See Answer
1: (b) Mercury, 2: (a) Sodium, 3: (c) Graphite, 4: (d) Basic, 5: (a) Acidic, 6: (b) Oxide, 7: (c) Sodium, 8: (b) Silver, 9: (a) Iron sulphate is formed, 10: (d) Potassium, 11: (c) Very high melting and boiling points, 12: (b) They are solids at room temperature, 13: (d) Gold, 14: (a) High in reactivity series, 15: (d) Zinc