Verified Solution • 2025–26 Session moderate

QJEEM24Chbd55: JEE Main 2024 Chemistry - Class 11 JEEM24Chbd55 Solution: Given below are two statements : one is labelled as Assertion…

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : NH3 and NF3 molecule have pyramidal shape with a lone pair of electrons on nitrogen atom. The resultant dipole moment of NH3 is greater than that of NF3.

Reason (R) : In NH3, the orbital dipole due to lone pair is in the same direction as the resultant dipole moment of the N−H bonds. F is the most electronegative element.

In the light of the above statements, choose the correct answer from the options given below :

Multiple Choice Options

  • A (A) is false but (R) is true
  • B (A) is true but (R) is false
  • C Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
  • D Both (A) and (R) are true and (R) is the correct explanation of (A)

Step-by-Step Verified Solution

JEE Main 2024 (Online) 5th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 17 English Explanation

Dipole moment of NH3 is higher than NF3 as μ of lone-pair is in same direction as the resultant dipole moment of N−H bonds.

So, both (A) & (R) are true, & (R) is the correct explanation of (A)

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