Classification of Objects

During the preparation of lemonade, sugar should first be dissolved in warm water and then the ice cubes should be added. What will happen if the above steps are followed in reverse order?

Sudden discharge of hot water from industries into the waterbodies results in the death of aquatic animals. Why?

Liquid A is heavier than liquid B but is lighter than Liquid C. When these three liquids are mixed together, then which one will form the lowermost layer and which one will form the uppermost layer? (Note: The three liquids do not dissolve in each other.)

Look at the following group of materials and identify the property on the basis of which the classification has been done.

List any three properties on the basis of which we can classify the substances. Give two examples of each category.

Give differences between solids, liquids and gases on the basis of following property:

Packing of particles

Give differences between solids, liquids and gases on the basis of the following property:

Volume

Give differences between solids, liquids and gases on the basis of following property:

Compressibility

Define the following term:

Solubility

Define the following term:

Magnetism

Define the following term:

Immiscible substances

Define the following term:

Transparency

If oil is mixed with water, which one will form the upper layer and why?

Differentiate between:

Transparent and translucent materials

Differentiate between:

Conductors and insulators

Differentiate between:

Lustrous and non-lustrous materials

Differentiate between:

Miscible and Immiscible liquids

What is the advantage of solubility of oxygen gas in water for the aquatic organisms?

Why liquid do not have a fixed shape but have a fixed volume?

What is the importance of grouping substances?