# Solvay process is used in the manufacture of :

$\begin {array} {1 1} (1)\;K_2CO_3 & \quad (2)\;KHCO_3 \\ (3)\;Na_2CO_3 & \quad (4)\;CaCl_2 \end {array}$

$(3)\;Na_2CO_3$
answered Nov 7, 2013 by