Assertion (A) : H - bonding occurs in $H_{2} O$ due to high polarity of $O - H$ bond.
Reason ( R) : The size of $‘ O^{'}$ atom is larger than $H$ -atoms.

Both A and R are true and R is the correct explanation to A.

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Both A and R are true but R is not the correct explanation to A.

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A is true but R is false.

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A is false but R is true.

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Solution

The correct option is B Both A and R are true but R is not the correct explanation to A.
H-bond is the electrostatic force of attraction between the positive charge on $H$ -atom and negative charge on oxygen atom. These partial positive and negative charges are due to high polarity of $O - H$ bond.

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Assertion (A) : H - bonding occurs in H2O due to high polarity of O−H bond.Reason ( R) : The size of ‘O′ atom is larger than H-atoms.

The correct option is B Both A and R are true but R is not the correct explanation to A.H-bond is the electrostatic force of attraction between the positive charge on H-atom and negative charge on oxygen atom. These partial positive and negative charges are due to high polarity of O−H bond.

Assertion (A) : H - bonding occurs in $H_{2} O$ due to high polarity of $O - H$ bond.
Reason ( R) : The size of $‘ O^{'}$ atom is larger than $H$ -atoms.

The correct option is B Both A and R are true but R is not the correct explanation to A.
H-bond is the electrostatic force of attraction between the positive charge on $H$ -atom and negative charge on oxygen atom. These partial positive and negative charges are due to high polarity of $O - H$ bond.