Chemistry
Grade-7
Easy
Question
Why are detergents better cleansing agents than soaps?
- Detergents form the lather
- Detergents have fragrance
- Detergents are denser
- Detergents are heavy
Hint:
Detergents can work in both soft and hard water.
The correct answer is: Detergents form the lather
Detergents from the lather is the reason that makes detergents better cleansing agents than soaps.
Synthetic detergents can be used in hard water washing, but soap is not suitable for hard water washing. Synthetic detergents lather in hard water.
This is because synthetic detergents also lather well in hard water because they do not form insoluble calcium or magnesium salts when they react with the calcium and magnesium ions present in hard water and form magnesium salts that reduce cleaning power.
Synthetic detergents are therefore better than soaps.
Related Questions to study
Chemistry
Scouts spend the night camping beside the water. They are required to wash everything in seawater.
What kind of material would be best for successfully washing their clothes?
- Soaps
- Bleach
- Detergent
- Antiseptic
Scouts spend the night camping beside the water. They are required to wash everything in seawater.
What kind of material would be best for successfully washing their clothes?
ChemistryGrade-7
- Soaps
- Bleach
- Detergent
- Antiseptic
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Which of the following is not used in the preparation of soap?
- Palmitic acid
- Stearic acid
- Acetic acid
- Lauric acid
Which of the following is not used in the preparation of soap?
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- Palmitic acid
- Stearic acid
- Acetic acid
- Lauric acid
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Select the correct answer regarding anionic detergent.
- Glyceryl oleate
- Sodium stearate
- Sodium lauryl sulfate
- Glyceryl sulfate
Select the correct answer regarding anionic detergent.
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- Glyceryl oleate
- Sodium stearate
- Sodium lauryl sulfate
- Glyceryl sulfate
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Which of the following is NOT true about soap?
- It has a hydrophobic tail
- It has a hydrophilic head
- It acts as a detergent
- It acts as an emulsifier
Which of the following is NOT true about soap?
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- It has a hydrophobic tail
- It has a hydrophilic head
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- It acts as an emulsifier
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To determine the kind of detergent, use the clue:
It is used in washing, has a negative head, and produces suds
- Anionic detergents
- Nonionic detergents
- Cationic detergent
- All the above
To determine the kind of detergent, use the clue:
It is used in washing, has a negative head, and produces suds
ChemistryGrade-7
- Anionic detergents
- Nonionic detergents
- Cationic detergent
- All the above
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What kind of soap is commonly used for scrubbing floors?
- Laundry soaps
- Toilet soaps
- Scouring soaps
- Medicated soap
What kind of soap is commonly used for scrubbing floors?
ChemistryGrade-7
- Laundry soaps
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- Scouring soaps
- Medicated soap
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______________ is produced as a byproduct and has a variety of uses in soaps
- Glycerin
- Petrol
- Kerosene
- Cooking oil
______________ is produced as a byproduct and has a variety of uses in soaps
ChemistryGrade-7
- Glycerin
- Petrol
- Kerosene
- Cooking oil
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Synthetic detergents have more advantages than soaps because synthetic detergents are
- Having strong cleansing action
- Useful for washing even in hard and acidic water
- Helpful in saving oil
- All the above are correct
Synthetic detergents have more advantages than soaps because synthetic detergents are
ChemistryGrade-7
- Having strong cleansing action
- Useful for washing even in hard and acidic water
- Helpful in saving oil
- All the above are correct
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Tadpole structure is reported to exist in the soap molecule.
- True
- False
Tadpole structure is reported to exist in the soap molecule.
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- True
- False
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Any substance which can remove dirt from the clothes is called as
- Detergents
- Soaps
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Any substance which can remove dirt from the clothes is called as
ChemistryGrade-7
- Detergents
- Soaps
- Both a and b
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Soaps are ______ based soapy detergents.
- Water
- Kerosene
- Petrol
- Oil
Soaps are ______ based soapy detergents.
ChemistryGrade-7
- Water
- Kerosene
- Petrol
- Oil
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Detergent is
- Sodium stearate
- Sodium alkyl sulfonate
- Gasoline
- Potassium pentanoate
Detergent is
ChemistryGrade-7
- Sodium stearate
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The non-metallic element that is purple black color is
- Iodine
- Chlorine
- Graphite
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The non-metallic element that is purple black color is
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- Iodine
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Which of the following solvents does iodine dissolve?
- Carbon chloride
- Hcl
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Which of the following solvents does iodine dissolve?
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- Carbon chloride
- Hcl
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Which of the following are the allotropes of carbon?
- Graphite
- Diamond
- Both A and B
- None of these
Which of the following are the allotropes of carbon?
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- Graphite
- Diamond
- Both A and B
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