- AMethane
- BAcetylene
- ✓Benzene
- DIsobutane
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$(A)$ Kinetic energy of electron is $\propto \frac{ Z ^{2}}{ n ^{2}}$.
$(B)$ The product of velocity (v) of electron and principal quantum number (n), 'vn' $\propto Z ^{2}$.
$(C)$ Frequency of revolution of electron in an orbit is $\propto \frac{ Z ^{3}}{ n ^{3}}$.
$(D)$ Coulombic force of attraction on the electron is $\propto \frac{ Z ^{3}}{ n ^{4}}$.
Choose the most appropriate answer from the options given below :
| List $-I$ | List $-II$ |
| $A$ $XeF_4$ | $1.$ Pyramidal |
| $B$ $XeF_6$ | $2.$ $T-$ shape |
| $C$ $XeO_3$ | $3.$ Distorted octahedral |
| $D$ $XeOF_2$ | $4.$ Square planar |


$A.$ The electrical work that a reaction can perform at constant pressure and temperature is equal to the reaction Gibbs energy.
$B.$ $E _{\text {cell }}^0$ is dependent on the pressure
$C.$ $\frac{ dE ^0 \text { cell }}{ dT }=\frac{\Delta_{ r } S ^0}{ nF }$
$D.$ A cell is operating reversibly if the cell potential is exactly balanced by an opposing source of potential difference.
