For the given reaction,which of the following | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The reaction involves the reduction of dichromate $(Cr_2O_7^{2-})$ in acidic medium to chromium $(III)$ ions $(Cr^{3+})$,which are green in color.

Vedclass · Accepted Answer

$CO_2$

Vedclass · Answer

(A) The reaction involves the reduction of dichromate $(Cr_2O_7^{2-})$ in acidic medium to chromium $(III)$ ions $(Cr^{3+})$,which are green in color.$Cr_2O_7^{2-} + 14H^+ + 6e^- 	o 2Cr^{3+} + 7H_2O$$SO_2$ and $H_2S$ are strong reducing agents that can reduce $Cr_2O_7^{2-}$ to $Cr^{3+}$,thereby changing the color of the solution from orange to green.$CO_2$ is an acidic oxide and does not act as a reducing agent in this context,so it cannot reduce $Cr_2O_7^{2-}$ to $Cr^{3+}$.Therefore,$CO_2$ is not used to change the color.

For the given reaction,which of the following is not used to change the colour of the solution from orange to green?
$K_2Cr_2O_7 / H^{+} + y \to Cr^{+3} + \text{Others}$
$(\text{orange}) \quad \quad \quad (\text{green})$

Similar Questions

The oxide which cannot act as a reducing agent is

Which of the following is not a reducing agent?

The element which never acts as a reducing agent in a chemical reaction is

$Zn$ reacts with $H_2SO_4$ and $HCl$ to produce hydrogen gas,but it does not produce hydrogen gas with $HNO_3$ because:

Which of the following acts as an oxidizing agent?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

For the given reaction,which of the following is not used to change the colour of the solution from orange to green?$K_2Cr_2O_7 / H^{+} + y \to Cr^{+3} + \text{Others}$$(\text{orange}) \quad \quad \quad (\text{green})$