Soap

what is the main source in the production of detergent?

• palm oil

• animal fat

• ammonia

• petroleum

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?

• soap

• bleach

• detergent

• antiseptic

a child spilled curry gravy on his school uniform. the stain was very hard to be removed after being washed with a type of detergent.

which additive should be added to a new detergent to make sure the stain can be removed?

• protease

• sodium silicate

• sodium carbonate

• fluorescent dyes

which of the following are used to make detergents?

• I and II

• II and III

• III and IV

• I and III

Tags

NGSS.MS-PS1-3

which cation present in hard water?

• Mg2+

• Zn2+

• Pb2+

• Sn2+

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?

• soap is less soluble in hard water

• soap dissociates partially in hard water

• soap forms insoluble salt with calcium and magnesium ions

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

why sodium chloride used in preparation of soap?

• to speed up the reaction to produce soap

• to produce soap with foams easily

• to reduce the solubility of soap

• to make soap softer

name the process of soap preparation

• hydrolysis

• soapication

• sulphonation

• saponification

two cleaning agents, soap and detergent are used to wash clothes in sea water and river water.

which of the following pair is correct about the result obtained?

• I and II

• I and IV

• II and III

• III and IV

Tags

NGSS.MS-PS1-2

Which statement is correct about cleansing action of soap?

• The hydrophilic part of soap molecules dissolves in water

• Increases the surface tension of water

• Soap molecules emulsify water

• Reacts with acids to form salt