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Pure Substances and Mixtures - Class VIII
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In which of the following compounds resonance does not occur
(i) ${H _2}O$
(ii) $Si{O _2}$
(iii) $S{O _3}$
(iv) $C{O _2}$
AnswerClick to flip back
A
Both (i) and (ii)
💡 Explanation:
Resonance involves delocalization of pi electrons through conjugated systems or empty d-orbitals where applicable. H2O has only single bonds and lone pairs, so no resonance occurs. SiO2 exists as a giant covalent network of silicon-oxygen single bonds without resonance structures. Thus, both (i) and (ii) do not exhibit resonance.