Potassium dichromate can be prepared by-heating powdered chromite ore with quicklime in the presence of airheating Na-2-CrO-4- solution with KCl solution and then coolingheating K-2-CrO-4- with sulphuric acidboth A and C

Question

Toppr Admin · Accepted Answer

Potassium dichromate is usually prepared by the reaction of potassium chloride on sodium dichromate.
$N a_{2} C r_{2} O_{7} + 2 K C l \to K_{2} C r_{2} O_{7} + 2 N a C l$

It can also be prepared by heating $K_{2} C r O_{4}$ with $H_{2} S O_{4}$ .
$2 K_{2} C r O_{4} + 2 H^{+} \to K_{2} C r_{2} O_{7} + 2 K^{+} + H_{2} O$

Hence, option D is correct.

Potassium dichromate can be prepared by:heating powdered chromite ore with quicklime in the presence of airheating Na2CrO4 solution with KCl solution and then coolingheating K2CrO4 with sulphuric acidboth A and C

Potassium dichromate is usually prepared by the reaction of potassium chloride on sodium dichromate. Na2Cr2O7+2KCl→K2Cr2O7+2NaClIt can also be prepared by heating K2CrO4 with H2SO4.2K2CrO4+2H+→K2Cr2O7+2K++H2OHence, option D is correct.

Potassium dichromate can be prepared by:
heating powdered chromite ore with quicklime in the presence of air
heating $N a_{2} C r O_{4}$ solution with $K C l$ solution and then cooling
heating $K_{2} C r O_{4}$ with sulphuric acid
both $A$ and $C$