In which of the following pairs of molecules/ions, the central atoms have

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In which of the following pairs of molecules/ions, the central atoms have sp²-hybridisation?

Options

(a) NO₂⁻ and NH₃
(b) BF₃ and NO₂⁻
(c) NH₂⁻ and H₂O
(d) BF₃ and NH₂⁻

Correct Answer:

BF₃ and NO₂⁻

Explanation:

For sp² -hybridisation, there must be 3 σ bonds or 2 σ bonds along with a lone pair of elctrns.
NO₂⁻ ⇒ 2σ + 1/p = 3 i.e.,sp² -hybridisation
NH₃ ⇒ 3σ + 1/p = 4 i.e.,sp³ -hybridisation
BF₃ ⇒ 3σ + 0/p = 3 i.e.,sp² -hybridisation
NH₂⁻ ⇒ 2σ + 2/p = 4 i.e.,sp³ -hybridisation
H₂O ⇒ 2σ + 2/p = 4 i.e.,sp³ -hybridisation
Thus, among the given pairs, only BF₃ and NO₂⁻ have sp² -hybridisation

Related Questions:

1. The reaction between an alkyl halide and an alkoxide ion to give an ether is
2. Which one of the following pairs represents stereoisomerism
3. Which of the following is the weakest bond
4. Which statement is correct
5. 8.2 L of an ideal gas weight 9.0 gm at 300 K and 1 atm pressure

Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Chemical Bonding and Molecular Structure (86)
Subject: Chemistry (2512)

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