Give any one point of difference between true solution, colloidal solution and suspension.

What would you observe when: A saturated solution of potassium chloride prepared at 60°C is allowed to cool to room temperature.

Classify the following into solution, suspensions and colloids: Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.

Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.

State two reasons for supposing that brass is a mixture and not a compound.

What do you observe in the china dish during crystallization?

Separate the following into physical and chemical changes:
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water.

Classify the following as physical or chemical properties:
Most metal oxides form alkalis on interacting with water.

Classify the following into true solutions and colloidal solutions: Ink, Salt solution, Starch solution, Blood, Sugar solution.

Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Will it be a pure substance or a mixture? Give reasons for the same.