Question 1

Which of the following statements best describes a chiral center in organic molecules?

Accepted Answer

A tetrahedral carbon atom bonded to four different substituents.

Question 2

Which of the following pairs are enantiomers?

Accepted Answer

Two molecules that are non-superimposable mirror images.

Question 3

According to the mnemonic 'OIL RIG', which process describes reduction?

Accepted Answer

Gain of electrons

Question 4

Which of the following reactions is an example of an exothermic process?

Accepted Answer

Combustion of methane gas

Question 5

A reaction has a negative Gibbs free energy ($$\Delta G \u003c 0). $$Which of the following is true?

Accepted Answer

The reaction is spontaneous.

Question 6

Which of the following best describes the role of a catalyst in a chemical reaction?

Accepted Answer

It decreases the activation energy.

Question 7

Which of the following is the correct combined gas law equation?

Accepted Answer

$$\displaystyle \frac{P_1$ V_1$}{T_1$} = \frac{P_2$ V_2$}{T_2$}$$

Question 8

Which of the following best describes the difference between amylose and amylopectin?

Accepted Answer

Amylose is unbranched, while amylopectin is branched.

Question 9

Which of the following statements about glycolysis is correct?

Accepted Answer

Glycolysis is the breakdown of glucose to produce energy in the form of ATP.

Question 10

Which of the following molecules is a ketose?

Accepted Answer

D-fructose

Question 11

A carbohydrate with five carbon atoms is called a:

Accepted Answer

Pentose

Question 12

Which of the following best describes the difference between anomeric carbons in glucose?

Accepted Answer

They are the carbonyl carbon in the open-chain form and become a new chiral center in the cyclic form.

Question 13

Which of the following best explains why oil floats on water?

Accepted Answer

Oil is less dense than water and is hydrophobic.

Question 14

Which of the following is NOT a type of intermolecular force?

Accepted Answer

Covalent bonding

Question 15

Which of the following best describes the fluid mosaic model of the cell membrane?

Accepted Answer

A flexible bilayer of phospholipids with proteins and cholesterol embedded throughout.

Question 16

Which of the following statements about cholesterol is correct?

Accepted Answer

Cholesterol is a steroid that helps maintain membrane fluidity in animal cells.

Question 17

Which of the following best describes the difference between fats and oils?

Accepted Answer

Fats are usually solid at room temperature and contain more saturated fatty acids than oils.

Question 18

A sample of gas has a volume of $$2.0\ \mathrm{L} at a $$pressure of $$1.0\ \mathrm{atm}$$ and a temperature of $$300\ \mathrm{K}. $$What will the volume be at $$2.0\ \mathrm{atm}$$ and $$300\ \mathrm{K}$$? (Assume ideal gas behavior.)

Accepted Answer

$$1.0\ \mathrm{L}$$

Question 19

Which of the following best describes Markovnikov’s rule as applied to the hydration of alkenes?

Accepted Answer

The hydrogen atom adds to the carbon with the most hydrogens already attached.

Question 20

Which of the following is a correct statement about chemical equilibrium?

Accepted Answer

At equilibrium, the rates of the forward and reverse reactions are equal.

Chem 1110 Exam 3 Study Guide: Stereochemistry, Chemical Reactions, Carbohydrates, and States of Matter

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