Exam 22: Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The VSEPR theory predicts molecular shapes for the noble gas compounds. Which of these is correct? I) XeF2 is linear. II) XeOF2 is T-shaped. III) XeF4 is square planar.

Which of the following is found in Teflon, Freon-12, and in the acid commonly used to etch glass?

The Frasch process for the production of elemental sulfur has been largely supplanted by a gas-phase process using the reduction of sulfur dioxide by:

Iodine is only very slightly soluble in water, but it dissolves readily in an aqueous solution of sodium iodide, because molecular iodine acts as:

The most reactive of the nonmetallic elements is ________.

Which of the following is stored under water because of its property of igniting spontaneously upon contact with air?

What is the skeletal structure for chloric acid?

Which of the following name/formula combinations is INCORRECT?

Write a balanced half equation for the following couple: NO₃^- | NH₄⁺(acidic)

Hydrogen bonded with any metals form compounds called ionic hydrides.

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Write an equation for the oxidation in acid solution of Mn²⁺ to MnO₄^- by XeO₃, which is reduced to Xe(g).

If a certain natural gas supply contains 2.13% helium by mass, what amount of the natural gas must be processed, at 96.2% efficiency of helium recovery, to produce sufficient helium to inflate 24 party balloons to a volume of 5.3 L each at an internal gas pressure of 1.25 atm and a temperature of 23.7°C?

"Red" phosphorus is insoluble in carbon disulfide, has a broad melting range and a very low vapor pressure, and does not conduct electricity. This evidence suggests that this substance is probably:

Choose the INCORRECT statement.

Which of these is the strongest oxidizing agent?

Choose the INCORRECT oxidation state for xenon in the listed molecule.

HI(g) has a ΔGf° that is small and positive, so HI should dissociate to some extent but its activation energy is high. HI(g) is stable at room temperature. Chemists would describe the reason for the very slow dissociation reaction as:

Halogen molecules are diatomic.