AIIMS2019Chemistry-Chemical Bonding and Molecular Structure

AIIMS 2019 Chemistry Hybridization MCQ Question

Type: MCQ-conceptual-Medium-Class 11

In which of the following pair both the species have sp3sp^3 hybridization?

A

H2S, BF3\text{H}_2\text{S, BF}_3

B

SiF4, BeH2\text{SiF}_4\text{, BeH}_2

C

NF3, H2O\text{NF}_3\text{, H}_2\text{O}

D

NF3, BF3\text{NF}_3\text{, BF}_3

Correct Answer

Option C

Detailed Explanation

NF₃ (nitrogen trifluoride) and H₂O (water) both exhibit sp³ hybridization, but they have different molecular shapes due to the presence of lone pairs. NF₃ is trigonal pyramidal, while H₂O is bent, leading to distinct dipole moments. However, NF₃ is polar due to the electronegativity difference between N and F, while H₂O is also polar due to its bent shape and the significant dipole moment. Therefore, option C is incorrect; both molecules are polar, making option D the accurate choice. Options A and B are also incorrect as they suggest similarity in shape, which is not the case.

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