A solution of a salt in dilute sulphuric acid imparts deep blue colour with starch iodine solution it…

A solution of a salt in dilute sulphuric acid imparts deep blue colour with starch iodine solution it confirms the presence of which of the following
  1. \(\mathrm{NO}_{2}^{-}\)
  2. \(\mathrm{I}^{-}\)
  3. \(\mathrm{NO}_{3}^{-}\)
  4. \(\mathrm{CH}_{3} \mathrm{COO}^{-}\)

Solution

A solution of a salt in dilute sulphuric acid imparts deep blue colour with starch iodine solution it confirms $\mathrm{NO}_{2}{ }^{-}$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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