MEDIUM
MYP:4-5
IMPORTANT
Earn 100

Creamy mayonnaise is an emulsion of oil and water. Identify the role of adding a small amount of egg yolk or mustard powder in the recipe.

Important Questions on How Do We Use Matter?

MEDIUM
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 6

Calculate the Rf values for green coloured spots in the below figure.

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MEDIUM
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 6

Calculate the Rf values for yellow coloured spots in the below figure.

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MEDIUM
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 6

Calculate the Rf values for blue coloured spots in the below figure.

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HARD
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 7
Some creams are called vanishing because they seem to disappear when rubbed on the skin. Suggest the type of oil and water combination that would give a vanishing cream emulsion with this property.
MEDIUM
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 8
During their use perfumes often present a range of impressions. After a first fleeting scent, there can be a range of different lingering impressions. Make a scientifically supported judgement to explain how this is possible.
MEDIUM
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 9
At a party in a bucket of iced water(i.e.containing both liquid and solid phase of water) you notice that cans of a regular soda sink, but cans of diet soda float. In the morning when all the ice cubes have melted the regular Coca-Cola and regular Dr Pepper drinks both float along with the diet sodas. Interpret this information and make scientifically supported judgements.  
HARD
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 10
Describe how a separating funnel can be used to differentiate between liquids of different densities?
HARD
MYP:4-5
IMPORTANT
MYP By Concept 4&5 Chemistry>Chapter 2 - How Do We Use Matter?>SOME SUMMATIVE PROBLEMS TO TRY>Q 11
When clothes are washed, suggest why it is difficult to remove grease spots from clothing using pure water?