6. Identify the following reactions as addition (s), decomposition (d), single (sd)-
or double-displacement(dd), or combustion(c).
a. N₂(g) + 3H₂(g)-2NH₂(g)
b. NH.NO,(s)-N₂O(g) + 2H₂O (g)
c. AgNO3(aq) + NaCl (aq)-AgCl (s) + NaNO,(aq)
d. Fe (s) +H₂SO,(aq)-H₂(g) + FeSO (aq)