Question

Na, K and Ca metals form basic oxides.​ GIVE REASON

Answer 1

Na, K and Ca metals form basic oxides because  they react with water to produce hydroxides (alkalies) .

Na, K, and Ca metals form basic oxides because:

• Basic oxides are the oxides of metals. Na, K and Ca are soluble in water, they react with water to produce hydroxides (alkalies) e.g.,

CaO+H2O→Ca(OH)2

K2O+H2O→2KOH

Na2O+H2O→2NaOH

• These metallic oxides are known as basic anhydrides. They react with acids to produce salts, e.g.,

CaO+2HCl→CaCl2+H2O

Na2O+H2SO4→Na2SO4+H2O