The Elements of Group 5A,the Nitrogen Family,form Compounds with Hydrogen

question 40

Multiple Choice

The elements of group 5A,the nitrogen family,form compounds with hydrogen having the boiling points listed below: SbH₃,-17 °C; AsH₃,-55 °C; PH₃,-87 °C; and NH₃,-33 °C
The first three compounds illustrate a trend where the boiling point decreases as the mass decreases; however,ammonia (NH₃) does not follow the trend because of _____.

• A) debye forces
• B) metallic bonding
• C) hydrogen bonding
• D) London dispersion forces
• E) ionic bonding

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Definitions:

Bimetallic Strip

A strip made of two dissimilar metals bonded together that bends at different temperatures, used in temperature sensing or control devices.

Thermal Expansion

The increase in volume of a substance due to a rise in temperature.

Electronic Overload Unit

A protective device that monitors the current to motors and disconnects power in case of overload, preventing damage.

Overload Unit Contacts

Components within an overload relay that open or close electrical circuits to provide motor protection against excessive current.