Question

salt and commonly used in bakery products on heating get convert into another salt B which itself is used for removal of hardness of water and gas c the gas see when passed through lime water turns milky identify ABC with reaction

Answer 1

Salt A→ Sodium Bicarbonate 

$NaHCO _{3} =Na_{2}CO_{3}+H_{2}O+CO_{2}$

Salt B→Sodium Carbonate 

$Na_{2}CO_{3}+10H_{2}O =Na_{2}CO_{3}.10H_{2}O$

Gas C→ Carbon dioxide

$Ca(OH)_{2} + CO_{2}=CaCO_{3}+H_{2}O$