The yellow colour solution of Na2CrO4 changes to orange red on passing CO2 gas due to the formation of:
CrO3
Cr2O2−7
Cr2O3
CrO5
A
CrO5
B
Cr2O2−7
C
Cr2O3
D
CrO3
Open in App
Solution
Verified by Toppr
The yellow coloured solution of Na2CrO4 changes to orange red on passing CO2 due to the formation of dichromte ion, Cr2O2−7.
The reaction is as follows: CO2+H2O→H2CO3⇌2H++CO2−3
2CrO2−4+2H+⇌Cr2O2−7(orange red)+H2O
Was this answer helpful?
4
Similar Questions
Q1
The yellow colour solution of Na2CrO4 changes to orange red on passing CO2 gas due to the formation of:
View Solution
Q2
The yellow coloured solution of chromate salt changes to orange colour on acidification due to the formation of :
View Solution
Q3
On passing CO2 into aqueous yellow coloured CrO2−4 solution, an orange coloured Cr2O2−7 solution is obtained. Is this oxidation or reduction? The reaction is given below: CrO2−4(aq)CO2−−→Cr2O2−7
View Solution
Q4
If CO2 (g) under pressure is passed into Na2CrO4(aq), yellow colour solution changes to another coloured solution. What is it ?
View Solution
Q5
When sulphur dioxide gas is passed through acidified potassium dichromate solution, the colour of the solution changes from :
(1) orange to yellow
(2) orange to green
(3) green to orange
(4) yellow to green