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Q.

Which of the following metals will lose an electron first?

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a

Zn

b

Li

c

K

d

Cu

answer is B.

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Detailed Solution

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  • Potassium (K) very easily loses an electron for the formation of a cation. 
  • As the reactivity series goes from low to high, the ability of the metal to lose an electron increases. 
  • Because among the given metals, K is at the highest position in the series, K will first lose an electron.
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