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p Block Elements Part 1

Section: Chemistry

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Question : 88

Total: 100

The soldiers of Napoleon army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey power. The transformation is related to

a change in the partial pressure of oxygen in the air
a change in the crystalline structure of tin
an interaction with nitrogen of the air at very low temperature
an interaction with water vapor contained in the humid air

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