Question 1

Which statement best describes the difference between organic and inorganic chemistry?

Accepted Answer

Organic chemistry is the study of carbon-containing compounds, while inorganic chemistry deals with salts, acids, bases, and chemical bonding fundamentals.

Question 2

What is the geometry and bond angle of methane ($CH_4$)?

Accepted Answer

Tetrahedral, $109.5^	ext{o}$

Question 3

Which of the following is true about carbon atoms in organic compounds?

Accepted Answer

Carbon always forms four covalent bonds.

Question 4

Which type of bond is present in ethene ($C_2H_4$) and what is its bond angle?

Accepted Answer

Double bond, $120^	ext{o}$

Question 5

Why do alkenes exhibit cis-trans isomerism?

Accepted Answer

Because the double bond restricts rotation, leading to different spatial arrangements.

Question 6

Which reaction converts an alkene into an alkane using $H_2$ and a metal catalyst?

Accepted Answer

Hydrogenation

Question 7

What is the product when ethene ($C_2H_4$) undergoes hydration?

Accepted Answer

Ethanol ($CH_3CH_2OH$)

Question 8

Which of the following best describes a polymer?

Accepted Answer

A large molecule made up of many small repeating units called monomers.

Question 9

Which functional group is present in all alcohols?

Accepted Answer

Hydroxyl group ($-OH$)

Question 10

What is the IUPAC name for $CH_3CH_2OH$?

Accepted Answer

Ethanol

Question 11

Which statement correctly distinguishes phenols from alcohols?

Accepted Answer

Phenols have a hydroxyl group attached to an aromatic ring, while alcohols have a hydroxyl group attached to any carbon.

Question 12

Which of the following is true about thiols?

Accepted Answer

Thiols contain a thiol group ($-SH$) attached to a carbon.

Question 13

What is the result of oxidizing two thiol groups ($-SH$) in proteins?

Accepted Answer

Formation of a disulfide bond ($-S-S-$)

Question 14

Which reaction is the reverse of hydration of an alcohol?

Accepted Answer

Dehydration

Question 15

What is the product of the combustion of ethanol ($CH_3CH_2OH$) in oxygen?

Accepted Answer

Carbon dioxide, water, and energy

Question 16

Which functional group is present in ethers?

Accepted Answer

An oxygen atom attached by single bonds to two carbons ($R-O-R'$)

Question 17

What is the general result of oxidizing an alcohol?

Accepted Answer

Conversion of a single bond to a double bond, forming a carbonyl group

Question 18

Which of the following is a real-world application of hydrogenation of alkenes?

Accepted Answer

Production of margarine from vegetable oils

Question 19

Which process is responsible for the formation of plastics such as polyethylene?

Accepted Answer

Polymerization of ethene

Question 20

Which of the following statements about aromatic compounds is correct?

Accepted Answer

Aromatic compounds all contain a ring structure with delocalized electrons.

CH 12+13 STUDY NOTES

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