What type of pneumothorax is caused by a medical procedure during specific diagnostic or therapeutic procedures?

Atelectasis may be limited to the smallest lung unit that is the alveolus or _________ _______, or it may involve an entire lung or segment of the lung.

The major pathologic and anatomic alterations associated with atelectasis include partial or total collapse of the following:

The major pathologic or structural changes of the lungs that may result from a flail chest:

A spontaneous pneumothorax is secondary to certain underlying pathologic processes such as pneumonia, tuberculosis, and COPD. A spontaneous pneumothorax is sometimes caused by the rupture of a small bleb or bulla on the surface of the lung. This type of pneumothorax often occurs in tall, thin, people aged 15 to 35 years. 

Select the alkene(s) below that would NOT undergo a carbocation rearrangement following treatment with H2O and catalytic HCl.

A tension pneumothorax is life threatening. 

Select appropriate reagents/conditions to carry out each of the transformations (A-F) below. You may use each answer more than once or not at all.

Which of the following alkenes would produce the product mixture shown below under the indicated reaction conditions?

Rank the following alkenes in order of their heat of hydrogenation (ΔHH, least to most exothermic reaction). least exothermic [1] < [2] < [3] < [4] most exothermic