| List I | List II | ||
| A | Nitrogen oxides in air | I | Eutrophication |
| B | Nitrogen oxides in air | II | Eutrophication |
| C | Carbon dioxide | III | Global warming |
| D | Phosphate fertilisers in water | IV | Acid rain |
Choose the correct answer from the options given below:
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.
