A student staying in a coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Which of the following is the correct reason?Options:Seawater contains more dissolved salts as compared to drinking water.Seawater contains less dissolved salts as compared to drinking water.Seawater is a source of naturally occurring elements.Seawater contains many aquatic organisms.
Question
A student staying in a coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Which of the following is the correct reason?Options:Seawater contains more dissolved salts as compared to drinking water.Seawater contains less dissolved salts as compared to drinking water.Seawater is a source of naturally occurring elements.Seawater contains many aquatic organisms.
Solution
The correct reason is that seawater contains more dissolved salts as compared to drinking water.
Here's why:
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Both seawater and drinking water can conduct electricity, but the degree to which they can do so depends on the amount of ions present in the water.
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Ions are charged particles that are formed when a salt dissolves in water. They are responsible for conducting electricity in water.
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Seawater contains a higher concentration of dissolved salts than drinking water. This means it has more ions available to conduct electricity.
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Therefore, when the student tests the seawater with his tester, the compass needle deflects more than it does in the case of drinking water. This is because the seawater, with its higher ion concentration, is able to conduct more electricity.
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