Electron Dot Structure of Compound Formed between Metal 'X' and Non-metal 'Y':

• Metal 'X' loses two electrons, represented as X2+.
• Non-metal 'Y' gains one electron, represented as Y-.
• The compound formed between them is ionic, as it involves the transfer of electrons from the metal to the non-metal.
• It has a high melting point due to strong electrostatic forces of attraction between oppositely charged ions.
• It will conduct electricity in the molten state or in aqueous solution, as the ions are free to move and carry electric charge.
• It may or may not be soluble in water, depending on the specific properties of the compound formed.

Identification and Properties of Metals Mn, Zn, Fe, and Cu:

• (a) Zn will not displace H2 from dil. HCl.
• (b) Fe will react only with steam to give H2(g).
• (c) Cu will give H2 with 5% HNO3.
• Chemical reactions:
  • Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)
  • Fe(s) + 3H2O(g) → FeO(s) + 3H2(g)
  • Cu(s) + 2HNO3(aq) → Cu(NO3)2(aq) + H2(g)

Identification and Reaction of Compound X with Aluminium:

• (a) Compound X used to join railway tracks is thermite, which is a mixture of iron(III) oxide (Fe2O3) and aluminium powder.
• (b) The reaction is a thermite reaction.
• (c) Reaction:
  • Fe2O3(s) + 2Al(s) → 2Fe(l) + Al2O3(s) + heat

Identification of Non-metal A and Its Oxides B and C:

• Non-metal A is carbon (C).
• Oxide B is carbon monoxide (CO), which is toxic.
• Oxide C is carbon dioxide (CO2), which contributes to global warming.