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In the following schematic diagram for t...

In the following schematic diagram for the preparation of hydrogen gas as shown in figure, what would happen if following changes are made ?

In place of zinc granules, same amount of zinc dust is taken in the test tube.

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When zinc dust is taken instead of zinc granules to react with sulphuric acid, the hydrogen gas is formed. But the rate of reaction increases in the case of zinc dust compared to the zinc granules, because of increase in surface area the rate of reaction increases. Thus, when zinc dust is used in the place of zinc granules, hydrogen gas is produced at a faster rate.
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In the following schematic diagram for the preparation of hydrogen gas as shown in the 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.

In the following schematic diagram for the preparation of hydrogen gas as shown in figure, what would happen if following changes are made ? In place of zinc, copper turnings are taken.

In the following schematic diagram for the preparation of hydrogen gas as shown in figure, what would happen if following changes are made ? Instead of dilute sulphuric acid, dilute hydrochloric acid is taken.

In the following schematic diagram for the preparation of hydrogen gas as shown in figure, what would happen if following changes are made ? Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.

Give reason for the following: Zinc granules are preferred for the laboratory preparation of hydrogen rather than pure zinc.

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