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How many bonds does chlorine make with oxygen in perchloric acid?

(a) 3 double bonds and a single bond

(b) 7 single bonds

(c) 2 single bonds and 2 double bonds

(d) 3 single bonds and a double bond

This question was addressed to me in examination.

I would like to ask this question from P-Block Elements in section P-Block Elements of Chemistry – Class 12

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The correct option is (a) 3 double bonds and a single bond

The explanation: The formula for perchloric acid is HOClO3, in which the chlorine group is attached to 3 oxygen atoms and a hydroxyl group. The 3 oxygen atoms are attached to chlorine through a double bond and the hydroxyl group is singly bonded to chlorine. Thus, there are 3 double bonds and a single bond between oxygen and chlorine.

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