Assertion (A) : $s - s$ Overlapping is present in $H_{2}$ molecule.
Reason (R) : $H_{2}$ Molecule is formed by the overlapping of’1s’ orbitals of 2 hydrogen atoms.

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Both A and R are correct and R is the correct explanation of A.

A is incorrect, R is correct.

A is correct, R is incorrect.

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

answer is A.

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Detailed Solution

Valence bond theory explains overlapping of atomic orbitals. Based on this theory $H_{2}$ molecule contains two hydrogen atoms. Its electronic configuration is ${1s}^{1}$ . 1s orbital’s of two hydrogen atoms partially merged to form $H_{2}$ molecule.

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