Types of Compounds that undergo Gas Evol & nonmetals w/ oxidation states

Gas product evolved from sulfides

$H_2S(g)$, with no intermediate form.

Intermediate & gas evolved from carbonates and bicarbonates

Intermediate: $H_2CO_3(aq)$ | Gas: $CO_2(g)$

Intermediate & gas evolved from sulfites and bisulfites

Intermediate: $H_2SO_3(aq)$ | Gas: $SO_2(g)$

Intermediate & gas evolved from ammonium

Intermediate: $NH_4OH(aq)$ | Gas: $NH_3(g)$

Oxidation state of Fluorine

$$-1$$

Oxidation state of Hydrogen/Group 1

$$+1$$

Oxidation state of Oxygen

$$-2$$

Oxidation state of Group 7A

$$-1$$

Oxidation state of Group 6A

$$-2$$

Oxidation state of Group 5A

$$-3$$

Oxidation state of Group 2

+2