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Which of the following pairs illustrates isotopy?
...

Which of the following pairs illustrates isotopy?

A.

But-l-ene and but -2-ene

B.

Ortho-hydrogen and parahydrogen

C.

Oxygen and ozone

D.

Hydrogen and deuterium

E.

Alpha-particle and beta-particle

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Correct answer is D

No explanation has been provided for this answer.

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