Home
Class 11
CHEMISTRY
Assertion (A) : EA of O is less than tha...

Assertion (A) : `EA` of `O` is less than that of `F` but greater than that of `N`.
Reason (R ): `IE` is as follows: `N gt O gt F`.

A

If both Assertion (A) and (R ) are correct and Reason (R ) is the correct explanation of Assertion (A).

B

If both (A) and (R ) are correct but (R ) is not the correct explanation for (A).

C

If (A) is correct but (R ) is not correct.

D

If (A) and (R ) are correct

Text Solution

Verified by Experts

The correct Answer is:
C
Correct reason: `EA` of `N` is essentially zero because of its half-filled electronic configuration.
`F(2s^(2)2p^(5)) + e^(-) rarr F^(ɵ) (2s^(2) 2p^(6))`
(More stable configuration)
`O(2s^(2)2p^(4)) + e^(-) rarr O^(ɵ) (2s^(2),2p^(5))`
(Less stable configuartion than that of `F^(ɵ))`
Hence `EA_(1)` of `F gt EA_(1)` of `O`
Thereforte `EA` order is `Fgt O gtt N` .
Promotional Banner

Topper's Solved these Questions

  • PERIODIC CLASSIFICATION OF ELEMENTS AND GENERAL INORGANIC CHEMISTRY

    CENGAGE CHEMISTRY|Exercise Exercises (Integer)|13 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS AND GENERAL INORGANIC CHEMISTRY

    CENGAGE CHEMISTRY|Exercise Exercises (Fill In The Blanks)|20 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS AND GENERAL INORGANIC CHEMISTRY

    CENGAGE CHEMISTRY|Exercise Exercises (Single Correct)Miscellaneous|10 Videos

  • P-BLOCK GROUP 14 - CARBON FAMILY

    CENGAGE CHEMISTRY|Exercise Exercises Archives (Subjective)|9 Videos

  • PURIFICATION OF ORGANIC COMPOUNDS AND QUALITATIVE AND QUANTITATIVE ANALYSIS

    CENGAGE CHEMISTRY|Exercise Assertion Reasoning Type|5 Videos

Similar Questions

Explore conceptually related problems

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 .

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:

Assertion (A) : The first IE of Be is greater than that of B Reason (R ) : 2p orbitals is lower in energy than 2s

The IE_(1) of Be is greater than that of B. [T/F]

Assertion(A) : IE_(2) of C is greater than that of B . Reason (R ): Due to penetration effect.

Assertion (A): The second ionisation energy of 'O' is greater than that of 'N' Assertion (R): The half flled p-orbitals cause greater stability.

Assertion (A) : The ionisation energy of N is more than that of O Reason (R ) : Electronic configuration of N is more stable due to half - fillied 2p orbitals

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