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Which of the following characteristics is common to hydrogen, nitrogen, oxygen, and carbon dioxide?
They are all diatomic
They are all gases at room temperature.
They are all coloured.
They all have same reactivity.
All exist as gases at room temperature. All except carbon dioxide are diatomic. None of the given gases is coloured. They vary in reactivity also. So, b is the correct answer.
By: Ketan Garg ProfileResourcesReport error
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