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
• B. a change in crystalline structure of tin
• C. a change in the partial pressure of $O_2$ in air
• D. an interaction with $N_2$ of air at low temperature

Answer 1

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.