Consider the following standard electrode potentials ( \(\mathrm{E}^0\) in volts) in aqueous solution

Based on this data, which of the following statements is correct?

Which among the following statements is/are incorrect regarding real gases?
(i) Their compressibility factor is never equal to unity $(Z\ne 1)$.
(ii) The deviations from ideal behavior are less at low pressures and high temperatures.
(iii) Intermolecular forces among gas molecules are equal to zero.
(iv) The obey Van der Waals equation, $\mathrm{PV}=\mathrm{nRT}$.

Which of the following orders is not correct against the given property

Calculate the energy required to convert all atoms in \(4.8 \mathrm{~g}\) of \(\mathrm{Mg}\) to \(\mathrm{Mg}^{2+}\) in the vapour state. \(\mathrm{IE}_1\) and \(\mathrm{IE}_2\) of \(\mathrm{Mg}\) are \(740 \mathrm{~kJ} / \mathrm{mol}\) and \(1450 \mathrm{~kJ} / \mathrm{mol}\) respectively.

The number of aldehydes that undergo cannizaro reaction from the following are Phenyl ethanal, Methanal, 2 Methoxy propanal, Trichoro ethanal

Assertion (A) : Blood cells collapse when suspended in saline water Reason (R): Cell membrane dissolves in saline water

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?

For a material, the ratio of Young's modulus to rigidity modulus is 2.8 . If some force is applied on a wire made of this material, its cross-sectional area decreases by \(2 \%\). The percentage change in its length is

Consider the following:
Statement-I : In the extraction of Al by Hall-Heroult process, pure \(\mathrm{Al}_2 \mathrm{O}_3\) mixed with \(\mathrm{Na}_3 \mathrm{~AlF}_6\) lowers its melting point and increases conductivity.
Statement-II : Zirconium metal is purified by zone refining method.
The correct answer is

The radius of curvature of the face of planoconvex lens is \(12 \mathrm{~cm}\) and its refractive index is 1.5. Then, the focal length of the lens is

The correct statement of the following is

Acceleration of a body whose displacement follows the equation \(3 s=9 t+5 t^2\) is in \(\mathrm{ms}^{-2}\)

At the moment \(\mathrm{t}=0\), a time dependent force \(\mathrm{F}=\) at (where a is constant equal to \(1 \mathrm{Ns}^{-1}\) ) is applied to a body of mass \(1 \mathrm{~kg}\) resting on a smooth horizontal plane as shown in the figure. If the direction of this force makes an angle \(45^{\circ}\) with the horizontal, then the velocity of the body at the moment it leaves the plane is
(acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-2}\) )