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{:(,"Column I",,"Column II",),((A),Li^(+...

`{:(,"Column I",,"Column II",),((A),Li^(+) (g) lt Be^(+2) (g),(P),1^(st) "ionisation energy",),((B),Li^(+) (g) lt Be^(+2)(g),(Q), "Temdemcy to gain an electron",),((C ),O(g) gt P(g) ,(R ),"Electronegativity",),(,,(S),"Effective nuclear charge value",):}`

Text Solution

Verified by Experts

The correct Answer is:
(A) = PS, (B) = PQRS, (C ) = PQR
(A) `H rarr He, Z_("eff") uarr IE uarr`
(B) `underset(1s^(2))li^(+)(g) lt underset(2s^(2))(Be^(+2))` all propertis greater due to more charge density
(C ) `Z_("eff")` of `P(g) gt O(g)`
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