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Hydrogen evolved at NTP on complete reaction of 27 gm of Al with excess of aq NaOH would be (Chemical reaction: 2Al + 2NaOH + \(\mathrm{H_2O}\) \(\mat...

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Mole conceptSTP/NTP & percent calculations, empirical formula, minimum molecular mass, vapour densityEASYJEE Chemistry
Hydrogen evolved at NTP on complete reaction of 27 gm of Al with excess of aq NaOH would be (Chemical reaction: 2Al + 2NaOH + \(\mathrm{H_2O}\) \(\mathrm{NaAlO_2}\) + \(\mathrm{H_2}\) **Options:** - **A.** [object Object] - **B.** [object Object] - **C.** [object Object] - **D.** [object Object] --- **Difficulty:** EASY | **Chapter:** Mole concept | **Topic:** STP/NTP & percent calculations, empirical formula, minimum molecular mass, vapour density

Official Solution

## ✅ Correct Answer: **D** ### 📖 Detailed Explanation: This question uses gaseous state & mole concept, volumetric analysis & stoichiometry. Write the balanced chemical equation, compute moles of each reactant, identify the limiting reagent, and use stoichiometric ratios (and % yield, if needed) to obtain the answer; this gives option D. --- *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 conceptSTP/NTP & percent calculations, empirical formula, minimum molecular mass, vapour densityEASYJEE Chemistry