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Uses of Slaked Lime

With Cr2O3,...

Question

With $C r_{2} O_{3}$ , color of the bead in sodium carbonate-bead test is :

A

red

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B

blue

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C

yellow

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D

green

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Solution

The correct option is B yellow
Option (C) is correct.
With $C r_{2} O_{3}$ , color of the bead in sodium carbonate-bead test is yellow.
$2 C r_{2} O_{3}$ + $4 N a_{2} C O_{3} + 3 O_{2} \to 4 N a_{2} C r O_{4} + 4 C O_{2} ↑$

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