1. Three canonical forms can be drawn for CO₃²⁻ ion. 2. Three resonance structures can be drawn for ozone. 3. BF₃ has non-zero dipole moment. 4. Dipole moment of NF₃ is greater than that of NH₃ .

Answer: 1. Three canonical forms can be drawn for CO₃²⁻ ion. Key idea: check each statement. mathrmCO₃²⁻ : three equivalent canonical forms. True. Ozone has two resonance structures, not three. BF₃ is planar symmetric, so dipole moment is zero. NF₃ : N-F bond dipoles oppose the lone-pair dipole, so μ is much smaller than for NH₃ . Option 1.

Topic: Valence bond theory, hybridization (s, p, d), resonance· Chemical Bonding and Molecular Structure

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1. Three canonical forms can be drawn for \(CO_3^{2-}\) ion.

2. Three resonance structures can be drawn for ozone.

3. \(BF_3\) has non-zero dipole moment.

4. Dipole moment of \(NF_3\) is greater than that of \(NH_3\).

Doubtly Asked 30 Oct 2026 NEET UG 2024 Practice test neet Save WhatsApp Report

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Answer: 1. Three canonical forms can be drawn for \(CO_3^{2-}\) ion.

Key idea: check each statement.

\(\mathrm{CO_3^{2-}}\): three equivalent canonical forms. True.
Ozone has two resonance structures, not three.
\(\mathrm{BF_3}\) is planar symmetric, so dipole moment is zero.
\(\mathrm{NF_3}\): N-F bond dipoles oppose the lone-pair dipole, so \(\mu\) is much smaller than for \(\mathrm{NH_3}\).

Option 1.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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