IS MATTER AROUND US PURE

Name the mixture whose particles are large enough to scatter light:

• True solution

• Homogenous solution

• Colloid

• all of the above

Smell of Hydrogen sulfide gas

• rotten eggs

• burning tyre

• pleasant

• sweet

___________ is the non-metal which is in liquid state at room tempearture.

Which of the following techniques is used in diagnostic lab for blood and urine test:

• Sublimation

• Crystallization

• Centrifugation

• Evaporation

Which of the following is a chemical change?

• cooking food

• melting of wax

• dissolving sugar in water

• mixing iron fillings with sulfur powder

The continuous zig-zag movement of colloidal particles in a dispersion medium is called:

• Oscillation

• Tyndall effect

• Dispersion

• Brownian movement

A colloid with a solid dispersed phase and liquid dispersing medium is called __________.

Which of the following is a true solution?

• Blood

• Milk

• Chalk powder in water

• Salt solution

___________ technique can be used to separate different components of chlorophyll.

We can separate crystals of alum from impure samples through ___________ method.