Among I-A elements, which element is gas at room temperature?
Hydrogen
Lithium
Sodium
Potassium
A
Lithium
B
Hydrogen
C
Sodium
D
Potassium
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Solution
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At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, non-metallic, highly combustible diatomic gas. It is highly flammable and forms an explosive mixture with air.
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