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Q.

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A student added a metal in native form to another metal salt solution and after some time he found that the colour of the metal salt solution fades away and a reddish brown deposit is observed. Imagine the reaction M+NXMX+N . Then choose the correct possibilities for M, N and NX respectively

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a

Al,Cu,CuSO4

b

Na,Cu,CuSO4

c

All

d

Zn,Cu,CuCl2

answer is D.

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Detailed Solution

Reactivity series

K>Na>Ca>Mg>Al>Zn>Fe>Sn>Pb>H>Cu>Hg>Ag>Au

Less reactive metals displaced by highly reactive metals.

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