A) \[HCl{{O}_{4}}<HCl{{O}_{3}}<HClO<HCl{{O}_{2}}\]
B) \[HCl{{O}_{4}}<HCl{{O}_{3}}<HCl{{O}_{2}}<HClO\]
C) \[HClO<HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}\]
D) None of the above
Correct Answer: C
Solution :
Greater the oxidation number of central atom in oxyacids, more will be its acidic strength. (i) \[HCl{{O}_{4}}\] Let the oxidation state of \[Cl\]in \[HCl{{O}_{4}}=x\] \[\therefore \] \[+1+x+(-2\times 4)=0\] \[\therefore \] \[x=+7\] (ii) \[HCl{{O}_{3}}\] Let the oxidation state of Cl in \[HCl{{O}_{3}}=x\] \[+1+x+(-2\times 3)=0\] \[\therefore \] \[x=+\,5\] (iii) \[HCl{{O}_{2}}\] Let the oxidation state of Cl in \[HCl{{O}_{2}}=x\] \[\therefore \] \[1+1+x+(-2\times 2)=0\] \[\therefore \] \[x=+\,3\] (iv) \[HClO\] Let the oxidation state of Cl in \[HClO=x\] \[\therefore \] \[+1+x+(-2)=0\] \[\therefore \] \[x=+1\] \[\therefore \] The correct order of strength of acids is \[HClO<HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}\]
You need to login to perform this action.
You will be redirected in
3 sec
