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(i) Write the equation for the laborator...

(i) Write the equation for the laboratory preparation of hydrogen.
(ii) How is the gas collected?
(iii) Write the confirmatory test for Hydrogen.

Text Solution

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(i) Hydrogen is prepared in laboratory by the action of dilute hydrochloric acid on granulated zinc.
`Zn+2HCl to ZnCl_2 + H_2 uarr`
(ii) Hydrogen gas is collected by downward displacement of water.
(iii) Hydrogen gas evolved is colourless and odourless and neutral to litmus. Hydrogen gas burns with a pale blue flame when a burning splinter is brought near it.
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