Assertion: A red hot charcoal floats on the surface of water.
Reason: Its actual density is greater than water.

Assertion is correct but reason is incorrect.

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Assertion is incorrect but reason is correct.

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Both assertion and reason are correct but reason is not the correct explanation.

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Both assertion and reason are correct and reason is the correct explanation.

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Solution

The correct option is B Assertion is incorrect but reason is correct.
Charcoal has tiny pores on its surface. When it's heated to red hot, the air inside the pores of the charcoal comes out. Its density now will be greater than that of water. So, a red hot charcoal sinks in water and not floats.

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Assertion: A red hot charcoal floats on the surface of water. Reason: Its actual density is greater than water.

The correct option is B Assertion is incorrect but reason is correct.Charcoal has tiny pores on its surface. When it's heated to red hot, the air inside the pores of the charcoal comes out. Its density now will be greater than that of water. So, a red hot charcoal sinks in water and not floats.

Assertion: A red hot charcoal floats on the surface of water.
Reason: Its actual density is greater than water.

The correct option is B Assertion is incorrect but reason is correct.
Charcoal has tiny pores on its surface. When it's heated to red hot, the air inside the pores of the charcoal comes out. Its density now will be greater than that of water. So, a red hot charcoal sinks in water and not floats.