Q.4 (c) In the laboratory preparation of hydrochloric acid, HCl gas is dissolved in water.
i) Draw a diagram to show the arrangement used for the absorption of HCl in water.
structure
ii) why is such an arrangement necessary ? give two reasons.
iii) write the chemical equations for the laboratory preparation of HCl gas when the reactants are:
A) Below 2000C.
B) Above 2000C
i) 
ii) HCl gas is highly soluble in water almost at the ratio of 1:450. So HCl gas undergoes back suction due to which the source of HCl will be affected.
A) NaCl +H2SO4 ---> NaHSO4 +HCl
B) 2NaCl +H2SO4 ----> Na2SO4 +2HCl
