(a) Name the main ore of mercury. How is mercury obtained from its ore

1.	(a) Name the main ore of mercury. How is mercury obtained from its ore? Give balanced chemical equation. (b) What is thermite reaction? How is it used to join the railway tracks or cracked machine parts? (c) Name the method used to extract metals of high reactivity.
Answer» (a) Cinnabar Mercury is obtained from its ore by roasting. HgS +O₂ → Hg + SO₂ (b) When aluminium is heated with Fe₂O₃ to get molten iron, it is called thermite reaction. Fe₂O₃ + 2Al → Al₂O₃ + 2Fe Molten iron is used to weld broken railway tracks. (c) Electrolytic reduction

(a) Name the main ore of mercury. How is mercury obtained from its ore? Give balanced chemical equation. (b) What is thermite reaction? How is it used to join the railway tracks or cracked machine parts? (c) Name the method used to extract metals of high reactivity.

Answer»

(a) Cinnabar Mercury is obtained from its ore by roasting.

HgS +O₂ → Hg + SO₂

(b) When aluminium is heated with Fe₂O₃ to get molten iron, it is called thermite reaction.

Fe₂O₃ + 2Al → Al₂O₃ + 2Fe

Molten iron is used to weld broken railway tracks.