pressure of \(3.5 \mathrm{~atm}\). What is the amount of work done (in joules) on the gas?
Given: \(1 \mathrm{~L} \mathrm{~atm}=101.3 \mathrm{~J}: \mathrm{R}=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~K}{ }^{-1} \mathrm{~mol}^{-1}\)

For a reaction, \(2 A+B \longrightarrow\) products,
If concentration of \(B\) is kept constant and concentration of \(A\) is doubled then rate of reaction is