Home
Class 12
CHEMISTRY
Which of the following compounds is used...

Which of the following compounds is used as the startingn material for the preparation of potassium dichromate?

A

`K_(2)SO_(4).Cr(SO_(4))_(3).24H_(2)O` (chrome alum)

B

`PbCrO_(4)` (Chrome yellow)

C

`FeCr_(2)O_(4)`(chromite)

D

`PbCrO_(4).PbO`(chrome red)

Text Solution

Verified by Experts

The correct Answer is:
C
`4FeO.Cr_(2)O_(3)("chromite ore")+8Na_(2)CO_(3)+7O_(2)undersetto("Roasting in air") 8Na_(2)CrO_(4)+2Fe_(2)O_(3)+8CO_(2)`
`2Na_(2)CrO_(4)+H_(2)SO_(4) to Na_(2)Cr_(2)O_(7)+NaSO_(4)+H_(2)O,Na_(2)Cr_(2)O_(7)+2KCltoK_(2)Cr_(2)O_(7)toK_(2)Cr_(2)O_(7)+2NaCl`
Promotional Banner

Topper's Solved these Questions

  • D BLOCK ELEMENTS

    RESONANCE|Exercise EXERCISE-I PART-III|15 Videos

  • D BLOCK ELEMENTS

    RESONANCE|Exercise EXERCISE-2 PART-I|27 Videos

  • D BLOCK ELEMENTS

    RESONANCE|Exercise EXERCISE-I PART-I|40 Videos

  • D & F BLOCK ELEMENTS

    RESONANCE|Exercise INORGANIC CHEMISTRY(d & f- Block Elments)|40 Videos

  • DPP

    RESONANCE|Exercise QUESTIONS|223 Videos

Similar Questions

Explore conceptually related problems

Which of the following compounds is used as the starting material for the preparation of potassium dichromate?

Which of the following compound is the starting material for the preparation of CH_3I ?

________ is used as the starting material for the preparation of iodoform .

Which among the following sets of compounds is used as raw material for the preparation of sodium carbonate by Solvay process?