Question

Which is\are false about electronegativity order of the following elements ?

• A. $P>Si$
• B. $C>N$
• C. $C>Br$
• D. $Se>Ca$

Answer 1

Answer: (B), (C), (D)

The correct options are
B $C>N$
C $C>Br$
D $Se>Ca$

In a period from left to right, the electronegativity values increases, as size decreases and nuclear charge increases.
A. $P>Si$ is wrong option because $P$ and $Si$ are 5th and 4th group of 3rd period elements. So in period left to right E.N should be increased but here it is decreased.

B. $C>N$ is false because carbon lies before the nitrogen (left to right).

C. $C>Br$ is false because carbon lies before the bromine (left to right).

D. $Ca<Se$ is false because $Ca$ lies before the $Se$(left to right).

Hence options B,C & D are correct options.