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Potassium Dichromate

When FeCr2O4 ...

Question

When $F e C r_{2} O_{4}$ is fused with Sodium Carbonate in the presence of air, we get

A

Sodium dichromate

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B

Sodium oxide

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C

Sodium chromate

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D

Mixed oxide of Sodium and Chromium

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Solution

The correct option is C Sodium chromate
$F e C r_{2} O_{4}$ from Chromite ore is fused with Sodium Carbonate in the presence of air/oxygen to give Sodium Chromate, Iron (III) Oxide and $C O_{2}$ .
$4 F e C r_{2} O_{4} + 8 N a_{2} C O_{3} + 7 O_{2} \to 8 N a_{2} C r O_{4} + 2 F e_{2} O_{3} + 8 C O_{2}$

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F e C r_{2} O_{4}

is fused with Sodium Carbonate in the presence of air, we get

F e C r_{2} O_{4}

is fused with Sodium Carbonate in the presence of air, we get Sodium Chromate. If the filtrate from this reaction is acidified, we get:

F e C r_{2} O_{4}

is fused with Sodium Carbonate in the presence of air, we get Sodium Chromate. If the filtrate from this reaction is acidified, we get:

F e C r_{2} O_{4}

is fused with Sodium Carbonate in the presence of air, we get

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