Question

Among the following nitrates, lead nitrate, silver nitrate and ammonium nitrate, the one that decomposes without leaving any solid residue is:

• A. Lead nitrate
• B. Ammonium nitrate
• C. Silver nitrate
• D. Sodium nitrate

Answer 1

Answer: (B)

Ammonium nitrate

$2Pb\left(N{O}_3{)}_2\stackrel{\Delta }{\to }2PbO\right(s)+4N{O}_2\uparrow +O_2\uparrow$

$N{H}_{4}N{O}_3\left(s\right)\underset{}{\overset{\Delta }{\to }}2H_{2}O\uparrow +N_{2}O\uparrow$

$2AgN{O}_3\left(s\right)\stackrel{\Delta }{\to }2Ag\left(s\right)+2N{O}_2\left(g\right)+O_2\left(g\right)$

Lunar caustic

$2NaN{O}_3\left(s\right)\underset{}{\overset{\Delta }{\to }}2NaN{O}_2\left(s\right)+O_2\uparrow$