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NDA 2021 GAT · General Knowledge · Mole Concept and States of Matter · hard

The number of moles present in 11 g of carbon dioxide (C = 12, O = 16) is

Single correct option

The number of moles present in 11 g of carbon dioxide (C = 12, O = 16) is
  1. A. 0.5
  2. B. 0.25
  3. C. 1.0
  4. D. 4.0
Show answer and solution

Answer: (B) 0.25

The molar mass of CO2 is 12 + 32 = 44 g/mol. Moles = 11/44 = 0.25. Answer 0.5 corresponds to 22 g, and 1.0 to 44 g. Option 4.0 comes from inverting the ratio, a frequent calculation slip.
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Original question written in the NDA 2021 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake