Sodium chromate

CHEMISTRY · Single correct · CBSE · Chemistry · d- and f-Block Elements · d- and f-Block Elements

Problem

Sodium chromate,

\text{Na}_2\text{CrO}_4

is made commercially by : (1) heating mixture of

\text{Cr}_2\text{O}_3

and

\text{Na}_2\text{CO}_3

(2) heating mixture of chromite ore and sodium carbonate in the presence of oxygen (3) heating sodium dichromate with sodium carbonate (4) reacting

\text{NaOH}

with chromic acid