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Carbon Compounds (Alkenes)

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.

Alkenes are ………………………….. hydrocarbons

a)

saturated

b)

unsaturated

c)

diplotic

d)

monoprotic

2.

The names of alkenes end with ……………………………

a)

anes

b)

enes

c)

ane

d)

ene

3.

The general formula for alkenes is ……………………………

a)

CnH2n+1 , n = 1, 2, 3, 4, 5…

b)

CnH2n , n = 1, 2, 3, 4, 5…

c)

CnH2n+1 , n = 2, 3, 4, 5…

d)

CnH2n , n = 2, 3, 4, 5…

4.

Generally alkenes have …………………….. melting and boiling point but ………………..as the number of carbon atoms per molecule increases

a)

high, decrease

b)

low, decrease

c)

high, increase

d)

low, increase

5.

Which of the following are NOT the physical properties of Alkenes?

a)

Cannot conduct electricity

b)

Low density

c)

Soluble in water

d)

Neutral compounds

6.

Alkenes burn with more …… flame compared with alkanes of the same number of carbon atoms because the percentage of carbon by mass in alkenes is ……

a)

blue, higher

b)

sooty, higher

c)

sooty, lower

d)

blue, lower

7.
a)

I and II

b)

I and IV

c)

II and III

d)

II and IV

8.
a)

A

b)

B

c)

C

d)

D

9.
a)

A

b)

B

c)

C

d)

D

10.
a)

A

b)

B

c)

C

d)

D

11.
a)

A

b)

B

c)

C

d)

D

12.
a)

A

b)

B

c)

C

d)

D

13.
a)

True

b)

False

14.

The first member of the alkene series is methene.

a)

True

b)

False

15.

Both alkanes and alkenes react rapidly with aqueous bromine at room temperature (dark condition)

a)

True

b)

False

16.

The "ene" ending in "alkene" tells someone that they are dealing with _________-bonded carbons

a)

single

b)

double

c)

triple

d)

quadruple

17.
a)

A

b)

B

c)

C

d)

D

18.

Which structural formula represent unsaturated hydrocarbon?

a)

A

b)

B

c)

C

d)

D

19.

Give the name of this compound...

C3H6?

a)

Propene

b)

Butane

c)

Butene

d)

Propane

20.

Which of the following is not a chemical properties of alkenes?

a)

combustion

b)

substitution

c)

addition reaction

d)

polymerisation

21.

Ethene reacts with acidified potassium manganate(VII) solution to form a product.

What is the name of this reaction ?

a)

halogenation

b)

oxidation

c)

hydration

d)

hydrogenation

22.

What is the condition for hydration of butene?

a)

Nickel or platinum, 180 oC

b)

1000atm, 200 oC

c)

room temperature

d)

phosphoric acid, 60 atm, 300 0C

23.

Ethene reacts with acidified potassium manganate (VII) solution for form W.

What is W?

a)

ethanol

b)

ethane

c)

ethene-1,2-diol

d)

ethane-1,2-diol

24.

Alkenes react with excess oxygen to form

a)

carbon dioxide and water

b)

salt and water

c)

carbon monoxide and soot

d)

metal hydroxide and hydrogen

HIDE ANSWER

25.

Possible products of INCOMPLETE combustion of alkene are

** can choose more than one answer

a)

Carbon (C)

b)

Carbon Monoxide (CO)

c)

Carbon Dioxide (CO2)

d)

Water (H2O)

26.

Which of the following would have the highest melting point?

a)

C2H6

b)

C3H6

c)

C5H12

d)

C6H12

27.

Which of the following can be used to distinguish between alkanes and alkenes?

a)

add a few drops of potassium manganate(VII) solution

b)

add a few drops of Universal indicator

c)

add a few drops of bromine water under sunlight

d)

add a piece of red litmus paper

28.

Which of the following statement is correct?

a)

Alkenes can turn aqueous bromine from blue -brown to colourless.

b)

Alkenes can turn aqueous bromine from green to colourless.

c)

Alkenes can turn aqueous bromine from reddish-brown to colourless.

d)

Alkenes can turn aqueous bromine from colourless to reddish-brown.

29.

Which of the following reactions apply to alkenes only?

a)

combustion

b)

substitution

c)

addition

30.

Which of the following shows the structure of ethene?

a)
b)
c)
d)
31.

Which of the following statements concerning propene is/are correct?

(1) It dissolves in water to form propan-1-ol.

(2) It can undergo addition polymerization.

(3) It can be prepared by the catalytic cracking of a saturated hydrocarbon.

a)

(1) only

b)

(1) and (3) only

c)

(2) and (3) only

d)

(2) only

32.

The model as shown represents a compound containing 6 hydrogen atoms (white spheres) and 3 carbon atoms

(black spheres). Which of the following statements concerning the compound is INCORRECT?

a)

Its structural formula is C3H6.

b)

It can decolorize bromine water in dark condition

c)

It can undergo polymerization.

33.

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

(1) It is an addition reaction.

(2) It is a substitution reaction.

(3) A similar reaction will occur if propene is used instead of ethene.

a)

(1) only

b)

(2) only

c)

(1) and (3) only

d)

(2) and (3) only

34.

Which of the following statements concerning the compounds C2H4, C3H6 and C4H10 is correct?

a)

They belong to the same homologous series.

b)

They belong to the same homologous series.

c)

They are gases at room temperature and pressure.

d)

They have the same physical properties.

35.

A compound has the structure as shown: Which of the following statements about this compound are correct?

(1) It can decolorize bromine water.

(2) It can be polymerized.

(3) It can burn in air.

a)

(1) & (2) only

b)

(1) & (3) only

c)

(2) & (3) only

d)

(1), (2) & (3)

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