Properties of H2O, NH3 and CH4 | JEE Main PYQ | Chemical Bonding
Which of the following statement is true with respect to H2O, NH3 and CH4 ?
(A) The central atoms of all the molecules are sp3 hybridized.
(B) The H–O–H, H–N–H and H–C–H angles in the above molecules are 104.5°, 107.5° and 109.5°, respectively.
(C) The increasing order of dipole moment is CH4 < NH3 < H2O.
(D) Both H2O and NH3 are Lewis acids and CH4 is a Lewis base.
(E) A solution of NH3 in H2O is basic. In this solution NH3 and H2O act as Lowry–Bronsted acid and base respectively.

Correct Answer: A, B and C only

Explanation

In H2O, NH3 and CH4, the central atom is sp3 hybridized. Bond angles decrease due to lone pair–lone pair and lone pair–bond pair repulsions.

CH4 is non-polar, NH3 is polar and H2O has the highest dipole moment.

NH3 acts as a Bronsted base and H2O acts as a Bronsted acid, hence statement (E) is incorrect.

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Updated for JEE Main 2026: This PYQ is important for JEE Mains, JEE Advanced and other competitive exams. Practice more questions from this chapter.

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