Free Printable Introduction to Organic Chemistry

1.

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.

a)

(1) only

b)

(2) only

c)

(1) and (3) only

d)

(2) and (3) only

2.

What is the general formula for saturated hydrocarbons?

a)

C_nH_2n

b)

C_nH_n+1

c)

C_nH_2n+1

d)

C_nH_2n+2

3.

Which is the structures with IUPAC nomenclature

2,2,4-trimethylpentane

a)

b)

c)

d)

4.

Give the IUPAC name for this compound

a)

3-methyl-4-ethylhexane

b)

3-ethyl-4-methylhexane

c)

3-methyl-4-ethylheptane

d)

3-ethyl-4-methylheptane

5.

Why do alkane not dissolve in water?

a)

they are less dense than water

b)

they have low melting points

c)

they are non-polar compounds

d)

they are chemically less reactive

6.

Give IUPAC nomenclature for this compound

a)

2,7-dimethyl-5-ethyloctane

b)

5-ethyl-2,7-dimethyloctane

c)

2,7-dimethyl-3-ethyloctane

d)

4-ethyl-2,7-dimethyloctane

7.

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

a)

20

b)

22

c)

40

d)

42

8.

The longer the hydrocarbon, the _______ the boiling point

a)

Lower

b)

Higher

9.

Which formula represents a saturated hydrocarbon?

a)

A

b)

B

c)

C

d)

D

10.

Which correctly represents an incomplete combustion of pentane?

a)

C₅H₁₂ + 8O₂ ⟶ 5CO₂ + 6H₂O

b)

C₅H₁₂ + 8O₂ ⟶ 4CO + CO₂ + 6H₂O

c)

C₅H₁₂ + 6O₂ ⟶ 4CO + CO₂ + 6H₂O

d)

C₅H₁₂ + 5O₂ ⟶ 4CO + CO₂ + 4H₂O + 2H₂

11.

Which equation represents a termination step?

a)

b)

c)

d)

12.

Which of the following has the highest boiling point?

a)

heptane

b)

pentane

c)

nonane

13.

Which step is this in the synthesis of chloroalkanes?

a)

Termination

b)

Initiation

c)

Propagation

d)

Position

14.

a)

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

b)

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

c)

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

d)

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

15.

What is the IUPAC name of the compound above?

a)

2,2-methyl-4-methylpentane

b)

4,4-dimethyl-2-methylpentane

c)

2,2-dimethyl-4-methylpentane

d)

2,2,4-trimethylpentane

16.

3,4-dimetyhlhexane has the following structure

a)

b)

c)

d)

17.

Ethane reacts with bromine under suitable condition.

Which is the product during the initiation step?

a)

bromine ion

b)

ethyl radical

c)

bromine radical

d)

hydrogen radical

18.

What is the condition for hydration of butene ?

a)

phosphoric acid, 60 atm, 300 ⁰C

b)

Nickel or platinum, 180^oC

c)

1000atm, 200 ^oC

d)

room temperature

19.

Which structure has the name E‐2‐bromo‐3‐chloropent‐2‐ene?

a)

b)

c)

d)

20.

What is the overall equation for the reaction of octane with bromine?

a)

$C_8H_{18}\ +\ Br_2\ \rightarrow\ C_8H_{16}Br_2\ +H_2$

b)

$C_8H_{18}\ +\ Br_2\ \rightarrow\ C_8H_{17}Br_{ }\ +HBr$

c)

$C_8H_{18}\ +\ Br_2\ \rightarrow\ 2C_4H_9Br_{ }$

d)

$C_8H_{18}\ +\ 3Br_2\ \rightarrow\ 2C_4H_7Br_{ }\ +4HBr$

Introduction to Organic Chemistry

Total questions: 20

Worksheet time: 20mins

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