• # question_answer 84) Methane is quite stable whereas silane is unstable? Because- A) C ? C bond energy is large greater than Si ? Si bond energyB) Si ? H bond energy is much lower than C ? H bond energyC) Si has vacant p orbitals which are more susceptible for nucleophilic attackD) All of above reasons

Correct Answer: B

Solution :

Si ? H bond energy is 393 kJ/mol Whereas C ? H bond energy is 435 kJ/mol $Dc-c\simeq \,\,340\,\,kJ/mol\And {{D}_{Si}}{{-}_{Si}}\,=\,\,368\,\,kJ/mol$ C ? C and Si ? Si bond energies are comparable

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