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Extraction of Aluminium

KCl, CuCl, Cu...

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KCl, CuCl, CuCl2 melting point order

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Q. Give the order of melting points:

K C l, C u C l, C u {C l}_{2}

Q. The following data is known about the melting of

K C l

:

Δ H = 7.25 k J {m o l}^{- 1}; Δ S = + 0.007 K J K^{- 1} {m o l}^{- 1}

Calculate its melting point.

Q. The halide with the highest melting point among

K C l, K I, K F, K B r

KCl has higher melting point than AgCl. Why?

[ $r_{A g^{+}}$ $\approx$ $r_{K^{+}}$ ]

Q. Assertion :Potassium is not obtained by the electrolysis of fused

K C l

. Reason: Potassium vapourises at the melting point of

K C l

.

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