Because "like dissolves like" eg. polar substances dissolve polar substances. Mothball powder, margarine, and kerosene are all non-polar. Water however is polar, so the mothball powder and margarine cannot dissolve in it.
Coco powder doesn't dissolve because of the density.
Talcum powder is insoluble in water.
Soluble ones.
Normally is soluble.
Yes, it does.
Coco powder doesn't dissolve because of the density.
The water will change it's color and taste.
no
Talcum powder is insoluble in water.
Iron powder is not soluble in water.
Flour does not dissolve in milk, but it does mix with milk.
It depends on what kind of 'powder' it is.
Backing powder can be dissolved in lemonade.
Yes, If mixed with water!
Soluble ones.
Normally is soluble.
no it doesent