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Standard X
Chemistry
Zinc Ion
In the schema...
Question


In the schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if the following changes are made?
In place of zinc granules, the same amount of zinc dust is taken in the test tube.

80242_2b4f14b824154fafb558c439597d32da.png

A
Hydrogen gas will evolve with lesser speed.
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B
Hydrogen gas will evolve with greater speed.
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C
No gas would be evolved.
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D
Zinc dioxide gas would be formed.
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Solution

The correct option is B Hydrogen gas will evolve with greater speed.

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 an increase in the 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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Q. In the following schematic diagram for the preparation of hydrogen gas as shown in figure, what would happen if in place of Zn granules same amount of zinc dust is taken in the test tube?
80713_9da12de93390430596f9dfe3eefe4914.png
Q.
In the above followings schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if following changes are made?

If sodium hydroxide is taken in place of sulphuric acid and the tube is heated then hydrogen gas will be liberated.

State whether true or false :

83519.jpg
Q.

In the lab preparation of hydrogen gas, what would happen(write chemical equation ) 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,HCL acid is taken

c)sodium hydroxide is taken in place of sulphuric acid and the tube is heated

d)in place of zinc,copper turnings are taken

Q. In a laboratory preparation of hydrogen gas, what would happen (write chemical reactions) if the following changes are made?
1) in place of zinc granules, same amount of zinc dust is taken in test tube
2) instead of dilute sulphuric acid, hydrochloric acid is taken
3) In place of zinc, copper turning are taken
4) sodium hydroxide is taken in place of sulphuric acid and tube is heated
Q. In the laboratory during preparation of hydrogen gas mention the changes that would occur. Also write the chemical reaction for the following changes?
@in place of zinc granules ,same amount of zinc dust is taken in the test tube
@instead of dilute sulphuric acid ,hydrochloric acid is taken
@in place of zinc, copper turnings are taken
@Sodium Hydroxide is taken in place of sulphuric acid and the tube is heated
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