Assertion :All the three isotopes of hydrogen have almost the same chemical properties. Reason: Isotopes differ from one another in respect of the presence of neutrons.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Isotopes have almost the same chemical properties because they have the same electronic configuration. All three isotopes of hydrogen have 1 electron in their valence shell. $_{1}^{1} H$ , $_{1}^{2} H$ and $_{1}^{3} H$ have 0, 1 and 2 neutrons respectively.

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