pBlock ElementsII 2 Question 45
48. Arrange the following in the order of
(i) increasing bond strength $\mathrm{HCl}, \mathrm{HBr}, \mathrm{HF}, \mathrm{HI}$ (ii) increasing oxidation number of iodine
$$ \mathrm{I}{2}, \mathrm{HI}, \mathrm{HIO}{4}, \mathrm{ICl} $$
(1986, 2M)
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Solution:
- (i) Bond strength is inversely related to bond length. Hence, bond energy : $\mathrm{HI}<\mathrm{HBr}<\mathrm{HCl}<\mathrm{HF}$
(ii) $\mathrm{HI}(-1)<\mathrm{I}{2}(0)<\mathrm{ICl}(+1)<\mathrm{HIO}{4}(+7)$
