Assertion :In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons. Reason: Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.

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 D Both Assertion and Reason are incorrect
Correct assertion=In the formation of the $H_{2} O$ molecule, $O x y g e n$ attains octet and $h y d r o g e n$ attain duplet of electrons,
Correct reason= $o x y g e n$ atom only forms $2$ covalent bonds with $h y d r o g e n$ .
So the correct option is [D].

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(b) Assertion and reason both are wrong statements.
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Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

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Assertion :In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons. Reason: Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.

The correct option is D Both Assertion and Reason are incorrectCorrect assertion=In the formation of the H2O molecule, Oxygen attains octet and hydrogen attain duplet of electrons,Correct reason= oxygen atom only forms 2 covalent bonds with hydrogen.So the correct option is [D].