Questions
Which of the following trend followed by electronegativity down the group?
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Correct option is C
Down the group-l3, electronegativity decreases from B to Al and then increases marginally. This is because the size increases ,yet the effective nuclear charge increases because of the poor shielding of d - and f- electrons.as a result, force of attraction of the nucleus for the electrons increases and hence the electronegativity increases from Al to Tl.Similar Questions
The bond dissociation energy of BF bond in BF3 is 646 kJ mol–1 whereas that of CF in CF4 is 315 kJ mol–1. The correct reason for higher BF bond dissociation energy as compared to that of CF bond is :
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