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Air and Atmosphere — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAir and Atmosphere2 Marks
Question
How will you obtain dry oxygen in the laboratory?
✓

Answer

Dry oxygen can be obtained if the gas so collected is passed f over a tower containing drying agents like phosphorus pentaoxide, fused calcium chloride or bubbling the gas through concentrated sulphuric acid. Then the dry gas is collected by downward displacement of mer – cury.

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