Read the given passage and answer the questions.
P, Q, R are different colourless solids, while S is a colourless solution. They are in random order) Sodium chloride (NaCl), Calcium Carbonate `(CaCO_(3))`, Acetic acid `(CH_(3)COOH)` and Phenolphthalein indicator. Small amount of the above substances were added in pairs (e.g. P with Q, Q with R etc.) to a small amount of water in a test tube. They give the following results as shown in the observation table.
Observation Table:

Which of the following reaction is incorrect ?

Options

A. Phenolphthalein `(P) + NaCl (Q) to ` No reaction
B. Phenolphthalein `+ CaCO_(3 ) (R) to ` Alkaline medium (Dark Pink Colour)
C. Phenolphthalein `+ NaCl to` Acidic medium (Blue colour)
D. `CaCO_(3) (R ) + 2CH_(3)COOH (S) to (CH_(3)COO)_(2)Ca + CO_(2) ` (effervescence) `+2H_(2)O`

Answer

C

Explanation

The correct reactions are:
(i) Phenophthalein `(P) + NaCl (Q) to` No reaction
(ii) Phenolphthalein `+ CaCO_(3) (R ) to ` Alkaline medium (Dark Pink Colour)
(iii) `CaCO_(3) (R ) + 2CH_(3)COOH (S) to (CH_(3)CO O)_(2)Ca + CO_(2)` (effervescence) `+ 2H_(2)O`