Which is the most suitable metal for the preparation of Hydrogen through Laboratory method?
Lead
Zinc
Copper
Potassium
Which is the most suitable metal for the preparation of hydrogen?
Give reason for the following
1. Nitric acid in the dilute form is not used in the laboratory preparation of hydrogen from metals.
2. Granulated zinc is preferred to metallic zinc in the preparation of hydrogen using dilute acid.
3. Hydrogen and alkali metals of group [1A] react with copper [II] oxide to give copper.
4. Hydrogen is collected by the downward displacement of water and not even though it is lighter than air.
5. A Mixture of hydrogen and chlorine can be separated by passage through a porous pot
Why is granulated zinc used in laboratory preparation of hydrogen and why is hydrogen collected by downward displacement of water?