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If NA is Avogadro’s number, then the number of valence electrons in 4.2 g of nitride ion () is (Given One atom of N has 5 valence electrons)

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Mole conceptLaw of chemical combination, atomic & molecular mass, mole concept, calculationsEASYJEE Chemistry
If NA is Avogadro’s number, then the number of valence electrons in 4.2 g of nitride ion () is (Given One atom of N has 5 valence electrons) **Options:** - **A.** [object Object] - **B.** [object Object] - **C.** [object Object] - **D.** [object Object] --- **Difficulty:** EASY | **Chapter:** Mole concept | **Topic:** Law of chemical combination, atomic & molecular mass, mole concept, calculations

Official Solution

## ✅ Correct Answer: **A** ### 📖 Detailed Explanation: This question uses avogadro's number, atomic structure & atomic mass. Convert all given quantities into moles using n = given amount/molar mass, use Avogadro's number where needed to get particles, and then compare with the options; this matches option A. --- *This is an official solution provided by Chem Mantra. For more chemistry questions and solutions, explore our [question bank](/courses).*

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Mole conceptLaw of chemical combination, atomic & molecular mass, mole concept, calculationsEASYJEE Chemistry