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प्रश्न
State the following pertaining to the physical properties of hydrogen: Colour & odour
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उत्तर
Colour and odour of hydrogen gas colourless. Odourless.
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संबंधित प्रश्न
Give reasons for the following:
Hydrogen can be used as a fuel.
Describe two chemical properties of hydrogen with equations.
Hydrogen is evolved when dilute HCl reacts with magnesium, but nothing happens in the case of mercury and silver. Explain.
Under what conditions can hydrogen be made to combine with sulphur?
Name the products and write the equation for the reaction.
Under what conditions can hydrogen be made to combine with oxygen?
Name the products and write the equation for the reaction.
Choose terms from the options given in brackets to complete this sentence.
Hydrogen is ………………… soluble in water.
(sparingly, highly, moderately)
With reference to the uses of hydrogen, give reason for the following:
A mixture of hydrogen & oxygen on burning, find application in welding & cutting metals.
Complete and balance the equation:
Conversion of hydrogen to -
Water - 2H2 + O2 → ________
State the use of hydrogen –
In hydrogenation of oil and coal
State the use of hydrogen –
In the extraction of metals
