Class 10 Exam > Class 10 Notes > Extra Documents, Videos & Tests for Class 10 > Solutions of Carbon And Its Compounds (Page No - 267) - Chemistry Lakhmir Singh, Class 10
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Question 73:
An organic compound A (molecular formula C2H402) reacts with Na metal to form a compound B and evolves a gas which burns with a pop sound. Compound A on treatment with an alcohol C in the presence of a little of concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula C3H602). Compound D on treatment with NaOH solution gives back B and C. Identify A, B, C and D.
Solution :
A is ethanoic acid, CH3COOH
B is sodium ethanoate, CH3COONa
C is methanol, CH3OH
D is methyl ethanoate, CH3COOCH3
Question 74:
Which of the following hydrocarbons can decolourise bromine water and which cannot ? Why ?
C6H12, C6H14, C6H10
Solution :
C6H12 and C6H10 c an decolourise bromine water since these are unsaturated hydrocabons.
C6H14 cannot decolourise bromine water since it is a saturated hydrocarbon.
Question 75:
A four carbon atoms containing neutral organic compound X reacts with sodium metal to evolve a gas which burns with a ‘pop’ sound. Another four carbon atoms containing carbon compound reacts with sodium hydrogencarbonate to evolve a gas which turns lime water milky. When compounds X and Y are heated together in the presence of a little of concentrated sulphuric acid, then a new compound Z is formed.
(a) What is compound X ? Also write its formula.
(b) What is compound Y ? Also write its formula,.
(c) What is compound Z ? Also write its formula.
(d) What type of smell is given by compound Z ?
(e) What is the general name of compounds like Z ?
(f) What is the general name of the reaction which takes place between X and Y to form Z ?
Solution :
(a) X is butanol, C4H9OH
(b) Y is butanoic acid, C3H7COOH
(c) Z is butyl butanoate, C3H7COOC4H9
(d) Sweet smell is given by the compound Z.
(e) Esters
(f) Esterification reaction.
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FAQs on Solutions of Carbon And Its Compounds (Page No - 267) - Chemistry Lakhmir Singh, Class 10 - Extra Documents, Videos & Tests for Class 10
| 1. What are some examples of carbon compounds? |  |
Ans. Some examples of carbon compounds include methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), and benzene (C6H6).
| 2. Why is carbon considered the basis of organic chemistry? | |
Ans. Carbon is considered the basis of organic chemistry because it can form covalent bonds with other carbon atoms and a wide variety of other elements. This ability to form strong bonds allows carbon to create complex and diverse organic compounds.
| 3. What is the difference between saturated and unsaturated carbon compounds? | |
Ans. Saturated carbon compounds are those that contain only single bonds between carbon atoms, while unsaturated carbon compounds contain at least one double or triple bond between carbon atoms. Saturated compounds are typically more stable, while unsaturated compounds are more reactive.
| 4. How do carbon compounds contribute to environmental pollution? | |
Ans. Carbon compounds, such as hydrocarbons, can contribute to environmental pollution through the process of combustion. When these compounds are burned, they release carbon dioxide (CO2), a greenhouse gas that contributes to global warming. Additionally, the incomplete combustion of carbon compounds can release harmful pollutants, such as carbon monoxide (CO) and nitrogen oxides (NOx).
| 5. How are carbon compounds used in everyday life? | |
Ans. Carbon compounds are used in various aspects of everyday life. Some common uses include:
- Fuels: Carbon compounds are used as fuels for heating, cooking, and transportation.
- Pharmaceuticals: Many medicines and drugs are carbon-based compounds.
- Plastics and polymers: Carbon compounds are used to make various types of plastics and polymers.
- Food and beverages: Carbon compounds are essential components of carbohydrates, proteins, and fats found in food and beverages.
- Clothing and textiles: Carbon compounds are used in the production of synthetic fibers, such as nylon and polyester.
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