Chemistry - CHEMICAL BONDING Question with Solution | TestHub
Which of the following statement is true with respect to and ?
A. The central atoms of all the molecules are hybridized.
B. The and angles in the above molecules are 104.5 °, 107.5 ° and 109.5 °, respectively.
C. The increasing order of dipole moment is CH4 < .
D. Both and are Lewis acids and is a Lewis base.
E. A solution of in is basic. In this solution and act as Lowry-Bronsted acid and base respectively.
Choose the correct answer from the options given below:
Options:
Answer:
Solution:
Statement A is true: C, N, and O all have 4 steric pairs (bond pairs + lone pairs), meaning they are all sp³ hybridized.
Statement B is true: Increasing lone-pair repulsions contract the ideal angle down to in NH₃ (1 lone pair) and in H₂O (2 lone pairs).
Statement C is true: Symmetrical CH₄ has a net-zero dipole moment (), whereas H₂O has a larger dipole moment than NH₃ due to Oxygen's higher electronegativity.
Statements D & E are false: NH₃ and H₂O act as Lewis bases (not acids) due to lone pairs, and when mixed, NH₃ acts as the Brønsted base while H₂O acts as the acid.
