Tin plague means :
Correct answer: B. Conversion of white tin to grey tin
- A. Tin plating
- B. Conversion of white tin to grey tin
- C. Emission of sound while bending a tin plate
- D. Conversion of stannous salts to stannic salts.
Explanation
Option B is correct. Tin plague is the conversion of white tin to grey tin. White tin is the stable form of tin at room temperature. Grey tin is the metastable form of tin. Grey tin is less dense than white tin, and it has a higher electrical conductivity. Tin plague occurs when white tin is exposed to temperatures below 13.2°C (55.8°F). At these temperatures, the white tin atoms rearrange themselves to form the grey tin structure. This process is called recrystallization.Option A, C, and D are incorrect as they do not accurately define tin plague and provide information unrelated to the phenomenon being asked about in the question.
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The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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