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प्रश्न
Hydrogen is ______ than air.
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उत्तर
Hydrogen is lighter than air.
संबंधित प्रश्न
Name the following:
Two metals which give hydrogen with cold water.
Why nitric acid is not used in the preparation of hydrogen?
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
How did the name 'hydrogen' originate?
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
Starting from hydrogen gas how would you obtain a metal by reduction of its heated oxide.
Select the correct options for the following statement:
The product formed on combustion of hydrogen in air is ___.
Give a balanced equation for the following conversion.
\[\ce{NH3<-H2->H2S}\]
