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Reactivity with Air CO2 and Water (Group 1)

Which of the ...

Question

Which of the following element(s) is/are not react directly with nitrogen to form nitride ?

A

Na

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B

Li

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C

K

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D

Rb

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Solution

The correct options are
B Na
C K
D Rb
Among all alkaline earth metals only lithium directly react with nitrogen to form nitride due to its small size and high electronegativity(anamalous behaviour of Li).
$6 L i + N_{2} \to 2 L i_{3} N$ .
Hence options A,C & D are correct.

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