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                                    The pair of molecules forming strongest hydrogen bonds areA. `SiH_(4) and SiF_(6)`B. `CH_(3)-underset(O) underset(||)C-CH_(3) and CHCl_(3)`C. `H-underset(O) underset(||) C-OH and CH_(3)- underset(O) underset(||)C-OH`D. `H_(2)O and H_(2)` | 
                            
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Answer» Correct Answer - C Strongest H-bonds are fomed in between `HCOOH and CH_(3)COOH`. This is because H- bonding increase with electronegativity decreases with size or atom.  | 
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