Question

Assertion :Electronegativity is not a measurable quantity. Reason: The electronegativity of any given element is not constant, it varies depending on the element to which it bound.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Electronegativity of an atom is defined as the tendency to pull the shared pair of electrons in bonded atoms.

It is a relative measurement and for any given element, the value of electronegativity is not constant, it varies depending on the element to which it bound.

For example: In $H_{2}O$, since $O$ has a higher electron affinity, it has negative oxidation state (-2) and $H$ has +1 oxidation state. While in $NaH$, $Na$ being metal has the least affinity for electron and thus $H$ has an oxidation state of -1 and $Na$ as +1.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion