1.

Which of trhe following statements is not correct?

Answer»

The first inoisation energies (in ` KJ "mol"^(-1)`) of carbon, silicon , GERMANIUM , tin, and lead are 1086, 786,761,708 and 715 respectively:Down the GROUP , electronegativity dereases from B to T1 in boron FAMILY.
Among oxides of the elements of carbon family CO is NEUTRAL , GeO is acidic and SnO is amphoteric.
The 4f and 5f INNER transition elements are placed seperately at the bottom of the periodic table to maintain its struction.

Answer :A::C::D


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