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99 Percentile Qs Bank for JEE MainChemistrySome Basic Concepts of Chemistry

The emperical formula of a compound is C ₂ H ₅ O and its vapour density is 45 . What is the molecular formula of the compound?

Options

  1. AC ₂ H ₅ O
  2. BC ₆ H ₁₃ O ₃
  3. CC ₄ H ₁₀ O ₂
  4. DC ₆ H ₁₅ O ₃

Correct answer

C. C ₄ H ₁₀ O ₂

Step-by-step solution

Given, empirical formula of compound = C ₂ H ₅ O Vapour density =45 Molecular formula = ? Empirical formulas show the simplest whole number ratio of atoms in a compound. Molecular formula show the number of each type of atom in a molecule. Relation between empirical formula and molecular formula. Molecular formula =n (empirical formula )n= MM (molar mass) EFM (empirical formula molar mass) Molecular weight =2 vapour density =2 45=90 Let, the molecular forumula be C _ 2 x H _ 5 x O _x . Therefore, n= 90 (molecular w

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