Question

Assertion : Decoration pieces made of silver lose their shine after sometime.

Reason : This is due to the presence of traces of SO2 present in air.

a) both are true and reason is correct explanation of assertion.
b) both are true but reason is not the correct explanation of assertion.
c) reason is true assertion of false.
d) assertion is true reason is wrong​

Answer 1

Answer:

BOTH ASSERTION AND REASON ARE CORRECT. R IS CORRECT EXPLANATION OF A

Explanation:

silver reacts with so2 present in air to form silver sulphide(agS).this cause corrosion

Answer 2

Answer:

Metals gradually deteriorate due to corrosion, which is brought on by the action of air, moisture, or a chemical reaction (such as an acid) on their surface.

Explanation:

Assertion: Decoration pieces made of silver lose their shine after sometime.

• After some time, when the decoration pieces made of silver come into contact with the environment, they lose their shine.

Reason: This is due to the presence of traces of SO₂ present in the air.

• Sulfur dioxide is formed by the reaction of hydrogen sulfide gas with oxygen gas present in the environment.

• This sulfur dioxide when comes in contact with the silver, a chemical reaction occurs which is as follows below:

                Ag (s) + H₂S (g) + O₂ (g) → Ag₂S ↓ (s) + H₂O (l)  

• Thus, silver gets corroded and it forms the black precipitate of silver sulfide.

• Therefore, the shine of the silver becomes dull.

Silver should be stored in a dry, well-ventilated area devoid of sulfurous materials.

Hence, both are true and the reason is the correct explanation of the assertion.

The correct option is (a).

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