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प्रश्न
Select the correct answer from the symbol in the bracket.
The element, which like hydrogen has one valence electron.
पर्याय
He
Na
F
O
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उत्तर
Na
APPEARS IN
संबंधित प्रश्न
Give reason for the following:
Helium replaced hydrogen in weather observation balloons?
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MULTIPLE CHOICE QUESTIONS
Which is the lightest of all elements?
- hydrogen
- helium
- lithium
- none of these
FILL IN THE BLANK
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Hydrogen is dried by passing it through conc. H2SO4.
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Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
Give a reason for the following.
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
