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 both its bond polarities and molecular shape?

Accepted Answer

Water ($$H_2O)$$

Question 3

Given the condensed formula $$CH_3CH_2CH_2CH_3$$, which is the correct skeletal structure?

Accepted Answer

A zig-zag line with three bends (four carbons)

Question 4

Which of the following is a saturated hydrocarbon?

Accepted Answer

Hexane

Question 5

What is the molecular formula for cyclopentane?

Accepted Answer

$$C_5H_{10}$$

Question 6

Which functional group is present in ethanol?

Accepted Answer

Alcohol

Question 7

Which of the following is a structural isomer of butane ($$C_4H_{10}$$)?

Accepted Answer

Isobutane (2-methylpropane)

Question 8

Which statement best describes a chiral center in an organic molecule?

Accepted Answer

A carbon atom bonded to four different groups

Question 9

Which of the following reactions is classified as a synthesis reaction?

Accepted Answer

$$2H_2 + O_2$ \rightarrow 2H_2O$$

Question 10

Which of the following is true for an exergonic reaction?

Accepted Answer

$$\Delta G \u003c 0$$

Question 11

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

Accepted Answer

Decreasing concentration of reactants

Question 12

Which of the following is the correct balanced equation for the complete combustion of propane ($$C_3H_8$$)?

Accepted Answer

$$C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$$

Question 13

In the reaction $$Zn + Cu$$^{2+}$$ \rightarrow Zn$$^{2+}$$ + Cu$$, which substance is oxidized?

Accepted Answer

Zn

Question 14

What is the product of the hydrogenation of ethene ($$C_2H_4$$)?

Accepted Answer

Ethane ($$C_2H_6)$$

Question 15

Which of the following best describes the role of enzymes in biological reactions?

Accepted Answer

They act as biological catalysts

Question 16

Which of the following is a reversible reaction?

Accepted Answer

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

Question 17

Which of the following is a cis isomer?

Accepted Answer

A cycloalkane with two substituents on the same side of the ring

Question 18

Which of the following is the correct product of the hydration of 1-butene ($$CH_2=$$CHCH_2CH_3$$)?

Accepted Answer

2-butanol ($$CH_3CH(OH)CH_2CH_3)$$

Question 19

Which of the following best describes a decomposition reaction?

Accepted Answer

$$2KClO_3 \rightarrow 2KCl + 3O_2$$

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

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