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When sodium and chlorine reacts then:
(1) Energy is released and ionic bond is formed
(2) Energy is released and a covalent bond is formed
(3) Energy is absorbed and ionic bond is formed
(4) Energy is absorbed and covalent bond is formed
Ans: Energy is released and a covalent bond is formed
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Which of the following is always a whole number : (1) Atomic weight (2) Atomic radii (3) Equivalent weight (4) Atomic number Ans: Atomic number
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Delocalisation of electrons in conjugated system is called resonance. For example there is delocalisation of electrons in benzene ,hence we write kekule structure for benzen.
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