Which of the following will not change the or | vedclass

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(C) In an acidic medium,$K_2Cr_2O_7$ acts as a strong oxidizing agent and is reduced to $Cr^{3+}$ ions,which are green in colour.$KBr$ provides $Br^-$

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$Na_2SO_4$

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(C) In an acidic medium,$K_2Cr_2O_7$ acts as a strong oxidizing agent and is reduced to $Cr^{3+}$ ions,which are green in colour.$KBr$ provides $Br^-$ ions,which are oxidized to $Br_2$.$NaNO_2$ provides $NO_2^-$ ions,which are oxidized to $NO_3^-$.$FeSO_4$ provides $Fe^{2+}$ ions,which are oxidized to $Fe^{3+}$.However,$Na_2SO_4$ contains $SO_4^{2-}$ ions,which are already in their highest oxidation state $(+6)$ and cannot be further oxidized by $K_2Cr_2O_7$. Therefore,it will not cause the reduction of $K_2Cr_2O_7$ to $Cr^{3+}$ and will not change the colour.

Which of the following will not change the orange colour of $K_2Cr_2O_7$ into green colour in an acidic medium?

Similar Questions

Which of the following shows a metal being oxidised?

In the given equation,potassium dichromate acts as an oxidant in an acidic medium: $Cr_2O_7^{2-} + 14H^+ + 6e^- \rightarrow 2Cr^{3+} + 7H_2O$. The equivalent weight of $K_2Cr_2O_7$ is (Molecular weight $= M$):

In the following reaction,identify the oxidation states of the underlined phosphorus atoms in the products formed by complete hydrolysis at $R.T.$:
$H_4\underline{P}_2O_6 + H_2O \longrightarrow H_3PO_3 + H_3PO_4$

Which of the following is not an oxidation-reduction reaction?

When an acidic solution of $K_2Cr_2O_7$ is added to $Na_2SO_3$,it turns green. Which of the following compounds is formed in this reaction?

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