Question 1

Which molecular geometry is predicted for methane ($$CH_4) $$using VSEPR theory?

Accepted Answer

Tetrahedral

Question 2

Which of the following molecules is polar due to its molecular shape, even though its bonds are polar?

Accepted Answer

Water ($$H_2O)$$

Question 3

What is the condensed structural formula for butane?

Accepted Answer

$$CH_3CH_2CH_2CH_3$$

Question 4

Which of the following is a saturated hydrocarbon?

Accepted Answer

Hexane

Question 5

How many structural isomers are possible for $$C_4H_{10}$$?

Accepted Answer

2

Question 6

Which functional group is present in ethanol?

Accepted Answer

Alcohol

Question 7

Which of the following statements about cis-trans isomerism is correct?

Accepted Answer

It occurs in cycloalkanes and alkenes.

Question 8

Which of the following molecules contains a chiral center?

Accepted Answer

2-butanol

Question 9

Which equation correctly represents the spontaneity of a reaction?

Accepted Answer

$$\Delta G \u003c 0$$

Question 10

In a reaction energy diagram, which type of reaction has products lower in energy than reactants?

Accepted Answer

Exergonic

Question 11

Which factor does NOT increase the rate of a chemical reaction?

Accepted Answer

Decreasing concentration of reactants

Question 12

Which type of chemical reaction is represented by $$2H_2 + O_2$ \rightarrow 2H_2O$$?

Accepted Answer

Synthesis

Question 13

What are the products of the complete combustion of a hydrocarbon?

Accepted Answer

$$CO_2$$ and $$H_2O$$

Question 14

Which of the following is an example of an oxidation-reduction (redox) reaction?

Accepted Answer

$$Zn + Cu$$^{2+}$$ \rightarrow Zn$$^{2+}$$ + Cu$$

Question 15

In the reaction $$C_2H_4 + H_2$ \rightarrow C_2H_6$$, what type of reaction is this?

Accepted Answer

Hydrogenation (addition)

Question 16

Which statement best describes the role of enzymes in chemical reactions?

Accepted Answer

Enzymes act as biological catalysts.

Question 17

Which of the following is a reversible reaction?

Accepted Answer

$$N_2 + 3H_2$$ \rightleftharpoons 2NH_3$$

Question 18

Which molecule is the product of the hydration of ethene ($$C_2H_4$$)?

Accepted Answer

Ethanol ($$C_2H_5OH)$$

Question 19

Which of the following is a structural isomer of pentane ($$C_5H_{12}$$)?

Accepted Answer

2-methylbutane

Question 20

Which of the following best describes the difference between a general chemical equation and an organic chemical equation?

Accepted Answer

General equations use element symbols, while organic equations use condensed or skeletal structures.

GOB Chemistry Exam 2 Study Guide: Covalent Compounds, Organic Structures, Thermodynamics, Kinetics, and Reactions

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