BPSC – Combined Competitive Examination · Question 139
Which of the following pairs will give a displacement reaction?
Show answer & explanation
Answer: (A) AgNO₃ solution and copper metal
Explanation
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag: a more reactive metal displaces a less reactive one.
- (A) Correct
Correct: copper is more reactive than silver and displaces it.
- (B) Incorrect
Wrong: copper cannot displace sodium.
- (C) Incorrect
Wrong: silver is less reactive than iron.
- (D) Incorrect
Wrong: aluminium is less reactive than magnesium.