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LEMAK DAN GETAH

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Natural rubber also known as / Getah asli juga dikenali sebagai...

a)

Polyisoprene / Poliisoprena

b)

Poly-2-methylbutene / Poli-2-metilbutena

c)

Polysacharide / Polisakarida

d)

Polypeptide / Polipeptida

2.

Which of the following is true? Yang manakah di antara berikut adalah benar?

a)

Vulcanised rubber is softer than unvulcanised rubber / Getah tervulkan lebih lembut daripada getah tak tervulkan

b)

Unvulcanised rubber is less elastic than vulcanised rubber / Getah tak tervulkan kurang kenyal daripada getah tervulkan

c)

Unvulcanised rubber is stronger than vulcanised rubber / Getah tak tervulkan lebih kuat daripada getah tervulkan

3.

Vulcanisation is

Pemvulkanan ialah

a)

A process whereby a substance in aqueous solution is decomposed into its constituent elements.

Proses di mana bahan dalam keadaan larutan akueus diuraikan kepada unsur juzuknya.

b)

A reaction between an acid and an alkali to produce salt and water.

Tindak balas di antara asid dan alkali untuk menghasilkan garam dan air.

c)

A process of adding sulphur to natural rubber molecules.

Proses penambahan sulfur kepada molekul-molekul getaj asli

d)

A process of converting liquid fat into solid fat.

Proses penukaran lemak cecair kepada lemak pepejal.

4.

Which of the following is not the uses of natural rubber?

Yang manakah bukan kegunaan getah asli?

a)

To produce rain coat

Membuat baju hujan

b)

To produce tyre

Membuat tayar

c)

To produce rubber band

Membuat gelang getah

d)

To produce gloves

Membuat sarung tangan

5.

Which of the following is not a reason for vulcanisation?

Yang manakah bukan sebab untuk pemvulkanan?

a)

To improve the elasticity of rubber

Menambah kekenyalan getah

b)

To improve the strength of rubber

Menambah kekuatan getah

c)

To improve the hardness of rubber

Menambah kekerasan getah

d)

To produce a rubber that is easily oxidised

Menghasilkan getah yang mudah dioksidakan

6.

When sulphur is added,

Apabila sulfur ditambah,

a)

The rubber becomes softer

Getah menjadi lembut

b)

The rubber becomes less elastic

Getah menjadi kurang elastik

c)

The rubber becomes less resistant to heat

Getah menjadi kurang tahan terhadap haba

d)

The rubber cannot oxidised easily

Getah tidak mudah teroksida

7.

The following substances can prevent latex from coagulates, except

Bahan berikut boleh menghalang lateks daripada menggumpal, kecuali

a)

Vinegar

Cuka

b)

Dilute sodium hydroxide solution

Larutan natrium hidroksida cair

c)

Ammonia solution

Larutan ammonia

8.

What is the function of sulphur in vulcanised rubber?

a)

Rubber can return to its original shape after being stretched

Getah boleh kembali ke rupa asal selepas diregang

b)

Rubber becomes longer than its original shape after being stretched

Getah menjadi lebih panjang daripada asal selepas diregang

c)

Rubber can be melts easily when exposed to heat

Getah mudah untuk cair apabila terdedah kepada haba

9.

Which substance is used to prevent coagulation of lates?

Bahan manakah yang boleh diguna untuk menghalang penggumpalan lateks?

a)

Ethanoic acid

Asid etanoik

b)

Methanoic acid

Asid metanoik

c)

Ethyl ethanoate

Etil etanoat

d)

Ammonia solution

Larutan ammonia

10.

How hydrochloric acid can cause coagulation of latex?

a)

Hydroxide ion neutralised the negatively-charge protein membrane of rubber particles.

Ion hidroksida meneutralkan membran protein getah yang bercas negatif

b)

Hydrogen ion neutralised the negatively-charge protein membrane of rubber particles.

Ion hidrogen meneutralkan membran protein getah yang bercas negatif

c)

Hydrogen ion neutralised the positively-charge protein membrane of rubber particles.

Ion hidrogen meneutralkan membran protein getah yang bercas positif

11.

Tyre and rubber shoes are made of

Tayar dan kasut getah diperbuat daripada

a)

Vulcanised rubber

Getah tervulkan

b)

Natural rubber

Getah asli

c)

Polyvinyl chloride

Polivinil klorida

12.

Name the process of adding sulphur to natural rubber. Is the process good for industry?

Namakan proses penambahan sulfur kepada getah asli. Adakah proses itu baik untuk industri?

a)

Hydrogenation. Yes

Penghidrogenan. Ya

b)

Neutralisation. No

Peneutralan. Tidak

c)

Esterification. Yes

Pengesteran. Ya

d)

Vulcanisation. Yes

Pemvulkanan. Yes

13.

Based on the information in the table, which rubber strip is vulcanised rubber? Berdasarkan maklumat dalam jadual, jalur getah manakah ialah getah tervulkan?

a)

Rubber band A

Jalur getah A

b)

Rubber band B

Jalur getah B

14.
a)

A

b)

B

c)

C

d)

D

15.
a)

A

b)

B

c)

C

d)

D

16.
a)

A

b)

B

c)

C

d)

D

17.
a)

A

b)

B

c)

C

d)

D

18.
a)

A

b)

B

c)

C

d)

D

19.
a)

A

b)

B

c)

C

d)

D

20.
a)

A

b)

B

c)

C

d)

D