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The frequency of the radiation emitted b...

The frequency of the radiation emitted by alkali metals in the flame test follows the other

A

Li gt Na gt K gtCS

B

Ligt K gt Na gt CS

C

K gt Na gt Li gt Cs

D

K gt Cs gt Na gt Li

Text Solution

Verified by Experts

The correct Answer is:
D
Alkali metals have very low ionisation energy . So, it willl be very easy to eject an electron. Electron are ejected from the surface of the metal when a radiation of suitable frequency is used in photoelectric effect .
Therefore , correct order of absorb frequency is K > Cs > Na > Li
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