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प्रश्न
p – dichlorobenzene has a higher melting point than those of o – and m – dichlorobenzene.
उत्तर
p – dichlorobenzene has a higher melting point than those of o – and m – dichloro benzene. The higher melting point of p – isomer is due to its symmetry which leads to more close packing of its molecules in the crystal lattice and consequently strong intermolecular attractive force which requires more energy for melting. p – Dihalo benzene > o – Dichloro benzene> m – Dichioro benzene.
Melting point: 323 K 256 K 249 K
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संबंधित प्रश्न
Of the following compounds, which has the highest boiling point?
With respect to the position of – Cl in the compound CH3 – CH = CH – CH2 – Cl, it is classified as ______.
Match the compounds given in Column I with suitable items given in Column II.
| Column I (Compound) | Column II (Uses) |
||
| A | Iodoform | 1 | Fire extinguisher |
| B | Carbon tetra chloride | 2 | Insecticide |
| C | CFC | 3 | Antiseptic |
| D | DDT | 4 | Refrigerants |
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Ethyl acetate
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\[\ce{CH3 - CH2 - Br + NaSH ->[alcohol][H2O]}\]
