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Which of the following is a polar molecule? (a) Ammonia (NH3) (b) Methane (CH4) (c) Ethylene (C2H4) (d) Carbon Tetrachloride (CCl4)
Answer: (A)
Explanation: A polar molecule is a chemical species in which the electron distribution between covalently bound atoms is not uniform.
Ammonia is a covalent polar molecule. When the common pair of electrons between the two atoms is not at the same distance, polar covalent bonds form, resulting in fractional positive and negative charge formation.
