Question

4. Dry hydrogen gas is passed over a
powdered solid and then through
cooled U-tube before the excess of
hydrogen is burned in air.

A colourless liquid collects in the U-tube.
What could the powdered solid be?
A calcium oxide
B copper(II) oxide
C magnesium
D zinc oxide

Answer 1

zinc oxide is the powdered solid

Answer 2

Answer:

Zing Oxide

Explanation:

Zinc oxide is an inorganic compound with the formula ZnO. ZnO is a white powder that is insoluble in water.

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