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Solution


Q.

Which of the following statements is not true for halogens               [2018]
1 All form monobasic oxyacids.  
2 All are oxidizing agents.  
3 All but fluorine show positive oxidation states.  
4 Chlorine has the highest electron-gain enthalpy.  

Ans.

(3)

All halogens show both positive and negative oxidation states while fluorine shows only negative oxidation state except +1 in HOF.