Question

The process requiring absorption of energy is :
(1) N - >N-
(2) F ->F-
(3) Cl -> Cl-
(4) H ->H-​

Answer 1

Answer:

nswer: Option (c) is the correct answer.

Explanation:

It is known that atomic number of fluorine is 9 and in order to completely fill its octet it readily accepts one electron from a donor atom. Hence, it will not absorb much energy.

Similarly, chlorine will readily accept an electron as it also has valency 7. Hence, it will also not absorb much energy.

Hydrogen atom has only one electron in its ground state. Hence, in order to complete its octet it will also accept one electron from a donor atom. Hence, not much energy is absorbed to accept an electron by hydrogen atom.

Oxygen has six valence electrons. So, when it gains just one electron then it will acquire a negative charge. But when another electron is being added to it then there occurs repulsion due to the -1 charge on O^{-}O

−

ion and negative charge of electron that tries to enter into the oxygen ion.

As a result, high energy has to be provided and thus, O^{2-}O

2−

will be formed by absorption of energy.

Thus, we can conclude that the process requiring the absorption of energy is O gives O^{2-}O

2−