Which of the following statement(s) is(are) c | vedclass

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(d) Ferrous salts react with potassium ferricyanide to give blue colouration due to the formation of Tumbull&rsquo;s blue in this reaction, first ferr

Vedclass · Accepted Answer

Both $(b)$  and  $(c)$

Vedclass · Answer

(d) Ferrous salts react with potassium ferricyanide to give blue colouration due to the formation of Tumbull&rsquo;s blue in this reaction, first ferrous salt is oxidised to ferric salt by the ferricyanide ion which itself is reduced to ferrocyanide.

$F{{e}^{+2}}+\underset{	ext{Ferricyanide}}{\mathop{{{[Fe{{(CN)}_{6}}]}^{3-}}}}\,	o F{{e}^{+3}}+\underset{	ext{Ferrocyanide}}{\mathop{{{[Fe{{(CN)}_{6}}]}^{4-}}}}\,$

$F{{e}^{+3}}+{{[Fe{{(CN)}_{6}}]}^{4-}}	o {{\{Fe[Fe{{(CN)}_{6}}]\}}^{-}}$

$F{{e}^{+3}}+{{[Fe{{(CN)}_{6}}]}^{4-}}+{{K}^{+}}	o \underset{\begin{smallmatrix} 
 	ext{Pot}	ext{. ferric ferro cyanide} \ 
 	ext{or Tumbull }\!\!'\!\!	ext{ s blue } 
\end{smallmatrix}}{\mathop{K\{Fe[Fe{{(CN)}_{6}}]\}}}\,$Ferric ions react with potassium thiocyanate to give blood red colouration due to the formation of ferric thiocyanate

$FeC{{l}_{3}}+3KCNS	o \underset{\begin{smallmatrix} 
 	ext{Ferric}\,	ext{thiocyanate} \ 
 \,\,\,\,\,\,\,	ext{(Blood}\,	ext{red)} 
\end{smallmatrix}}{\mathop{Fe{{(CNS)}_{3}}+3KCl}}\,$

Which of the following statement(s) is(are) correct with reference to the ferrous and ferric ions

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