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Question

The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniform. White metallic tin buttons got converted to grey powder. This transformation is related to:

A
an interaction with water vapour contained in humid air
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B
a change in crystalline structure of tin
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C
a change in the partial pressure of O2 in air
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D
an interaction with N2 of air at low temperature
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Solution

The correct option is B a change in crystalline structure of tin

White tin crumbles into a powder due to the formation of grey tin at low temperatures.


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