Question

How many among the following can easily displace copper metal in displacement reaction?
Potassium (K)
, Barium (Ba),
Calcium (Ca),
Aluminium (AI),
Silver (Ag),
Gold (Au),
Platinum(Pt),
Nickel (Ni),
Mercury (Hg)​

Answer 1

K
Al
Ba
Ca

These 4 are more reactive than copper

Answer 2

Answer:-

There are 5 easily displace copper metal in displacement reaction.