Assertion. The first ionization enthalpy of aluminium is lower than that magnesium. Bissoy Answers

Assertion : N2 is less reactive than P4. Reason : Nitrogen has more electron gain enthalpy than phosphorus

(c) Assertion is correct, reason is incorrect

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Among the elements of the 3rd period from Na to Ar, pick out the element: (a). with highest first ionization enthalpy

(a). Ar has highest first ionization enthalpy.

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How would you explain the fact that the first ionization of Na is lower than that of Mg but its second ionization enthalpy is higher than that of Mg?

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...

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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.

(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...

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ASSERTION (A): Generally, ionization enthalpy increases from left to right in a period.

(b) Reason is correct explanation for assertion.

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ASSERTION (A): Boron has a smaller first ionization enthalpy then beryllium.

(c)Reason is correct explanation for assertion

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Statement 1: Of all the elements, helium has the highest value of first ionization enthalpy.

(c) Correct Statement :Helium is the smallest inert gas.

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Assertion. The first ionization enthalpy of aluminium is lower than that magnesium.

(b) Correct explanation: in Al, 3p electron is to be removed while in Mg, a 3s electron is to be removed .