d - block and f - block Elements
Potassium dichromate can be prepared by:
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Single Choice
How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?
ABy the action of concentrated sulphuric acid
Correct Answer
BBy roasting with soda ash
CBy the action of sodium hydroxide
DBy the action of lime stone
Solution
In the manufacture of potassium dichromate from chromite ore, sodium chromate is converted into sodium dichromate by the action of concentrated sulphuric acid.
$$\displaystyle 2Na_2CrO_4 + H_2SO_4 \rightarrow Na_2Cr_2O_7 + Na_2SO_4 + H_2O$$
SIMILAR QUESTIONS
d - block and f - block Elements
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
d - block and f - block Elements
Potassium dichromate on heating does not gives :
d - block and f - block Elements
Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing pH on a solution of potassium dichromate?
d - block and f - block Elements
Potassium dichromate is prepared from:
d - block and f - block Elements
Which of the following reactions do not result in the preparation of potassium dichromate from chromate? (I) 4$$FeCr_2O_4$$ + 8$$Na_2CO_3$$+ $$7O_2$$$$\rightarrow$$ (II) $$Na_2CrO_4$$ + $$H_2SO_4$$ $$\rightarrow$$ (III) $$Na_2Cr_2O_7$$+ $$2KCl$$$$\rightarrow$$
d - block and f - block Elements
Which of the following compounds is used as the starting material for the preparation of potassium dichromate?
d - block and f - block Elements
Name an ore used in the preparation of potassium dichromate.
d - block and f - block Elements
The chromate ion in acidic medium changes to ..............
d - block and f - block Elements
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
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