1.

Assertion. The O-O bond length in H_(2)O_(2) is shorter than that of O_(2)F_(2). Reason. H_(2)O_(2) is an ionic compound.

Answer»

If both assertion and REASON are true, and reason is the correct explanation of the assertion.
If both assertion and reason are ture, but reason is not the correct explanantion of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false

Solution :Correct assertion. The O-O BOND length in `H_(2)O_(2)` is longer than that in `O_(2)F_(2)`
Correct reason. The lone pairs of ELECTRONS on the O atoms are strongly attracted by the more electronegative F atoms. As a result, lone-PAIR-lone pair repulsion of the two O atoms in `O_(2)F_(2)` is far less than in `H_(2)O_(2)`. As a result, O-O bond length in `O_(2)F_(2) (1.22 Å)` is much SHORTER than in `H_(2)O_(2) (1.48 Å)`.


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