Home Chemistry Classification of Elements and Periodicity Ionisation Energy First and second ionisation enthalpies (in k…
Chemistry Classification of Elements and Periodicity Ionisation Energy Single Correct MCQ
Published on: August 14, 2026

First and second ionisation enthalpies (in kJ/mol) of few elements are given below.

Element

 

(i)

520

7300

(ii)

900

1760

(iii)

1680

3380

(iv)

2082

3963

Which of the above elements will form halides with formula ?

A
(i) and (ii)
B
(i) and (iii)
C
(ii) and (iii)
D
(i) and (iv)

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Text Solution

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The correct answer is:
C

(ii) is a reactive metal from second group, and (iii) is a reactive non – metal from 17 th group. For second group elements, the difference in successive IE is less. The compound formed will be .

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