Consider the following ionization enthalpies of two elements 'A' and 'B'.
| Element | 1 (kJ/mol) | 2 (kJ/mol) | 3 (kJ/mol) |
|---|---|---|---|
| A | 899 | 1757 | 14847 |
| B | 737 | 1450 | 7731 |
Which of the following statements is correct ?
← JEE Main 2017 · 8 Apr · Shift 1
ChemistrySingle correct+4 / -1Question 46 of 90
JEE Main 2017 · 8 Apr · Shift 1, Chemistry question 46
Answer and worked solution
Official answer: C
The large jump comes after the second ionisation for both, so both are group 2. A (899) has the higher first ionisation enthalpy, so it is above B: A is Be and B is Mg.