Which of the following gases is heavier than oxygen?
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Oxygen molecule is ______.
What is the ratio of masses of hydrogen and oxygen in the water?
Match the following items.
The passage of an electric current through a conducting liquid causes ___________.
If we take a small amount of washing soda and add approximately 1 mL of dilute hydrochloric acid to it, what will we observe?
Lime water turns milky when carbon dioxide is passed through it. It is due to the formation of
Beryl is an ore/mineral of