Question

Example of
(i) Metal oxide + Water = Metal Hydroxide
(ii) Metal + Dil. acid = Salt + Hydrogen
(iii) Metal A + Salt sol. of metal B = Salt sol. of metal A + Metal B
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Answer 1

MgO+H2O..... Mg(OH)2

Na+HCl........NaCl+H2

Fe+CuSO4.....FeSO4+Cu

Answer 2

(I) CaO + H2O-> CA(OH)2 + heat

(ii)Cu + 2HCl-> CuCl2+H2

(iii) Fe +CuSO4 -> FeSO4 +Cu