
| List-I (Reagent) | List-II (Products) | ||
| A | ![]() | I | ![]() |
| B | HBF4 \(\triangle\) | II | ![]() |
| C | Cu, HCI | III | ![]() |
| D | CuCN/ KCN | IV | ![]() |
Calculate the potential for half-cell containing 0.01 M K\(_2\)Cr\(_2\)O\(_7\)(aq), 0.01 M Cr\(^{3+}\)(aq), and 1.0 x 10\(^{-4}\) M H\(^+\)(aq).

Wave propagates whose electric field is given by \(\mathbf{E} = 69 \sin(\omega t - kx)\,\hat{j}\). Find the direction of magnetic field.
