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Question
Match the correct ionisation enthalpies and electron gain enthalpies of the following elements.
| Elements | ∆H1 | ∆H2 | ∆egH | |
| (i) Most reactive non-metal | A. | 419 | 3051 | – 48 |
| (ii) Most reactive metal | B. | 1681 | 3374 | – 328 |
| (iii) Least reactive element e | C. | 738 | 1451 | – 40 |
| (iv) Metal forming binary halide | D. | 2372 | 5251 | + 48 |
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Solution
| Elements | ∆H1 | ∆H2 | ∆egH | |
| (i) Most reactive non-metal | B. | 1681 | 3374 | – 328 |
| (ii) Most reactive metal | A. | 419 | 3051 | – 48 |
| (iii) Least reactive element e | D. | 2372 | 5251 | + 48 |
| (iv) Metal forming binary halide | C. | 738 | 1451 | – 40 |
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