$5.$ In the Solvay process, the ammonia recovery involves the reaction of $\_($a$)\_$ with $\_($b$)\_$ to produce $\_($c$)\_.$

$-$ a$)$ Ammonium chloride

$-$ b$)$ Calcium hydroxide

$-$ c$)$ Calcium chloride

$-$ Options:

$-$ i$)$ Sodium carbonate, Water, Carbon dioxide

$-$ ii$)$ Ammonium chloride, Calcium hydroxide, Calcium chloride

$-$ iii$)$ Calcium carbonate, Ammonia, Ammonium bicarbonate

$6.$ The membrane cell process for producing caustic soda uses $\_($a$)\_$ as the membrane, separates the $\_($b$)\_$ and $\_($c$)\_$ products effectively.

$-$ a$)$ Ion$-$selective

$-$ b$)$ Chlorine

$-$ c$)$ Sodium hydroxide

$-$ Options:

$-$ i$)$ Asbestos, Hydrogen, Chlorine

$-$ ii$)$ Ion$-$selective, Chlorine, Sodium hydroxide

$-$ iii$)$ Polymer, Sodium, Water