Question:
Among the following compounds I-IV, which one forms a yellow precipitate on reacting sequentially with (i) $\mathrm{NaOH}$ (ii) dil. $\mathrm{HNO}_{3}$ (iii) $\mathrm{AgNO}_{3}$ ?
Correct Option: 2,
Solution:
Other compounds halide can't be removed because corresponding $\mathrm{C}^{+}$is highly unstable.