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Which of the following substances is used for making glass mirrors?

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Pure Sn

Pure Fe

Zinc amalgam

Tin-mercury amalgam

answer is D.

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Detailed Solution

Incorrect Option (1):

Tin-mercury amalgam is used for making mirrors, not pure $Sn$ .Thus, it is incorrect.

Incorrect Option (2):

Tin-mercury amalgam is used for making mirrors, not pure Fe. Thus, it is incorrect.

Incorrect Option (3):

Tin-mercury amalgam is used for making mirrors, not zinc amalgam. Thus, it is incorrect.

Correct Option (4):

In the manufacturing process of glass mirrors, tin-mercury amalgam used during 16^th to 20^th century. During this process, a layering of tin foil and liquid Hg is applied on the glass.

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