Assertion :Ammonia is a compound. Reason: Ammonia ( $N H_{3}$ ) consists of molecules of two different elements, nitrogen and hydrogen, bonded together.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Ammonia ( $N H_{3}$ ) molecules of two different elements, nitrogen and hydrogen, bonded together. Since it consists of atoms of more than one element chemically bonded, it is a compound.
$N H_{3}$ $N$ $H$
1 1 3

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Assertion :Ammonia is a compound. Reason: Ammonia (NH3) consists of molecules of two different elements, nitrogen and hydrogen, bonded together.

Assertion :Ammonia is a compound. Reason: Ammonia ( $N H_{3}$ ) consists of molecules of two different elements, nitrogen and hydrogen, bonded together.