write in past tense :
A clean woulfe's bottle is taken and some granulated zinc pieces
are put into it.
It is fitted with thistle funnel and delivery tube with the help of
corks.
Apparatus is made air tight.
Air tight apparatus is connected with gas jar filled with water over
water trough through delivery tube.
Dilute sulphuric acid is poured through thistle funnel.
The gas is collected in gas jar by downward displacement of
water.
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why did u write wrong subject of this question
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