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AGEN PENCUCI SET 1 (WED)

Total questions: 15

Worksheet time: 9mins

Name
Class
Date
1.

what is the main source in the production of detergent?

Apakah sumber utama dalam penghasilan detergen?

a)

palm oil

minyak kelapa sawit

b)

animal fat

lemak haiwan

c)

ammonia

ammonia

d)

petroleum

petroleum

2.

a group of scouts go camping by the seashore. they have to do all their washing using sea water.

what is the suitable substance for them to wash their clothes effectively?

Sekumpulan pengakap menyertai perkhemahan di tepi pantai.Mereka perlu menggunakan air laut untuk mencuci.Apakah bahan yang sesuai digunakan untuk mencuci pakaian mereka dengan berkesan?

a)

soap

sabun

b)

bleach

peluntur

c)

detergent

detergen

d)

antiseptic

antiseptik

3.

which cation present in hard water?

Kation manakah yang hadir di dalam air liat?

a)

Mg2+

b)

Zn2+

c)

Pb2+

d)

Sn2+

4.

the effectiveness of cleansing action of soap is lower in hard water compared to in soft water.

which of the following explain the above statement?

Keberkesanan tindakan pencucian bagi sabun adalah lebih rendah di dalam air liat berbanding air lembut.Yang manakah antara berikut menerangkan kenyataan di atas?

a)

soap is less soluble in hard water

sabun kurang larut di dalam air liat

b)

soap ionise partially in hard water

sabun mengion separa di dalam air liat

c)

soap forms insoluble salt with calcium and magnesium ions

sabun membentuk garam tidak larut dengan ion kalsium dan ion magnesium

d)

soap particles form complex ions with aluminium ion present in hard water

zarah sabun membentuk ion kompleks dengan ion aluminium di dalam air liat

5.

name the process of soap preparation

Namakan proses penyediaan sabun

a)

hydrolysis

hidrolisis

b)

hydrogenation

penghidrogenan

c)

sulphonation

pengsulfonan

d)

saponification

saponifikasi

6.

Which statement is correct about cleansing action of soap?

Kenyataan manakah benar tentang tindakan pencucian sabun?

a)

The hydrophilic part of soap anion dissolves in water

Bahagian hidrofilik anion sabun larut dalam air

b)

Increases the surface tension of water

Meningkatkan ketegangan permukaan air

c)

Soap molecules emulsify water

molekul sabun mengemulsi air

d)

Reacts with acids to form salt

Bertindakbalas dengan asid menghasilkan garam

7.

chemical equation below shows the process of saponification.

minyak + R --> soap + P

Persamaan kimia di bawah menunjukkan proses saponifikasi

minyak + R ----> sabun + P

a)

R-sodium hydroxide, P-water

R- natrium hidroksida , P - air

b)

R-potassium hydroxide, P-glycerol

R- kalium hidroksida , P-gliserol

c)

R-sodium oxide, P-glycerol

R - natrium oksida , P -gliserol

d)

R-fatty acid, P-RCOONa

R- asid lemak , P - RCOONa

8.

What is soap?

Apakah sabun?

a)

Organic acid with long carbon chain

Asid organik dengan rantai karbon yang panjang

b)

Potassium or sodium salt of fatty acid

Garam kalium atau natrium asid lemak

c)

Ester with glycerol

Ester dengan gliserol

d)

Cleansing agent

Agen pencuci

9.

What is alkaline used to prepare soap?

Apakah alkali yang digunakan dalam penyediaan sabun?

a)

Ammonia solution

larutan ammonia

b)

Sodium hydroxide

Natrum hidroksida

c)

Calcium hydroxide

kalsium hidroksida

d)

Barium hydroxide

Barium hidroksida

10.

What are the processes involved in preparation of detergent?

Apakah proses yang terlibat dalam penyediaan detergen?

a)

Esterification and neutralisation

Pengesteran dan peneutralan

b)

Soponification and neutralisation

Saponifikasi dan peneutralan

c)

Sulphonation and neutralisation

Pengsulfonan dan peneutralan

d)

Precipitation and double decomposition

Pemendakan dan penguraian ganda dua

11.

What is the general formula of soap?

Apakah formula am bagi sabun?

a)

RCOO- Na+

b)

RCOOH

c)

RCOOR

d)

RCOO-Ca2+

12.

Which statement is correct?

Kenyataan manakah yang benar?

a)

Soap cation consist of two parts which is hyrophilic and hydrophobic

kation sabun mengandungi dua bahagian iaitu hidrofilik dan hidrofobik

b)

Soap is more effective in hard water

Sabun lebih berkesan di dalam air liat

c)

Soap cation wil form scum when react with Ca2+ ion in hard water

Kation sabun akan menghasil kekat apabila bertindakbalas dengan ion Ca2+ dalam air liat

d)

Detergent is effective as cleansing agent in soft water

Detergen berkesan sebagai agen pencuci di dalam air lembut

13.

What is the function of biological enzyme as additive sunstance in detergent?

Apakah fungsi enzim biologi sebagai bahan tambah dalam detergen?

a)

Convert stain to colourless substance

Menukarkan kotoran kepada bahan tindak berwarna

b)

Drying agent

Agent pengering

c)

Remove protein stain

menyingkirkan kotoran protein

d)

Add fragrance

Menambahkan bau

14.

What is the function of sodium sulphate and sodium silicate in the detergent?

Apakah fungsi natrium sulfat dan natrium silikat di dalam detergen?

a)

Biology enzyme

enzim biologi

b)

whitening agent

agen pemutih

c)

drying agent

agen pengering

d)

Anti suspension agent

anti enapan

15.

Detergent is more effective as a cleansing agent in ............. compare to soap

Detergen lebih berkesan sebagai agen pencuci di dalam..............berbanding sabun

a)

Soft water

air lembut

b)

acidic solution

larutan berasid

c)

hard water

air liat

d)

alkaline solution

larutan alkali