Hydrogen gas is obtained in the laboratory by:

action of dil.

H_{2} S O_{4}

on zinc granules

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action of dil.

H_{2} S O_{4}

on aluminum.

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action of dil.

H_{2} S O_{4}

on copper.

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None of these

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Solution

The correct option is A action of dil. $H_{2} S O_{4}$ on zinc granules
Hydrogen can be obtained in the laboratory by the action of dil. sulphuric acid or dilute hydrochloric acid on zinc granules.

Take zinc granules in a wolf's bottle and fix a two holed cork. now from one hole fit a thistle funnel and from the second hole of cork fix delivery tube. Now add dil.sulphuric acid through thistle funnel.
Dil. $H_{2} S O_{4}$ reacts with zinc to liberate $H_{2}$ gas. This released gas is collected by downward displacement of water.

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Similar questions

Q. Why are zinc granules used over pure zinc for the laboratory preparation of hydrogen gas?

Q. Hydrogen gas is prepared in the laboratory by reacting dilute

H C l

with granulated zinc. Following reaction takes place:

Z n + 2 H C l \to Z n C l_{2} + H_{2}

What would be the volume of hydrogen gas is liberated at STP when 32.65 g of zinc reacts with

H C l

Why is granulated zinc used in laboratory preparation of hydrogen and why is hydrogen collected by downward displacement of water?

Q. Zinc granules are used in laboratory preparation of hydrogen because it consists of _____ which acts as a catalyst and speeds up the rate of reaction.

Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place

$Z n + 2 H C l \to Z n C l_{2} + H_{2}$

Calculate the volume of hydrogen gas liberated at STP when 32.65 g of zinc reacts with HCl. 1 mol of a gas occupies 22.7 L volume at STP; atomic mass of Zn = 65.3u

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