• # question_answer Explain why HF is less viscous than ${{H}_{2}}O$.

Answer:

There is greater intermolecular hydrogen bonding in ${{H}_{2}}O$ than that in HF as each ${{H}_{2}}O$ molecule forms four H-bonds with other water molecules whereas HF forms only two H- bonds with other HF molecules. Greater the intermolecular H- bonding, greater is the viscosity. Hence, HF is less viscous than ${{H}_{2}}O$.

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