3. Observe the given diagram and answer the following questions.
(i) Which gas is produced by the reaction? (ü) Describe the chemical reaction involved in the process. (Only chemical reaction)
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Answer:In the following schematic diagram for the preparation of hydrogen as as shown in given figure, what would happen if the following changes are made?
(a) In place of zinc granules, same amount of zinc dust is taken in the test tube.
(b) Instead of dilute sulphuric acid, dilute hydrochloric acid is taken
(c) In place of zinc, copper turnings are taken
(d) Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.
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Answer:
Hydrogen gas is formed
Displacement of h from water takes place due to Mg crystal
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