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Electrometallurgy

Each of the t...

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Each of the three metals x, y and z were put in turn into aqueous solution of the other two. x + salt of y (or z) = y (or z) + salt of x. Which one of the following observation is incorrect? (1) y + salt of x = no action observed (2) y + salt of z = z + salt of y (3) z + salt of x = x + salt of z (4) z + salt of y = no action observed

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