Assertion : $H_{2} O$ is the only hydride of group-16 which is liquid at ordinary temperature. Reason: In ice, each oxygen atom is surrounded by two covalent bonds and two hydrogen bonding.

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
$H_{2} O$ is only the hydride of group 16 elements whereas all others gases
In ice, each $H_{2} O$ molecule oxygen is held by two covalent bonds with two hydrogen atoms and two hydrogen bonds with two other water molecules. So both assertion and reason are correct but reason is not the correct explanation for assertion.
Hence option B is the correct.

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Assertion :H2O is the only hydride of group-16 which is liquid at ordinary temperature. Reason: In ice, each oxygen atom is surrounded by two covalent bonds and two hydrogen bonding.

Assertion : $H_{2} O$ is the only hydride of group-16 which is liquid at ordinary temperature. Reason: In ice, each oxygen atom is surrounded by two covalent bonds and two hydrogen bonding.