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Hydrogen from Acids

The plague of...

Question

The plague of tin is the:

A

conversion of stannous to stannic

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B

conversion of white tin to grey tin

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C

emission of sound while bending a tin rod

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D

atmospheric oxidation of tin

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Solution

The correct option is B conversion of white tin to grey tin
The plague of tin is the conversion of white tin to grey tin. It's an autocatalytic, allotropic transformation of the element tin, which causes deterioration of tin objects at low temperatures.

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Q. A cell with two electrodes, one of grey tin and the other white tin, both dipped in solution of

(N H_{4})_{2} S n C l_{6}

showed zero e.m.f. at 18

^{o}

C. What conclusion may be drawn from this?

Q. Calculate difference between

Δ

Δ

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=

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