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Carbon & its Compounds - 1 - Class 10 MCQ


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15 Questions MCQ Test Science Class 10 - Carbon & its Compounds - 1

Carbon & its Compounds - 1 for Class 10 2024 is part of Science Class 10 preparation. The Carbon & its Compounds - 1 questions and answers have been prepared according to the Class 10 exam syllabus.The Carbon & its Compounds - 1 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Carbon & its Compounds - 1 below.
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Carbon & its Compounds - 1 - Question 1

What distinguishes synthetic detergents from traditional soaps in terms of their cleansing action?

Detailed Solution for Carbon & its Compounds - 1 - Question 1
One key distinction between synthetic detergents and traditional soaps is that synthetic detergents do not form scum in hard water. This property makes them more efficient for cleaning purposes in areas with hard water.
Carbon & its Compounds - 1 - Question 2

Why are modern synthetic detergents referred to as "soapless soaps"?

Detailed Solution for Carbon & its Compounds - 1 - Question 2
Modern synthetic detergents are termed "soapless soaps" because they do not contain traditional soap molecules. Instead, they utilize synthetic surface-active ingredients that are effective in various water conditions and do not form scum like traditional soaps.
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Carbon & its Compounds - 1 - Question 3

Which chemical reaction is commonly utilized as a test for ethanol due to the evolution of H2 gas with a distinctive sound?

Detailed Solution for Carbon & its Compounds - 1 - Question 3
The reaction of ethanol with sodium, producing hydrogen gas with a characteristic 'pop' sound, is a classic test for the presence of ethanol. This reaction is a simple yet effective way to identify the compound, showcasing its chemical properties in a distinctive manner.
Carbon & its Compounds - 1 - Question 4
At what temperature does ethanoic acid boil?
Detailed Solution for Carbon & its Compounds - 1 - Question 4
Ethanoic acid, also known as acetic acid, boils at 391 K. This high boiling point is a significant physical property of the compound and is crucial for various industrial and laboratory applications.
Carbon & its Compounds - 1 - Question 5
Why is pure acetic acid often referred to as "glacial acetic acid"?
Detailed Solution for Carbon & its Compounds - 1 - Question 5
Pure acetic acid is termed "glacial acetic acid" because when it is cooled sufficiently, it forms a solid that looks like ice. This phenomenon is intriguing and gives rise to the unique moniker "glacial," emphasizing the solidification of the normally liquid acetic acid at lower temperatures.
Carbon & its Compounds - 1 - Question 6
What is the main purpose of esterification in chemistry?
Detailed Solution for Carbon & its Compounds - 1 - Question 6
Esterification is a chemical reaction that involves the synthesis of esters. In this process, a carboxylic acid reacts with an alcohol to produce an ester and water. Esterification is commonly known for producing sweet-smelling esters, which find applications in various industries including food, fragrance, and cosmetics due to their pleasant aromas.
Carbon & its Compounds - 1 - Question 7

Detergents are more effective in than soaps.

Detailed Solution for Carbon & its Compounds - 1 - Question 7

The hardness of water is due to the presence of calcium and magnesium salts. Soaps react with these salts to form an insoluble precipitate in water; this reduces the effectiveness of soap. Detergents do not form insoluble precipitates with the calcium and magnesium ions in hard water. They are long chains of ammonium or benzene sulphonic acids and form lather easily even with hard water. The detergents do not form an insoluble precipitate with calcium and magnesium salts in water.

Carbon & its Compounds - 1 - Question 8
What is the primary reason why synthetic detergents are more effective than soap in hard water?
Detailed Solution for Carbon & its Compounds - 1 - Question 8
Synthetic detergents do not form scum in hard water, unlike traditional soaps. This is because the molecular structure of synthetic detergents allows them to interact differently with minerals in hard water, making them more effective for cleaning purposes.
Carbon & its Compounds - 1 - Question 9
What is the primary mechanism through which soap helps in cleaning dirt and grease?
Detailed Solution for Carbon & its Compounds - 1 - Question 9
The cleansing action of soap is attributed to the formation of structures called micelles. These micelles are spherical aggregates of soap molecules in water, where the hydrophobic tails of the soap molecules trap dirt and grease in the center, while the hydrophilic heads interact with water. This structure helps in solubilizing the dirt and grease, allowing them to be washed away with water.
Carbon & its Compounds - 1 - Question 10
What part of a soap molecule is responsible for its ability to dissolve oily dirt and grease?
Detailed Solution for Carbon & its Compounds - 1 - Question 10
The hydrophobic end, also known as the tail, of a soap molecule is responsible for dissolving oily dirt and grease. This hydrophobic end is attracted to non-polar substances like grease, while the hydrophilic (polar) end or head is attracted to water. This property allows soap to effectively remove dirt and grease from surfaces and fabrics by forming micelles that encapsulate the dirt and allow it to be washed away.
Carbon & its Compounds - 1 - Question 11
What role does micelle formation play in the cleansing action of detergents?
Detailed Solution for Carbon & its Compounds - 1 - Question 11
Micelle formation in detergents facilitates the emulsification of dirt and oil from surfaces. When micelles surround oily particles, they allow these particles to be suspended in water, enabling effective cleaning.
Carbon & its Compounds - 1 - Question 12
What is the catalyst commonly used in the addition reaction where unsaturated hydrocarbons add hydrogen?
Detailed Solution for Carbon & its Compounds - 1 - Question 12
The addition reaction involving the addition of hydrogen to unsaturated hydrocarbons often employs catalysts like palladium or nickel. This catalytic process facilitates the conversion of substances such as vegetable oils into vegetable ghee, a transformation commonly known as the hydrogenation of vegetable oils.
Carbon & its Compounds - 1 - Question 13
What type of reaction occurs when chlorine reacts with an alkane in the presence of sunlight?
Detailed Solution for Carbon & its Compounds - 1 - Question 13
The reaction between chlorine and an alkane in the presence of sunlight exemplifies a substitution reaction. During this halogenation process, chlorine molecules dissociate into highly reactive chlorine radicals when exposed to sunlight. These radicals can abstract hydrogen atoms from the alkane, forming hydrochloric acid and a hydrocarbon radical, which then leads to the formation of a chloroalkane.
Carbon & its Compounds - 1 - Question 14
What functional group can alcohols be converted into in the presence of oxidizing agents like alkaline KMnO4 or acidic potassium dichromate?
Detailed Solution for Carbon & its Compounds - 1 - Question 14
Alcohols can be converted into carboxylic acids in the presence of oxidizing agents such as alkaline KMnO4 (potassium permanganate) or acidic potassium dichromate. This oxidation process leads to the formation of carboxylic acids from alcohols through the removal of hydrogen or addition of oxygen, thereby altering the functional group of the compound.
Carbon & its Compounds - 1 - Question 15
What is the physical property of ethanol that makes it a neutral compound?
Detailed Solution for Carbon & its Compounds - 1 - Question 15
Ethanol is considered a neutral compound because of its colorless nature and pleasant smell. Despite its distinct physical properties like being soluble in water and having a low boiling point, it's the absence of acidic or basic characteristics that categorizes ethanol as neutral.
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