MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic Chemistryp -Block Elements (group 15-18)Previous Year Questions
The increases order of reducing power of halogen acid is (Manipal 2013)
A.HCl < HBr < HF < HI
B.HF < HCl < HBr < HI✓ Correct
C.HI < HBr < HCl < HF
D.HBr < HCl < HF < HI
Explanation
The increasing order of reducing power of halogen acid is HF < HCl < HBr < HI The reason is that, by increasing the size of halogen atom, the bond strength of H–X decreases. Thus, the ease of hydrogen donation increases and hence, reducing power increases.
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