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Assertion: magnitude of electron gain en...

Assertion: magnitude of electron gain enthalpy of oxygen is less than that of fluorine but greater than that of nitrogen.
Reason: Ionisation enthalpy order is as follows: `N gt O lt E`.

A

If both assertion and reason are true annd the reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but the reason is false

D

if assertion is false but the reason is true

Text Solution

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The correct Answer is:
B
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Electron gain enthalpy of fluorine is less than that of chlorine. Why?

Given below are two statements labelled as Assertion (A) and Reason (R) Assertion (A): Electron gain enthalpy of oxygen is less than that of Flourine but greater than Nitrogen. Reason (R): Ionisation enthalpies of the elements follow the order Nitrogen gt Oxygen gt Fluorine Select the most appropriate answer from the options given below:

Why is the electron gain enthalpy of O or F less than that of S or Cl?

" The electron gain enthalpy of "O" is less negative than that of "S" ."

Electron gain enthalpy is greater than zero for

The first ionization enthalpy of O is lower than that of N.

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