Reactions will be affected in those in which ($n_p$ ≠ $n_r$)gaseous. Hence, reactions (i), (iii), (iv), (v) and (vi) will be affected. By applying Le Chatelier’s principle, we can predict the direction. (i) $n_p$ = 2, $n_r$ = 1 i.e., $n_p$ > $n_r$, reaction will go in the backward direction. (ii) $n_p$ = 3, $n_r$ = 3 i.e., $n_p$ = $n_r$, reaction will not be affected by pressure. (iii) $n_p$ = 2, $n_r$ = 1 i.e., $n_p$ > $n_r$, reaction will go in the backward direction. (iv) $n_p$ = 1, $n_r$ = 3 i.e., $n_p$ < $n_r$, reaction will go in the forward direction. (v) $n_p$ = 1, $n_r$ = 0 i.e., $n_p$ > $n_r$, reaction will go in the backward direction. (vi) $n_p$ = 10, $n_r$ = 9 i.e., $n_p$ > $n_r$, reaction will go in the backward direction.