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Which of the following shows the correct sequence of acidic strength?(a) HClO4 > HBrO4 > HIO4(b) HClO4 < HBrO4 < HIO4(c) HClO4 = HBrO4 > HIO4(d) HClO4 > HIO4 > HBrO4I got this question by my school teacher while I was bunking the class.My doubt is from P-Block Elements in division P-Block Elements of Chemistry – Class 12

Answer» RIGHT choice is (a) HClO4 > HBRO4 > HIO4

The best EXPLANATION: As the electronegativity of the HALOGEN decreases, the tendency of the XO3 group to withdraw electrons of the O—H bond towards itself decreases and hence the acid strength of the perhalic acid decreases in the same order.


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