Question

covalent character is maximum in

(a)NaF (b)Na2O (c)Na3N (d)all have coavalent character

Answer 1

Answer:C

Explanation:

Na3N has the maximum covalent character because valency of N is three. Therefore it has the maximum covalency

Answer 2

Answer:

(c) Maximum covalent character is found in Na3N .

Explanation :-

Given compounds are :- NaF , Na2O , Na3N .

To find :- which compound has the maximum covalent bond character .

Theory :-

By knowing the difference between the electronegativity of the elements in the compound we can estimate the nature of bond .

when the difference is < 2 then , we say that covalent character exist .

Let's find out the difference in the electronegativities of the compound .

Electronegativity of the elements are as follows :-

Na :- 0.9

F :- 4

O :- 3.5

N :- 3

1. NaF :- $4-0.9 = 3.1$

2. Na2O :- $3.5 - 0.9 = 2.6$

3. Na3N :- $3 - 0.9 = 2.1$

From the above figures , we see that lowest difference of electronegativities exist in Na3N .

The order goes as , 2.1 < 2.6 < 3.1 i.e. Na3N < Na2O < NaF .

Fact used here is :- Lesser the difference in the electronegativities , more is the covalent character .

therefore , maximum covalent character is in Na3N  .

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