The Normal Boiling Points of Some Group 7A Hydrides Are

question 41

Multiple Choice

The normal boiling points of some group 7A hydrides are tabulated below. $$\begin{array} { l l } \text { Gas } & \mathrm { BP } \left( { } ^ { \circ } \mathrm { C } \right) \\\hline \mathrm { HF } & 19.7 \\\mathrm { HCl } & - 84.8 \\\mathrm { HBr } & - 66.4\end{array}$$
Which of the following intermolecular forces or bonds is responsible for the high boiling point of HF relative to HCl and HBr?

• A) Hydrogen bonding
• B) Dipole-induced dipole force
• C) Induced dipole-induced dipole force
• D) Covalent bonding
• E) Ion-induced dipole force

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