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Comprehension-20: (Q.66 to Q. 69)
\( (A) \), an important laboratory reagent, turns red litmus blue, imparts golden yellow color in flame, and is a good precipitating agent. \( (A) \) reacts with \( \mathrm{Zn} \) or \( \mathrm{Al} \) forming \( \mathrm{H}_{2} \) gas. (A) gives white ppt with \( \mathrm{ZnCl}_{2} \) or \( \mathrm{AlCl}_{3} \) but ppt. dissolves in excess of \( (A) \).
What is the nature of \( A \) ?
(a) Acidic
(b) Basic
(c) Amphoteric
(d) None of these
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