Questions
Which of the following graph represents the order among the melting points of IIIA group elements
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Correct option is B
→ The melting point of Boron is very high because of its gaint covalent polymeric structure.→The low melting point of Gallium is due to Gallium consistsof discrete diatomic molcules which are held by weak Vander waals forces of attractions.Melting point order: B > Al >Tl >In > Ga.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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