Question 1

Which type of carbon hybridization is present in the molecule acetylene ($$\mathrm{C_2H_2}$$)?

Accepted Answer

$$\mathrm{sp}$$

Question 2

How many $$\sigma$$ and $$\pi$$ bonds are present in a molecule of ethene ($$\mathrm{C_2H_4}$$)?

Accepted Answer

5 $$\sigma$$ and 1 $$\pi$$

Question 3

Which of the following functional groups is characterized by the general formula $$\mathrm{R-COOH}$$?

Accepted Answer

Carboxylic acid

Question 4

What is the correct IUPAC name for the following structure?

$$\mathrm{CH_3$-CH_2$-CH(CH_3$)-CH_2$-CH_3$}$$

Accepted Answer

3-methylpentane

Question 5

Which statement best describes a $$\pi (pi) $$bond?

Accepted Answer

It is formed by the lateral overlap of atomic orbitals.

Question 6

A molecule contains a carbon atom with three $$\sigma$$ bonds and one $$\pi$$ bond. What is the hybridization of this carbon atom?

Accepted Answer

$$\mathrm{sp^2$}$$

Question 7

Which of the following compounds is an example of an ether?

Accepted Answer

$$\mathrm{CH_3$-O-CH_3$}$$

Question 8

How many $$\pi$$ bonds are present in a molecule of 1,3-butadiene ($$\mathrm{CH_2$=CH-CH=CH_2$}$$)?

Accepted Answer

2

Question 9

Which suffix is used for naming ketones according to IUPAC nomenclature?

Accepted Answer

-anone

Question 10

What is the main criterion for selecting the principal chain in IUPAC nomenclature?

Accepted Answer

The longest continuous chain of carbon atoms

Question 11

Which of the following best describes an aromatic carbon chain?

Accepted Answer

A closed ring structure with alternating double bonds

Question 12

A compound has the formula $$\mathrm{CH_3$-CH_2$-Cl}. To $$which functional group does it belong?

Accepted Answer

Halide

Question 13

Which of the following is a correct description of a sigma ($$\sigma) $$bond?

Accepted Answer

It is formed by the head-on overlap of atomic orbitals.

Question 14

How many $$\sigma$$ and $$\pi$$ bonds are present in a molecule of ethyne ($$\mathrm{C_2H_2}$$)?

Accepted Answer

3 $$\sigma$$ and 2 $$\pi$$

Question 15

Which functional group is present in the molecule $$\mathrm{CH_3$-CHO}$$?

Accepted Answer

Aldehyde

Question 16

A molecule contains a carbon atom with two $$\sigma$$ bonds and two $$\pi$$ bonds. What is the hybridization of this carbon atom?

Accepted Answer

$$\mathrm{sp}$$

Question 17

Which of the following is an example of a carboxylic acid?

Accepted Answer

$$\mathrm{CH_3$-COOH}$$

Question 18

What is the correct IUPAC name for a straight-chain hydrocarbon with six carbon atoms and only single bonds?

Accepted Answer

Hexane

Question 19

Which of the following best describes a branched (ramificada) carbon chain?

Accepted Answer

A chain with at least one carbon atom attached to three or more other carbons

Question 20

Which functional group is present in the molecule $$\mathrm{CH_3$-NH_2$}$$?

Accepted Answer

Amine

Química Orgânica: Estudo dos Compostos de Carbono

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