Observe the equation of the chemical reactions given below.
i. NaOH (aq) + HCl (aq) → 2NaCl (aq) + H2O(l)
ii. N2(g) + O2 (g) ⇌ 2NO(g)
iii. Zn(s) + ZHCl → ZnCl2 (ql) + H2(g)
iv. 2SO2 (g) + O2(g) ⇌ 2SO3 (g)
a In which chemical reaction pressure can influence its speed ?
b. In this reaction what changes will be made in pressure for increasing forward reaction ? Why ?