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Which of the following statements are correct?
(a) Elements of group 15 form electron deficient hydrides.
(b) All elements of group 14 form electron precise hydrides.
(c) Electron precise hydrides have tetrahedral geometries.
(d) Electron rich hydrides can act as Lewis acids.

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B
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b) All elements of group 14 form electron precise hydrides
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I have 18 Years Experience in teaching ( Chemistry NEET,IIT Mains, IIT Foundation)

Answer is b and c i,e All elements of group 14 form electron precise hydrides. Electron precise hydrides have tetrahedral geometries. Eg: CH4 has tetrahedral geometry.
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