TS EAMCET · Chemistry · Classification of Elements and Periodicity in Properties
The successive ionisation energy values for an element ' \(X\) ' are given below : (i) lst ionisation energy \(=410 \mathrm{~kJ} \mathrm{~mol}^{-1}\) (ii) \(2 \mathrm{nd}\) ionisation energy \(=820 \mathrm{~kJ} \mathrm{~mol}^{-1}\) iii) \(3 \mathrm{rd}\) ionisation energy \(=1100 \mathrm{~kJ} \mathrm{~mol}^{-1}\) (iv) 4 th ionisation energy \(=1500 \mathrm{~kJ} \mathrm{~mol}^{-1}\) (v) 5 th ionisation energy \(=3200 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
- A 5
- B 4
- C 2
- D 3
Answer & Solution
Correct Answer
(B) 4
Step-by-step Solution
Detailed explanation
Maximum difference is between the fifth and fourth ionisation energy. (Removal of the 5 th electron requires almost more than double the energy required to remove the 4th electron.) This implies that the first four electrons are removed from the valence shell. Hence, number of…
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