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Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?
- a)The water in villages is dirty
- b)The water has a high concentration of dissolved calcium and magnesium
- c)The soaps that villagers use are different
- d)The water is not appropriate for hand washing
Correct answer is option 'B'. Can you explain this answer?
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Sunil went to his uncle’s village in his summer vacation. He not...
This type of water is known as "hard water." Hard water makes it difficult to form a lather with soap, leading to the soap taking longer to rinse off. This is because the calcium and magnesium ions in hard water react with the soap to form an insoluble substance that does not easily wash away.
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Sunil went to his uncle’s village in his summer vacation. He not...
Reason for the slow removal of soap in the village:
- High concentration of dissolved calcium and magnesium:
The main reason why it takes Sunil a long time to remove soap properly in his uncle's village is due to the high concentration of dissolved calcium and magnesium in the water. These minerals are known as "hard water minerals" and can react with the soap to form insoluble compounds. This reaction creates a scum that makes it difficult to rinse off the soap completely.
- Effect on soap:
When soap is used in hard water, it forms a sticky residue that is not easily washed away. This residue can stick to the skin and make it challenging to remove the soap completely. As a result, Sunil may find that he needs to use more water and spend more time rinsing his hands to get rid of the soap residue.
- Impact on hand washing:
The presence of high levels of calcium and magnesium in the water can also affect the effectiveness of hand washing. The soap may not lather as well in hard water, making it harder to remove dirt and bacteria from the hands. This can lead to incomplete cleaning and potentially increase the risk of infections.
- Solution:
To address this issue, Sunil can consider using a soap that is specifically designed for use in hard water. These soaps contain ingredients that can help counteract the effects of hard water minerals and improve the lathering and rinsing process. Additionally, he can also install a water softener in his uncle's village to reduce the concentration of calcium and magnesium in the water, making it easier to wash off soap effectively.
- High concentration of dissolved calcium and magnesium:
The main reason why it takes Sunil a long time to remove soap properly in his uncle's village is due to the high concentration of dissolved calcium and magnesium in the water. These minerals are known as "hard water minerals" and can react with the soap to form insoluble compounds. This reaction creates a scum that makes it difficult to rinse off the soap completely.
- Effect on soap:
When soap is used in hard water, it forms a sticky residue that is not easily washed away. This residue can stick to the skin and make it challenging to remove the soap completely. As a result, Sunil may find that he needs to use more water and spend more time rinsing his hands to get rid of the soap residue.
- Impact on hand washing:
The presence of high levels of calcium and magnesium in the water can also affect the effectiveness of hand washing. The soap may not lather as well in hard water, making it harder to remove dirt and bacteria from the hands. This can lead to incomplete cleaning and potentially increase the risk of infections.
- Solution:
To address this issue, Sunil can consider using a soap that is specifically designed for use in hard water. These soaps contain ingredients that can help counteract the effects of hard water minerals and improve the lathering and rinsing process. Additionally, he can also install a water softener in his uncle's village to reduce the concentration of calcium and magnesium in the water, making it easier to wash off soap effectively.
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Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer?
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Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer? for Class 4 2024 is part of Class 4 preparation. The Question and answers have been prepared according to the Class 4 exam syllabus. Information about Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 4 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer?.
Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer? for Class 4 2024 is part of Class 4 preparation. The Question and answers have been prepared according to the Class 4 exam syllabus. Information about Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 4 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer?.
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Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Sunil went to his uncle’s village in his summer vacation. He noticed that whenever he applied soap on his hands, it took him a long time to remove it properly. Why?a)The water in villages is dirtyb)The water has a high concentration of dissolved calcium and magnesiumc)The soaps that villagers use are differentd)The water is not appropriate for hand washingCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
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