Answer:
HCOOH
Step-by-step explanation:
HCOOH ( Formic Acid ) has higher boiling point than CH₃CH₂OH ( Ethanol ) .
Both the compounds have same molecular mass and should have similar boiling point too , but , Formic acid have higher boiling point than ethanol .
Since , Both formic acid and ethanol can form hydrogen bonds and now the strength of hydrogen bond will help to determine their boiling point .
Considering the case of ethanol , the hydrogen bond formed is weak due to lesser polarity of -OH while in case of Formic Acid , the - COOH provides more polarity due to the resonance stabilisation . Hence the boiling point of Formic Acid is more as it forms stronger Hydrogen Bond.