alleryStart learning →Which radical has valency +1?
APhosphate, PO4 3-
BCarbonate, CO3 2-
CSulphate, SO4 2-
DAmmonium, NH4 +
Answer & Solution
Correct answer: D. Ammonium, NH4 +
1. The chapter lists radical valencies.
2. Carbonate, sulphate and phosphate carry charges 2, 2 and 3.
3. Ammonium is NH4 +, a monovalent positive radical.
4. So option A is correct.
_Source: Selina Concise Chemistry Class 9, Ch 4 The Language of Chemistry (Mistral OCR'd PDF), section on radicals_
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