Which of the following pair of acid radicals can be distinguished by using $d i l . H_{2} S O_{4}$ ?

C_{2} O_{4}^{2 -}

and

N O_{3}^{-}

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N O_{3}^{-}

and

N O_{2}^{-}

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C l^{-}

and

B r^{-}

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H C O_{3}^{-}

and

C O_{3}^{2 -}

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Solution

The correct option is B $N O_{3}^{-}$ and $N O_{2}^{-}$
Option (B) is correct.

$N O_{3}^{-}$ and $N O_{2}^{-}$ can be distinguished by using $d i l . H_{2} S O_{4}$ .

(a): ${\begin{matrix} \to C_{2} O_{4}^{2 -} + 2 H^{+} d i l . H_{2} S O_{4} - ----- \to N o v a p o u r s o r g a s i s e v o l v e d \to N O_{3}^{-} : N o r e a c t i o n w i t h d i l . H_{2} S O_{4} \end{matrix}$

(b) see the given image. Hence, distinction is possible.

(c) Both $C l^{-}$ and $B r^{-}$ have no reaction with $d i l . H_{2} S O_{4}$ .

(d) Both $H C O_{3}$ and $C O_{3}^{2 -}$ produce $C O_{2} ↑$ which evolves with effervescences.

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Similar questions

Which of the following are iso-electronic and iso-structural?

$N O_{3}^{-}$ , $C O_{3}^{2 -}$ , $C l O_{3}^{-}$ , $S O_{3}$

N O_{3}^{-}, C O_{3}^{2 -}, C l O_{3}^{2 -}, S O_{3}

Which of the following, are isoelectronic and isostructural ?

$N O_{3}^{-}, C O_{3}^{2 -}, C l O_{3}^{-}, S O_{3}$

N - O

N O_{2}^{+}

N O_{2}^{-}

N O_{3}^{-}

N O_{2}^{+}, N O_{2}^{-}

N O_{3}^{-}

N - O

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