Carbon and its Compounds - 1 for Class 10 Science

Carbon & its Compounds - 1 - Question 1

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

A.
Synthetic detergents are more environmentally friendly.
B.
Synthetic detergents do not interact with hard water minerals.
C.
Synthetic detergents do not form scum in hard water.
D.
Synthetic detergents create a stronger lather in soft water.

Detailed Solution: 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

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

A.
Oxidation
B.
Combustion
C.
Dehydration
D.
Reaction with Sodium

Detailed Solution: Question 2

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.

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Carbon & its Compounds - 1 - Question 3

At what temperature does ethanoic acid boil?

A.
311 K
B.
351 K
C.
391 K
D.
431 K

Detailed Solution: Question 3

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 4

Why is pure acetic acid often referred to as "glacial acetic acid"?

A. Due to its colorless nature
B. Because it has a sour taste
C. Because it forms ice-like solid when frozen
D. Because it smells like vinegar

Detailed Solution: Question 4

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 5

What is the main purpose of esterification ?

A.
To produce a sour-smelling compound
B.
To form a sweet-smelling ester
C.
To create a basic solution
D.
To generate a colorless gas

Detailed Solution: Question 5

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 6

Detergents are more effective in than soaps.

A.
hard water
B.
soft water
C.
saline water
D.
None of these

Detailed Solution: Question 6

Detergents are more effective in hard water than soaps because hard water contains dissolved salts of calcium and magnesium.

When soap is used in hard water, it reacts with these salts to form an insoluble substance called scum, which does not lather and reduces the cleaning action.

Detergents, however, do not react with calcium and magnesium ions present in hard water. Therefore, they do not form scum and can produce lather easily, making them more effective for cleaning in hard water.

Hence, detergents are more effective in hard water than soaps.

Carbon & its Compounds - 1 - Question 7

What is the primary reason why synthetic detergents are more effective than soap in hard water?

A. They are made from petroleum and sulfuric acid.
B. They do not form scum in hard water.
C. They are more affordable than traditional soaps.
D. They are available in a wider variety of scents.

Detailed Solution: Question 7

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 8

What is the primary mechanism through which soap helps in cleaning dirt and grease?

A. By forming a layer of protection
B. By increasing the pH of water
C. By creating micelles
D. By emitting ultraviolet light

Detailed Solution: Question 8

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 9

What part of a soap molecule is responsible for its ability to dissolve oily dirt and grease?

A. The hydrophobic end
B. The ionic end
C. The long hydrocarbon chain
D. The polar head

Detailed Solution: Question 9

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 10

What role does micelle formation play in the cleansing action of detergents?

A. Micelles help detergents dissolve in water more easily.
B. Micelles allow detergents to lather effectively.
C. Micelles help emulsify dirt and oil from surfaces.
D. Micelles prevent the formation of scum in hard water.

Detailed Solution: Question 10

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 11

What is the catalyst commonly used in the addition reaction where unsaturated hydrocarbons add hydrogen?

A.
Gold
B.
Nickel
C.
Silver
D.
Iron

Detailed Solution: Question 11

The addition reaction involving the addition of hydrogen to unsaturated hydrocarbons often employs catalysts like nickel / palladium. 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 12

What type of reaction occurs when chlorine reacts with an alkane in the presence of sunlight?

A. Addition
B. Substitution
C. Combustion
D. Polymerization

Detailed Solution: Question 12

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 13

What functional group can alcohols be converted into in the presence of oxidizing agents like alkaline KMnO4 or acidified K₂Cr₂O₇?

A.
Aldehyde
B.
Ketone
C.
Carboxylic acid
D.
Ester

Detailed Solution: Question 13

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 14

Which of the following compounds has the suffix -al and is an example of an Aldehyde?

A.
Propanol
B.
Propanal
C.
Propanoic acid
D.
Propanone

Detailed Solution: Question 14

Propanal is an aldehyde, which uses the suffix "-al" as indicated in the table. Other options represent different types of compounds with different suffixes.

Carbon & its Compounds - 1 - Question 15

How many carbon atoms is each carbon bonded to in diamond?

A.
2
B.
3
C.
4
D.
6

Detailed Solution: Question 15

In a diamond, each carbon atom is bonded to four other carbon atoms. This structure forms a strong and rigid lattice.

This bonding results in a rigid 3D structure
Each bond is a covalent bond, which contributes to diamond's extreme hardness.

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Carbon & its Compounds - 1 - Free MCQ Test with solutions for Class 10

MCQ Practice Test & Solutions: Carbon & its Compounds - 1 (15 Questions)

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

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

At what temperature does ethanoic acid boil?

Why is pure acetic acid often referred to as "glacial acetic acid"?

What is the main purpose of esterification ?

Detergents are more effective in than soaps.

What is the primary reason why synthetic detergents are more effective than soap in hard water?

What is the primary mechanism through which soap helps in cleaning dirt and grease?

What part of a soap molecule is responsible for its ability to dissolve oily dirt and grease?

What role does micelle formation play in the cleansing action of detergents?

What is the catalyst commonly used in the addition reaction where unsaturated hydrocarbons add hydrogen?

What type of reaction occurs when chlorine reacts with an alkane in the presence of sunlight?

What functional group can alcohols be converted into in the presence of oxidizing agents like alkaline KMnO4 or acidified K₂Cr₂O₇?

Which of the following compounds has the suffix -al and is an example of an Aldehyde?

How many carbon atoms is each carbon bonded to in diamond?

Science Class 10

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Carbon & its Compounds - 1 - Free MCQ Test with solutions for Class 10

MCQ Practice Test & Solutions: Carbon & its Compounds - 1 (15 Questions)

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

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

At what temperature does ethanoic acid boil?

Why is pure acetic acid often referred to as "glacial acetic acid"?

What is the main purpose of esterification ?

Detergents are more effective in than soaps.

What is the primary reason why synthetic detergents are more effective than soap in hard water?

What is the primary mechanism through which soap helps in cleaning dirt and grease?

What part of a soap molecule is responsible for its ability to dissolve oily dirt and grease?

What role does micelle formation play in the cleansing action of detergents?

What is the catalyst commonly used in the addition reaction where unsaturated hydrocarbons add hydrogen?

What type of reaction occurs when chlorine reacts with an alkane in the presence of sunlight?

What functional group can alcohols be converted into in the presence of oxidizing agents like alkaline KMnO4 or acidified K2Cr2O7?

Which of the following compounds has the suffix -al and is an example of an Aldehyde?

How many carbon atoms is each carbon bonded to in diamond?

Science Class 10

Science Class 10

Top Courses for Class 10

About this Class 10 Practice Test

Explore more Class 10 Study Resources

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

What functional group can alcohols be converted into in the presence of oxidizing agents like alkaline KMnO4 or acidified K₂Cr₂O₇?