Question:
An organic compound contains $69\%$ carbon and $4.8\%$ hydrogen, the remainder being oxygen. What will be the masses of carbon dioxide and water produced when $0.20 \,g$ of this substance is subjected to complete combustion.
An organic compound contains $69\%$ carbon and $4.8\%$ hydrogen, the remainder being oxygen. What will be the masses of carbon dioxide and water produced when $0.20 \,g$ of this substance is subjected to complete combustion.
Updated On: Jun 23, 2023
- $0.69 \,g$ and $0.048\, g$
- $0.506 \,g$ and $0.086\, g$
- $0.345 \,g$ and $0.024 \,g$
- $0.91\, g$ and $0.72 \,g$
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The Correct Option is B
Solution and Explanation
$\% C=\frac{12}{44}\times\frac{\text{mass of $CO_{2}$ formed}}{\text{mass of substance taken}}\times100$
$69=\frac{12}{44}\times\frac{\text{Mass of $CO_{2}$ formed}}{0.2}\times100$
$\therefore$ Mass of $CO_{2}$ formed $=\frac{69\times44\times0.2}{12\times100}=0.506\, g$
$\% H=\frac{2}{18}\times\frac{\text{mass of $H_{2}O$ formed}}{\text{mass of substance taken}}\times100$
$4.8=\frac{2}{18}\times\frac{x}{0.2}\times100$
$x=\frac{4.8\times18\times0.1}{100}$
$=0.086\,g$
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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.
Read Also: Organic Compounds
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.