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Hydrogen bonds are formed in many compounds e.g., H20, HF, NH3. The boiling point of such compounds depends to a large extent on the strength of hydrogen bond and the number of hydrogen bonds: The correct decreasing order of the boiling points of above compounds is
(a) HF>H20>NH3                        
(b) H20>HF>NH3
(c) NH3>HF>H20                       

(d) NH3>H20>HF

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THE CORRECT ANSWER IS OPTION (A) AS STRENGTH OF HYDROGEN BOND IS MAXIMUM IN HF AS FLUORINE IS MOST ELECTRONEGATIVE THAN OXYGEN THAN NITROGEN,SO HF HAVE STRONGEST HYDROGEN BOND.
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