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Which of the following has the highest r...

Which of the following has the highest reactivity towards water?

A

Na

B

Rb

C

Li

D

K

Text Solution

Verified by Experts

The correct Answer is:
B
The reaction of alkali metals with water became increasig violent on descending the group on accordance their decreasing ionisation energies with increasing size. So, the orther of reactivity is:
`Lilt Nalt Klt Rb`.
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