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Question
State what you would observe when the following substance are heated in a glass test tube:
Red lead
Solution
2Pb3O4 → 6PbO + O2 ↑
The dark red lead as red powder changes to yellow colour. The yellow colour residue on further heating sticks to the tube and give reddish colour to glass. A colourless and odourless gas is evolved.
shaalaa.com
Language of Chemistry
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