Question

Question 24.
Which of the following statements is not correct ?

(a) All metal carbonates react with acid to give a salt, water and carbon dioxide
(b) All metal oxides react with water to give salt and acid
(c) Some metals react with acids to give salt and hydrogen
(d) Some non-metal oxides react with water to form an acid

Answer 1

Most metal oxides are insoluble in water but few of them, such as ${\text{Na}}_2\text{O}$ and $\text{CaO}$ dissolve in water to form alkalies and not salt and acid. Mainly group I and group II metals react with water to form hydroxides. Other metals such as iron, chromium, etc do not react with water. Hence, the correct option is (c).