CBSE Class 12-science Answered
Give reasons for the following: (i) Fluorine atom is more electronegative than iodine atom but HF has lower acidic strength than HI.(ii) The electron affinity of fluorine is less than that of chlorine but the oxidizing power of fluorine is greater than that of chlorine.
Asked by Topperlearning User | 07 Jun, 2016, 11:04: AM
Expert Answer
(i)
HF bond is very strong because of small size of fluorine atom. So the dissociation energy of HF is very high.
In case of HI, the dissociation energy of HI bond is low due to large size of iodine atom.
Hence, HI is a stronger acid than HF.
(ii) The reduction potential of fluorine is greater than that of chlorine. Therefore the electron affinity of fluorine is less than that of chlorine but the oxidizing power of fluorine is greater than that of chlorine.
Answered by | 07 Jun, 2016, 01:04: PM
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