Question:

The empirical formula of an organic compound containing carbon and hydrogen is $CH_2$. The mass of one litre of this organic gas is exactly equal to that of one litre of $N_2$. Therefore, the molecular formula of the organic gas is

Updated On: Jun 23, 2023
  • $C_2H_4$
  • $C_3H_6$
  • $C_6H_{12}$
  • $C_4H_8$
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The Correct Option is A

Solution and Explanation

Mass of 1 L of gas = mass of 1 L of $N_2$ according to Avogadro?? hypothesis. Molecular masses will also be equal, then molecular mass of the $gas = 28$. Hence formula is $C_2H_4 (2 ? 12 + 4 ? 1 = 28)$.
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Top Questions on Organic Chemistry - Some Basic Principles and Techniques

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Concepts Used:

Organic Chemistry - Some Basic Principles and Techniques

Organic Chemistry is a subset of chemistry dealing with compounds of carbon. Therefore, we can say that Organic chemistry is the chemistry of carbon compounds and is 200-225 years old. Carbon forms bond with itself to form long chains of hydrocarbons, e.g.CH4, methane and CH3-CH3 ethane. Carbon has the ability to form carbon-carbon bonds quite elaborately. Polymers like polyethylene is a linear chain where hundreds of CH2 are linked together. 

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Importance of Organic Chemistry:

Organic chemistry is applicable in a variety of areas including-

  • Medicines: Example- Aspirin which is a headache medicine and Ibuprofen is a painkiller, both are organic compounds. Other examples include paracetamol.
  • Food: Example- Starch which is a carbohydrate is an organic compound and a constituent of rice and other grains. It is the source of energy.
  • Clothing: Example- Nylon, Polyester and Cotton are forms of organic compounds.
  • Fuels: Examples- Gasoline, Petrol and Diesel are organic compounds used in the automobile industry at large.