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NEET levelSingle correct optionDifficulty 1 of 3df087

The ore used for the commercial preparation of potassium dichromate is

Apyrolusite, $MnO X_{2}$
Bmagnetite, $Fe X_{3} O X_{4}$
Cbauxite, $Al X_{2} O X_{3} \cdot 2 H X_{2} O$
Dchromite, $FeCr X_{2} O X_{4}$

Answer: D

Chromite is fused with sodium carbonate in air to give sodium chromate, which is acidified to sodium dichromate and then converted to

K X_{2} Cr X_{2} O X_{7}

using KCl.

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