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(a) Why does R3P = O exist but R3 N = O does not? (R = alkyl group)(b) Why is dioxygen a gas but sulphur a solid?(c) Why ate halogens coloured? |
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Answer» (a) Due to absence of d- orbital,nitrogen cannot ex-pand its valency beyond there. (b) Because of pπ- pπ multiple bonding in dioxy-gen which is absent in sulphur.Due to small size and high elctrogegativity oxygen acts as diatomic molecular held by weak van der waals' forces S Because of big siz and lower electonegativity form S-S single bonds. (c) Due to excitation of electron by absorption of rediation from visible region. |
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