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Ionic Radii and Ionisation Enthalpy (Group 2)

Assertion :Ox...

Question

Assertion :Oxygen is an element. Reason: oxygen exists in the form of diatomic molecules at room temperature and atmospheric pressure.

A

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

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B

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

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C

Assertion is correct but Reason is incorrect

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D

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
Elements are chemically the simplest substances and hence cannot be broken down using chemical methods
Oxygen is an element and a molecule both in its naturally occuring state.
In atmosphere oxygen exists as a diatomic molecule, 2 atoms of oxygen covalently bonded to one another to form stable oxygen molecule.

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(a) Assertion and reason both are correct and reason is correct explanation of assertion.
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