MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
Which is a positive radical?
Think it through first, then pick an option.
- a Phosphate
- b Carbonate
- c Phosphonium
- d Nitrate
Answer and explanation
Correct answer: c Phosphonium
Phosphonium, PH₄⁺, has charge +1, so it is a positive radical. Ammonium is the other one.
Why the other options are wrong
- a Phosphate: Phosphate, PO₄³⁻, has charge −3; it is a negative radical.
- b Carbonate: Carbonate, CO₃²⁻, has charge −2; it is a negative radical.
- d Nitrate: Nitrate, NO₃⁻, has charge −1; it is not positive.
More board questions on this topic
- Which of these is a positive radical?
- Which radical has valency 1?
- Which radical is trivalent?
- What is the valency of the phosphate radical?
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