Question

Following observations were made for three unknown solutions A, B and C. Choose the correct option regarding these solutions based on the data provided below.

Compound	pH paper	Type of dissociation
A	Yellow	Partial
B	Blue	Partial
C	Red	Complete

• A. A is a strong acid.
• B. pH of B < pH of C.
• C. B is a strong base.
• D. Concentration of $H^{+}$ is more in C than that in A.

Answer 1

The correct option is D Concentration of $H^{+}$ is more in C than that in A.

The solution of compound A imparts yellow color to pH paper and undergoes partial dissociation. Therefore it is a weak acid.

The solution of compound B imparts blue colour to pH paper and it also undergoes partial dissociation. Therefore it is a weak base.

The solution of compound C imparts red color to pH paper and undergoes complete dissociation. Therefore it is a strong acid.

Since, C is a strong acid and A is a weak acid. Therefore, the concentration of $H^{+}$ is more in C than that in A.

Hence, the correct answer is option (d).