How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?
By the action of concentrated sulphuric acid
By roasting with soda ash
By the action of lime stone
By the action of sodium hydroxide
A
By roasting with soda ash
B
By the action of sodium hydroxide
C
By the action of concentrated sulphuric acid
D
By the action of lime stone
Open in App
Solution
Verified by Toppr
In the manufacture of potassium dichromate from chromite ore, sodium chromate is converted into sodium dichromate by
the action of concentrated sulphuric acid. 2Na2CrO4+H2SO4→Na2Cr2O7+Na2SO4+H2O
Was this answer helpful?
3
Similar Questions
Q1
How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?
View Solution
Q2
When FeCr2O4 is fused with Sodium Carbonate in the presence of air, we get Sodium Chromate. If the filtrate from this reaction is acidified, we get:
View Solution
Q3
Explain the manufacture of potassium dichromate from chromite ore (FeCr2O4).
View Solution
Q4
When a mixture of solid sodium chloride,potassium dichromate is heated with concentrated sulphuric acid orange red vapours are formed, then compound formed is :
View Solution
Q5
Orange solution of potassium dichromate turns yellow on adding sodium hydroxide to it. Give reason.