Question

Identify which of these are basic:

(i) $CaC{O}_3$
(ii) $NaHC{O}_3$
(iii) $KOH$
(iv) $MgC{l}_2$
(v) $NaOH$
(vi) $C{H}_{3}COOH$

• A. (i), (ii), (iii), (iv)
• B. (i), (ii), (iv), (v)
• C. (iii), (iv)
• D. (iv)

Answer 1

The correct option is A (i), (ii), (iii), (iv)

Bases are those substances which give out hydroxyl ions (${\text{OH}}^{–}$) in their aqueous solution. They turn the color of red litmus paper blue.

Calcium carbonate, sodium bicarbonate, ammonia, sodium hydroxide and potassium hydroxide are basic in nature. Magnesium chloride is a neutral salt and ethanol is a carboxylic acid.