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Chemistry · PYQ NEET UG 2025
हिन्दीAmong the following, choose the ones with equal number of atoms. A. \( 212\text{ g} \) of \( \text{Na}_2\text{CO}_3\text{ (s)} \) [molar mass = \( 106\text{ g} \)] B. \( 248\text{ g} \) of \( \text{Na}_2\text{O (s)} \) [molar mass = \( 62\text{ g} \)] C. \( 240\text{ g} \) of \( \text{NaOH (s)} \) [molar mass = \( 40\text{ g} \)] D. \( 12\text{ g} \) of \( \text{H}_2\text{ (g)} \) [molar mass = \( 2\text{ g} \)]\nE. \( 220\text{ g} \) of \( \text{CO}_2\text{(g)} \) [molar mass = \( 44\text{ g} \)] Choose the correct answer from the options given below :
Correct answer · Option 2
A, B, and D only
Explanation
Calculate total atoms = moles × N_A × atomicity. A: 2 × 6 = 12 moles of atoms. B: 4 × 3 = 12 moles of atoms. C: 6 × 3 = 18 moles of atoms. D: 6 × 2 = 12 moles of atoms. E: 5 × 3 = 15 moles of atoms. Thus A, B, and D have equal atoms.
