If materials dissolve completely in water, they are said to be soluble materials. What about other liquids such as vinegar, cough syrups, kerosene oil, vegetable oil, petrol and lemon juice? Do they dissolve completely in water? Try dissolving these things in water.
Which among these do not dissolve in water?
Important Questions on Grouping Materials
Fill in the blank with the words given in the box.
| Smooth | Translucent | grouping | metals | lustrous | turbid | wood |
Sorting material into different categories is called _____ materials.
Fill in the blank with the words given in the box.
| Smooth | Translucent | grouping | metals | lustrous | turbid | wood |
Materials that have good shine are called _____ materials.
Fill in the blank with the words given in the box.
| Smooth | Translucent | grouping | metals | lustrous | turbid | wood |
Most _____ are highly lustrous.
Fill in the blank with the words given in the box.
| Smooth | Translucent | grouping | metals | lustrous | turbid | wood |
Silk is an example of a _____ material.
Fill in the blank with the words given in the box.
| Smooth | Translucent | grouping | metals | lustrous | turbid | wood |
A _____ solution indicates that the material has not dissolved completely in the water.
Fill in the blank with the words given in the box.
| Smooth | Translucent | grouping | metals | lustrous | turbid | wood |
_____ floats on water.
_____ materials allow partial light to pass through them.
