Alkanes - Assessment

1.

Multiple Choice

2 mins

1 pt

Which of the following statements concerning the reaction of methane with bromine is/are correct?

(1) It is an addition reaction.

(2) It is a substitution reaction.

(3) A similar reaction will occur if propane is used instead of methane.

(1) only

(2) only

(1) and (3) only

(2) and (3) only

2.

Multiple Choice

2 mins

1 pt

What is the general formula for saturated hydrocarbons?

C_nH_2n

C_nH_n+1

C_nH_2n+1

C_nH_2n+2

3.

Multiple Choice

2 mins

1 pt

In organic chemistry, commas separate....

numbers

names from numbers

4.

Multiple Choice

2 mins

1 pt

In organic chemistry, dashes separate....

numbers

names from numbers

5.

Multiple Choice

3 mins

1 pt

Which is the structures with IUPAC nomenclature

2,2,4-trimethylpentane

6.

Multiple Choice

3 mins

1 pt

Give the IUPAC name for this compound

3-methyl-4-ethylhexane

3-ethyl-4-methylhexane

3-methyl-4-ethylheptane

3-ethyl-4-methylheptane

7.

Multiple Choice

2 mins

1 pt

Why do alkane not dissolve in water?

they are less dense than water

they have low melting points

they are non-polar compounds

they are chemically less reactive

8.

Multiple Choice

3 mins

1 pt

Give IUPAC nomenclature for this compound

2,7-dimethyl-5-ethyloctane

5-ethyl-2,7-dimethyloctane

2,7-dimethyl-3-ethyloctane

4-ethyl-2,7-dimethyloctane

9.

Multiple Choice

2 mins

1 pt

If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?

20

22

40

42

10.

Multiple Choice

2 mins

1 pt

Hydrocarbons are compounds that contain

Carbon, only

Carbon and Hydrogen, only

Carbon, Oxygen, and Hydrogen, only

Carbon, Oxygen, Hydrogen, and Nitrogen, only

11.

Multiple Choice

2 mins

1 pt

Methyl has the molecular formula

CH₄

CH₃

CH

CH₂

12.

Multiple Choice

2 mins

1 pt

The longer the hydrocarbon, the _______ the boiling point

Lower

Higher

13.

Multiple Choice

2 mins

1 pt

What is the exam definition of saturated?

No single bonds

Contains a double bond

No single bonds, all double bonds

No double bonds, all single bonds

14.

Multiple Choice

2 mins

1 pt

Which formula represents a saturated hydrocarbon?

A

B

C

D

15.

Multiple Choice

3 mins

1 pt

Which correctly represents an incomplete combustion of pentane?

C₅H₁₂ + 8O₂ ⟶ 5CO₂ + 6H₂O

C₅H₁₂ + 8O₂ ⟶ 4CO + CO₂ + 6H₂O

C₅H₁₂ + 6O₂ ⟶ 4CO + CO₂ + 6H₂O

C₅H₁₂ + 5O₂ ⟶ 4CO + CO₂ + 4H₂O + 2H₂

16.

Multiple Choice

2 mins

1 pt

Which equation represents a termination step?

17.

Multiple Choice

2 mins

1 pt

The boiling points of alkane molecules increase as their molecular sizes increase.

True

False

18.

Multiple Choice

2 mins

1 pt

Which of the following has the highest boiling point?

heptane

pentane

nonane

19.

Multiple Choice

2 mins

1 pt

Which step is this in the synthesis of chloroalkanes?

Termination

Initiation

Propagation

Position

20.

Multiple Choice

3 mins

1 pt

2,3-dimethyl-4,4-diethyl heptane

2,3-methyl-4,4-ethyl heptane

4,4-ethyl-2,3-methyl heptane

4,4-diethyl-2,3-dimethyl heptane

21.

Multiple Choice

2 mins

1 pt

Why do alkane not dissolve in water?

they are less dense than water

they have low melting points

they are non-polar compounds

they are chemically less reactive

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