Question 1

Which hybridization scheme is present in the carbon atoms of ethane ($$\mathrm{C_2H_6}$$)?

Accepted Answer

$$\mathrm{sp^3$}$$

Question 2

What is the bond angle around each carbon atom in ethene ($$\mathrm{C_2H_4}$$)?

Accepted Answer

$$120^\circ$$

Question 3

Which of the following best describes the bonding in benzene ($$\mathrm{C_6H_6}$$)?

Accepted Answer

Delocalized $$\pi$$ electrons above and below the ring

Question 4

Which qualitative test can distinguish between terminal and non-terminal alkynes?

Accepted Answer

Ammoniacal silver nitrate test

Question 5

A compound contains 42.9% C, 2.4% H, 16.7% N, and 38.1% O by mass. Its molecular weight is 168 g/mol. What is its molecular formula?

Accepted Answer

$$\mathrm{C_6H_4N_2O_4}$$

Question 6

Which statement about the physical properties of alkanes is correct?

Accepted Answer

Branched alkanes have lower boiling points than straight-chain alkanes.

Question 7

Which reaction mechanism describes the halogenation of alkanes?

Accepted Answer

Free radical substitution

Question 8

What is the major product when 2-methylpropane reacts with potassium permanganate ($$\mathrm{$$KMnO_4$$}$$)?

Accepted Answer

No reaction occurs

Question 9

Which rule governs the addition of hydrogen halides to asymmetric alkenes?

Accepted Answer

Markovnikov's rule

Question 10

Which of the following is a correct IUPAC name for a compound with the structure $$\mathrm{CH_3CH_2CH=CH_2$}$$?

Accepted Answer

1-Butene

Question 11

Which functional group is present in the following structure: $$\mathrm{R-COOH}$$?

Accepted Answer

Carboxylic acid

Question 12

Which type of intermolecular force is responsible for the high boiling point of alcohols compared to alkanes?

Accepted Answer

Hydrogen bonding

Question 13

Which qualitative test can be used to distinguish between a primary, secondary, and tertiary alcohol?

Accepted Answer

Lucas test

Question 14

Which of the following is a correct condensed formula for 2-methyl-2-butanol?

Accepted Answer

$$\mathrm{CH_3C(OH)(CH_3$)_2CH_3}$$

Question 15

Which of the following is NOT a product of the ozonolysis of 2-pentene ($$\mathrm{CH_3CH=CHCH_2CH_3}$$)?

Accepted Answer

Butan-2-one ($$\mathrm{CH_3COCH_2CH_3})$$

Question 16

Which of the following is a correct statement about the geometry and hybridization of the central carbon atom in acetylene ($$\mathrm{C_2H_2}$$)?

Accepted Answer

Linear, $$\mathrm{sp}$$

Question 17

Which of the following is a correct IUPAC name for a compound with the structure $$\mathrm{CH_3CH_2C\equiv CH}$$?

Accepted Answer

1-Butyne

Question 18

Which functional group is present in the following structure: $$\mathrm{R-O-R}$$?

Accepted Answer

Ether

Question 19

Which of the following reactions is used industrially to produce ethene ($$\mathrm{C_2H_4}$$)?

Accepted Answer

Dehydration of ethanol

Question 20

Which of the following is a correct statement about the reactivity of alkenes compared to alkanes?

Accepted Answer

Alkenes are more reactive due to the presence of $$\pi$$ electrons.

CHEM 130: Introduction to Organic Chemistry – Structured Study Notes

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