Question

Study the following reactions and mark the correct properties shown by water

(i) $SO_{3} + H_{2}O \rightarrow H_{2}SO_{4}$

(ii) $Cl_{2}O_{7} + H_{2}O \rightarrow 2HCIO_{4}$

(iii) $CaO + H_{2}O \rightarrow Ca(OH)_{2}$

(iv) $Na_{2}O + H_{2}O \rightarrow 2NaOH$

• A. All order react with water to give hydroxides.
• B. Acidic oxides are formed by metals and basic oxides by non-metals.
• C. Non-metal oxides combine with water to form acids while metallic oxides combine with water to form alkalies.
• D. Acidic oxides are stronger than basic oxides since they form strong acids.

Answer 1

Answer: (C)

Non-metal oxides combine with water to form acids while metallic oxides combine with water to form alkalies.

Answer 2

: Acidic oxides form acids while basic oxides form alkalies with water.