Question

nh₄cl, an expectorant spell out the full name of the compound. part d sr(no₃)₂, produces red color in fireworks spell out the full name of the compound. part e kno₂, food preservative spell out the full name of the compound.

Explanation:

For $NH_4Cl$, ammonium is the cation and chloride is the anion. For $Sr(NO_3)_2$, strontium is the metal cation and nitrate is the poly - atomic anion. For $KNO_2$, potassium is the cation and nitrite is the anion.

Answer:

Ammonium chloride
Strontium nitrate
Potassium nitrite