Free Printable OChem - U4 Alkene and Alkynes

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Worksheets

OChem - U4 Alkene and Alkynes

Total questions: 32

Worksheet time: 36mins

Name

Class

Date

1.

What is the general formula of the alkynes?

a)

C_nH_2n+1

b)

C_nH_2n+2

c)

C_nH_2n-1

d)

C_nH_2n-2

2.

Which of the following could contain a triple bond?

a)

C₄H₁₀

b)

C₄H₈

c)

C₄H₆

d)

C₄H₁₂

3.

How many hydrogen atoms are in butane

a)

4

b)

6

c)

8

d)

10

4.

What chemical is this? (C₅H₁₀)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

5.

Classify the compound based on the functional group present.

a)

alkane

b)

alkene

c)

alkyne

d)

aromatic

6.

a)

1-propene

b)

2-propyne

7.

Which of the following shows the structure of ethene?

a)

b)

c)

d)

8.

What is the name of this molecule?

a)

3-ethyl-2,4-methylheptane

b)

2,4-dimethyl-3-ethylheptane

c)

3-ethyl-2,4-dimethylheptane

d)

5-ethyl-4,6-dimethylheptane

9.

Which direction would you number the carbons in the main chain?

a)

Left to Right

b)

Right to Left

c)

It doesn't matter here since both directions would be carbon #2

10.

Name this molecule. Spelling and proper use of commas/dashes matter.

(a)

11.

Name this molecule. Spelling and proper use of commas/dashes matter.

(a)

12.

Name this molecule. Spelling and proper use of commas/dashes matter.

(a)

13.

Name this molecule. Spelling and proper use of commas/dashes matter.

(a)

14.

How many carbons are in the main carbon chain in this molecule?

a)

8

b)

6

c)

7

d)

9

15.

What is the common name for alkyl branch A in the image?

a)

sec-butyl

b)

propyl

c)

neopentyl

d)

isopropyl

16.

What is correct skeletal structure of this compound

a)

b)

c)

d)

17.

Review from module 4:
Is this reaction exothermic or endothermic?

a)

Exothermic, because the products are lower energy than the reactants

b)

Endothermic, because the products are lower energy than the reactants

c)

Exothermic, because the products are higher energy than the reactants

d)

Endothermic, because the products are higher energy than the reactants

18.

What is the correct name for the alkyne shown?

a)

butyne

b)

1-butyne

c)

2-butyne

d)

1-methyl-1-propyne

19.

What is the name of this hydrocarbon?

a)

1 - butane

b)

1 - butene

c)

2 - butane

d)

2 - butene

20.

General formula of Alkene is

a)

C_nH_2n+2

b)

C_nH_2n

c)

C_nH_2n+1OH

d)

C_nH_2n+1COOH

21.

What is the structure of 2-methyl pent-2-ene ?

a)

a

b)

b

c)

c

d)

d

22.

Which is the name of this compound?

a)

3-ethyl-2,2-dimethylhex-3-yne

b)

4-ethyl-5,5-methylhex-2-yne

c)

4-butylhex-2-yne

d)

4-ethyl-5,5-dimethylhex-2-yne

23.

Name this molecule

a)

2-methyl-pent-1-yne-3-ene

b)

1-methyl-pent-1-yne-3-ene

c)

2-methyl-pent-1-ene-3-yne

d)

1-methyl-pent-1-ene-3-yne

24.

Name the compound.

a)

nonene

b)

2,2-dimethyl-3-heptene

c)

1,1,5-trimethyl-2-hexene

d)

2,6-dimethyl-3-heptene

25.

Name the compound.

a)

nonene

b)

2,2-dimethyl-3-heptene

c)

1,1,5-trimethyl-2-hexene

d)

2,6-dimethyl-3-heptene

26.

Deduce the structure for A

a)

b)

c)

d)

27.

Deduce the structure for B

a)

b)

c)

d)

28.

Deduce the structure for C

a)

b)

c)

d)

29.

Deduce the structure for E

a)

b)

c)

d)

30.

Which the CORRECT reagent and condition for A

a)

HBr

b)

Cl₂, H₂O

c)

H₂, Ni

d)

HBr, H₂O₂

31.

Which the CORRECT reagent and condition for B

a)

H₂O, H⁺

b)

Cl₂, H₂O

c)

H₂, Ni

d)

HBr, H₂O₂

32.

Which the CORRECT reagent and condition for E

a)

Cl₂, H₂O

b)

H₂O, H⁺

c)

HBr, H₂O₂

d)

Cl₂, CH₂Cl₂

100 %

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