Organic Chemistry Practice Exam 4

The video tutorial covers various chemistry topics, starting with transformations and reagents needed for converting dienes to alkenes through hydrogenation. It then explores the conversion of haloalkanes to alkanes using elimination and hydrogenation. The tutorial also discusses molecular shapes, focusing on trigonal pyramidal configurations, and identifies ionic bonds. Hybridization and line notation are explained, followed by a detailed guide on IUPAC nomenclature for organic compounds. Finally, the video demonstrates drawing and analyzing cyclohexane chair conformations, emphasizing stability and energy considerations.

What is the primary reagent used for the hydrogenation of dienes?

• Sulfuric acid

• Platinum catalyst

• Sodium hydroxide

• Bromine

Which reagent is used to ensure exclusive elimination in haloalkanes?

• Tert-butoxide

• Sodium chloride

• Ammonia

• Water

Which compound has a trigonal pyramidal molecular shape?

• Methane (CH4)

• Ammonia (NH3)

• Boron trifluoride (BF3)

• Carbon dioxide (CO2)

How can you quickly determine if a bond is ionic?

• By checking if both elements are gases

• By checking if both elements are metals

• By checking if both elements are non-metals

• By checking if one element is a metal and the other is a non-metal

Which of the following is an example of an ionic compound?

• Water (H2O)

• Potassium bromide (KBr)

• Oxygen (O2)

• Methane (CH4)

What is the hybridization of an atom with four electron domains?

• SP

• SP2

• SP3

• SP3D

What is the first step in determining the IUPAC name of a compound?

• Count the number of hydrogen atoms

• Identify the substituents

• Identify the parent chain

• Determine the molecular weight

In IUPAC nomenclature, which prefix is considered in alphabetical order?

• Sec-butyl

• Tert-butyl

• Iso-propyl

• Di-methyl

What is the most stable conformation of a cyclohexane chair?

• All substituents equatorial

• All substituents axial

• Larger substituents axial

• Larger substituents equatorial

What happens to axial and equatorial positions when a cyclohexane chair flips?

• No change occurs

• Equatorial becomes axial only

• Axial remains axial

• Axial becomes equatorial and vice versa