Discussion
Assertion (A) : An iron ball floats on mercury but gets immersed in water.
Reason (R) : The specific gravity of iron is more than that of mercury.
Answer: C
Correct answer: A is true but R is false.
An iron ball does float on mercury and sink in water, so A is true. But the reason is the reverse of what is stated: iron’s specific gravity, about 7.9, is less than mercury’s 13.6 and greater than water’s 1. R is false.
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