Complete and balance the following equation:

(a) NH₃ (excess) + Cl₂

(b) XeF₆ + 2H₂O

OR

Write balanced chemical equations involved in the following reactions:

(a) XeF₄ reacts with SbF_5.

(b) Ag is heated with PCl_5.

Write IUPAC name of the complex [Co(en)₂Cl₂]⁺.

OR

Using IUPAC norms, write the formula of Sodium tetrachloridonickelate(II).

Arrange the following in increasing order of their acidic character:

Ethanol, phenol, water

Write any two oxoacids of sulphur and draw their structures.

Write the names of two fuels other than hydrogen used in fuel cell. Write two advantages of fuel cell over an ordinary cell.