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Q.

Metal M3 reacted with a salt of metal M4. The products were M4 and salt of M3. However, metal M4 had no reaction with the salt of metal M3. What can you say about the reactions of M4 and M3?


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a

Displacement reaction

b

Double displacement reaction

c

Combination reaction

d

Redox reaction 

answer is A.

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Detailed Solution

detailed_solution_thumbnail
The reactions of M3 and M4 are displacement reactions.
Reactions in which less reactive element displaces more reactive element from a compound is called displacement reaction. Therefore, the reaction of M4 and M3 is a displacement reaction where M3 is more reactive than M4.
The reaction involved is:
M3+  salt of M4 M4+salt of M3
 
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