AIIMS 2018 Chemistry p-block Elements MCQ Question
First three ionisation energies (in ) of three representative elements are given below:
| Element | |||
|---|---|---|---|
| P | 495.8 | 4562 | 6910 |
| Q | 737.7 | 1451 | 7733 |
| R | 577.5 | 1817 | 2745 |
Then incorrect option is:
Q: Alkaline earth metal
P: Alkali metals
R: s-block element
They belong to same period
Correct Answer
Detailed Explanation
The element R is a p-block element, and the relatively small difference between the second ionization energy (IE₂) and the third ionization energy (IE₃) indicates that it can lose more than two electrons relatively easily, suggesting that its stable oxidation state is higher than +2. This behavior is characteristic of elements that can achieve a stable electronic configuration by losing additional electrons, often leading to oxidation states of +3 or higher. The other options are not applicable as they do not provide relevant information or alternatives regarding the oxidation states of p-block elements.
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