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Q.

The single displacement reaction among the following reactions is-

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a

Zn + 2HCl → ZnCl2 + H2

b

2H2O → 2H2 + O2

c

HNO3 → N2O3 + H2O

d

AgNO3 + NaCl → AgCl + NaNO3

answer is B.

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Detailed Solution

In a single displacement reaction, a more reactive element displaces a less reactive element from its aqueous salt solution.

This reaction is represented as-
Zn + 2HCl → ZnCl2 + H2

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