Give reason
(a) C and Si are always tetravalent but Ge, Sn, and Pb show divalency.
(b) Gallium has higher ionization enthalpy than Al.Explain.
Answered Feb 05, 2023
(a) Ge, Sn and Pb show divalency due to inert pair effect, Pb2+is more stable than Pb4+.
(b) Due to poor shielding effect of d-electrons in Ga, effective nuclear charge increases as compared to Al. Thus the I.E of Ga is higher than Al.
(c) Assertion is correct, reason is incorrect
The electronic configurations of Na and Mg are: Na:1s2 2s2 2p6 3s1 And Mg: 1s2 2s2 2p6 3s2 thus, the first electron in both the cases has to be removed...
+1 and +3 ,due to inert pair effect.
due to inert pair effect
(b) Q > S, P > Q, R > Q Age: As, Q > S, P > Q, R > Q Also, P is the oldest. ∴ P > R > Q >...
(b) Correct explanation: in Al, 3p electron is to be removed while in Mg, a 3s electron is to be removed .
(B) If both assertion and reason are true, but reason is not the true explanation of the assertion.
(a) Boron elements show oxidation state of +3 only
The correct answer is (C) Raghu
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