Which of the following has a greater affinity for oxygen:
Correct answer: C. K
- A. B
- B. Na
- C. K
- D. Mg
Explanation
Boron (B) is more electronegative compared to the other elements listed (Na, K, and Mg). This means that it has a greater tendency to attract and bond with oxygen. Therefore, option a is correct.
This question appeared on the KMU Centralized Admission Test 2022 paper, which you can sit online with every answer explained.
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About Reactions of Group I Elements
Group I elements have one valence electron, so their reactivity increases down the group as ionisation energy decreases. Their reactions with water, oxygen, hydrogen and halogens produce hydroxides, oxides, hydrides and halides, while the behaviour of lithium differs from the heavier metals because of its small ionic size.
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