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प्रश्न
Where does hydrogen occur in a free state?
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उत्तर
In the free state, hydrogen is found in traces in the earth's crust and atmosphere. Volcanic gases contain 0.025%, the earth's crust 0.98%, the earth's atmosphere 0.01% and the atmosphere of the Sun and stars 1.1%.
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संबंधित प्रश्न
Fill in the blank
Hydrogen is ...................soluble in water.
For laboratory preparation of hydrogen, give the following:
materials used
Why nitric acid is not used in the preparation of hydrogen?
Why hot concentrated sulphuric acid is not used in the preparation of hydrogen?
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Give reason for the following:
In the preparation of hydrogen by electrolysis of water – the distilled water used is acidified.
Select the correct options for the following statement:
The metallic compound formed when a metal above aluminium in the activity series reacts with steam.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white substance which leaves an amphoteric oxide as a residue [whose colour varies in the heated and in the cold state] and evolves a gas which turns lime water milky.
Complete and balance the equation:
[General method]
Reactions of metals with steam
Aluminium - 2Al + 3H2O → ______+ _______ [g]
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
