_____ Display Ads Appear on Top of a Browser Window,blocking

question 46

Multiple Choice

_____ display ads appear on top of a browser window,blocking the user's view.

• A)Pop-under
• B)Pop-up
• C)Impression
• D)Banner

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Definitions:

Dienophile

A chemical compound with an electron-deficient double or triple bond that readily reacts with a diene in a Diels-Alder reaction to form cyclohexene derivatives.

HOMO

Highest Occupied Molecular Orbital; the electron orbital with the highest energy level that is occupied by electrons in a molecule under ground state conditions.

Mechanism

A detailed description of the step-by-step process by which chemical reactions occur, including the breaking and formation of bonds.

Endo Rule

A guideline in Diels-Alder reactions predicting that the endo product is preferred for thermodynamic or kinetic reasons.