JEE Main 2014 · 6 Apr · Shift 1 · Chemistry Q41

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ChemistrySingle correct+4 / -1Question 41 of 90

Among the following oxoacids, the correct decreasing order of acid strength is :

\ce{HOCl > HClO2 > HClO3 > HClO4}

\ce{HClO4 > HOCl > HClO2 > HClO3}

\ce{HClO4 > HClO3 > HClO2 > HOCl}

\ce{HClO2 > HClO4 > HClO3 > HOCl}

Answer and worked solution

Official answer: C

More O atoms on Cl give a higher Cl oxidation state and more delocalisation of the anion's charge, so the acid is stronger:
$\ce{HClO4 > HClO3 > HClO2 > HOCl}.$

Topics:Oxoacids Group 17

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JEE Main 2014 · 6 Apr · Shift 1, Chemistry question 41