JEE Advanced Chemistry question

Statement 1: Helium is the only substance that can't be solidified at atmospheric pressure Statement 2: The zero point energy of helium is very high

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

Helium is indeed unique in that it cannot be solidified at atmospheric pressure no matter how low the temperature is taken — it requires additional external pressure to force it into a solid lattice, making Statement 1 true. This is because helium's zero-point energy (the residual quantum-mechanical vibrational energy

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Question ID VK-159302