Question

Consider the following statements.
a. Baking soda is an acidic salt whereas washing soda is a basic salt.
b. The aqueous solution of common salt does not change the colour of either red litmus solution or blue litmus solution.
c. Amla tastes sour whereas soap solution is bitter in taste.
d. The water extract of spinach does not change the colour of blue litmus solution.
Which of the statements are correct?

• A. a, b and c
• B. a and c
• C. b and c
• D. b and d

Answer 1

The correct option is C b and c

Baking soda ($NaHC{O}_3$) is an acidic salt but washing soda ($N{a}_{2}C{O}_3$) is not basic salt. The aqueous solution of common salt is neutral in nature.
$NaCl\left(s\right)+H_{2}O\left(l\right)\to N{a}^{+}\left(aq\right)+C{l}^{-}\left(aq\right)$
Amla contains ascorbic acid and soap contains base (caustic soda or sodium hydroxide) spinach contains oxalic acid and thus its aqueous solution change colour of blue litmus to red.