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JAMB - Chemistry (2018 - No. 62)

The presence of ammonia gas in a desiccator can exclusively be removed by
phosphorus (V) oxide
fused calcium chloride
calcium oxide
concentrated tetraoxosulphate (VI) acid

توضيح

Ammonia gas can be removed from a dessicator by adding a conc. H2SO4 so as to neutralize it since ammonia gas is basic.

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