Quiz about Organic Chemistry Basics

Question 1

Which functional group is surrounded in the molecule?

Accepted Answer

Carbonyl

Answer

Hydroxyl

Answer

Carboxyl

Answer

Ester

Question 2

Which element is found in all organic molecules?

Accepted Answer

Carbon (C)

Answer

Oxygen (O)

Answer

Hydrogen (H)

Answer

Nitrogen (N)

Question 3

Which is the organic compound?

Accepted Answer

urea, CH₄N₂O

Answer

silane, SiH₄

Answer

ammonium sulfide, (NH₄)₂S

Answer

sodium chloride, NaCl

Question 4

Which compound is not in the same homologous series as the others?

Accepted Answer

C6H12

Answer

C5H12

Answer

C7H16

Answer

C8H18

Question 5

name the group that has a single bond

Accepted Answer

alkanes

Answer

alkenes

Answer

alcohols

Answer

ethers

Question 6

What property allows us to separate hydrocarbons during fractional distillation?

Accepted Answer

Different hydrocarbons have different boiling points

Answer

Different hydrocarbons have different melting points

Answer

Different hydrocarbons are different colours

Answer

Some hydrocarbons have a positive charge and others have a negative charge

Question 7

What is the name of the alkane with two carbon atoms?

Accepted Answer

Ethane

Answer

Methane

Answer

Butane

Answer

Propane

Question 8

What chemicals are found in crude oil?

Accepted Answer

A mixture of compounds, which are mostly hydrocarbons

Answer

Methane only

Answer

A mixture of elements

Answer

Carbon only

Question 9

What is the definition of a hydrocarbon?

Accepted Answer

A compound made of hydrogen and carbon only

Answer

A compound that includes hydrogen or carbon

Answer

A mixture that includes hydrogen and carbon

Answer

A mixture of hydrogen and carbon only

Question 10

What is the first stage in the fractional distillation of crude oil?

Accepted Answer

Heating, to vaporise the hydrocarbons

Answer

Heating, to make it a hot liquid

Answer

Cooling it

Answer

Separating the fractions

Question 11

What compounds are produced in the complete combustion of hydrocarbons?

Accepted Answer

Carbon dioxide and water

Answer

Carbon monoxide and water

Answer

Carbon dioxide and nitrogen

Answer

Water and nitrogen

Question 12

What is the general formula of the alkanes?

Accepted Answer

n carbon atoms, 2n+2 hydrogen atoms

Answer

n carbon atoms, 2n hydrogen atoms

Answer

2n carbon atoms, n hydrogen atoms

Answer

n carbon atoms, n+2 hydrogen atoms

Question 13

Which is the best description of fractional distillation?

Accepted Answer

Separating the hydrocarbons in crude oil into fractions, with each fraction containing molecules with a similar number of carbon atoms

Answer

Breaking down longer hydrocarbon chains into smaller ones that are more useful

Answer

Pumping crude oil out from under the sea

Answer

Ensuring resources are used to meet the needs of current generations without compromising the needs of future generations

Question 14

How was crude oil formed?

Accepted Answer

From the remains of an ancient biomass, consisting mainly of plankton, that was buried in mud

Answer

Mostly from the remains of dinosaur bones

Answer

By fractional distillation

Answer

By cracking

Question 15

What is the functional group present in alcohols?

Accepted Answer

Hydroxyl group (-OH)

Answer

Carbonyl group (C=O)

Answer

Carboxyl group (-COOH)

Answer

Amino group (-NH2)

Question 16

Which of the following is a saturated hydrocarbon?

Accepted Answer

Propane (C3H8)

Answer

Ethene (C2H4)

Answer

Ethyne (C2H2)

Answer

Benzene (C6H6)

Question 17

What is the IUPAC name for the compound with the formula $$C_2H_5OH$$ ?

Accepted Answer

Ethanol

Answer

Methanol

Answer

Propanol

Answer

Butanol

Question 18

In an experiment, which reagent is used to test for the presence of unsaturation in hydrocarbons?

Accepted Answer

Bromine water

Answer

Limewater

Answer

Benedict's solution

Answer

Iodine solution

Question 19

Which of the following statements is true about isomers?

Accepted Answer

They have the same molecular formula but different structural formulas

Answer

They have different molecular formulas and different structural formulas

Answer

They have the same structural formula but different molecular formulas

Answer

They have identical physical and chemical properties

Organic Chemistry Basics

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