8. In the laboratory preparation of hydrogen from zinc and dil. acid. Give reasons for the following:
a) The complete apparatus is air-tight.
b] Dilute nitric acid is not preferred as the reactant acid.
c] The lower end of the thistle funnel should dip below the level of the acid in the flask.'
d] Hydrogen is not collected over air.
a) The complete apparatus is air-tight.
b] Dilute nitric acid is not preferred as the reactant acid.
c] The lower end of the thistle funnel should dip below the level of the acid in the flask.'
d] Hydrogen is not collected over air.
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