Quiz 5 Sem 2 2008-set A

SK027 Topical Test 2 (Set A) Session 2008/2009

Perak Matriculation College Chemistry Unit Session 2008/2009 Semester 2 Quiz 5 (40 minutes)

20 25

NAME

: ________________________________________________

MATRIC. NUMBER

: ________________________________________________

CLASS

: ________________________________________________

NAME OF TUTOR

: _____________________________________________

ANSWER ALL QUESTIONS. 1. (i) Write the structural formula of the following organic compound. 2,3,5,6-tetranitrobenzoic acid

(ii) Give the IUPAC names of the following compounds. a)

NO2 Br CH3 c)

Chemistry Unit KMPk 2008/09

1

SK027 Topical Test 2 (Set A) Session 2008/2009

CH2CHCH3 CH3

(3 marks) 2. Complete the following reaction scheme:

O CH3C

COOH Cl

H2SO4 ,

AlCl3

HNO3

Br2 , FeBr3

CH3Cl ,

,

AlCl3

(4 marks)

Chemistry Unit KMPk 2008/09

2

SK027 Topical Test 2 (Set A) Session 2008/2009

3. By giving suitable chemical equation(s), show how (a) benzoic acid can be synthesized from benzene

(b) m-chloronitrobenzene can be synthesized from benzene

( 6 marks)

Chemistry Unit KMPk 2008/09

3

SK027 Topical Test 2 (Set A) Session 2008/2009

4. By giving suitable chemical reactions, explain how the following pair of compounds can be differentiated in the laboratory. from

cyclohexane

benzene

[4 marks]

5. Which compound between benzoic acid and methylbenzene, will have higher rate of nitration when reacted with HNO3/H2SO4 at 55oC? Explain. [3 marks]

~ END OF QUESTION PAPER~ Chemistry Unit KMPk 2008/09

4

SK027 Topical Test 2 (Set A) Session 2008/2009

Set A No

sec

Answer

Marks

1. CH2CH2OH

a)

NO2

b)

NO2

COOH 1 NO2

NO2

(ii) (a) 4-bromo-3-nitrotoluene @ 1-bromo-4-methyl-2-nitrobenzene (b) isobutylbenzene

COOH

O

O

CH3C

C 2.

CH3

COOH

1 1

COOH H2SO4 ,

Cl

AlCl3

HNO3 ,

Br2 , FeBr3

CH3Cl ,

NO2

AlCl3

COOH

COOH 1+1+1 +1

Br

CH3Cl AlCl3 3.

CH3

CH3

KMnO4 , OHH+

COOH

heat

(a) 1+1

Chemistry Unit KMPk 2008/09

5

SK027 Topical Test 2 (Set A) Session 2008/2009

CH3

(b)

Br2

CH4

4.

CH3Br

uv

1+1

AlBr3

BROMINE TEST Br +

Br2

1

CH2Cl2 uv

1

Observation : The reddish brown solution of bromine is decolorized .

+

Br2

CCl4

no reaction

1

benzene 1

Observation : The reddish brown solution of bromine remain unchanged

5 COOH

COOH + HNO3

H2SO4

NO2 1

- COOH is deactivating group

Chemistry Unit KMPk 2008/09

6

SK027 Topical Test 2 (Set A) Session 2008/2009

CH3

CH3

CH3 + HNO3

H2SO4

NO2

+ 1

NO2 -

CH3 activating group.

Therefore: CH3

COOH

react faster with HNO3 / H2SO4 @ 25oC compare to

1

TOTAL

Chemistry Unit KMPk 2008/09

7

20