(1) Components retain their properties in a ____________.

(2) Compounds have ____________ melting points.

(3) Sugarcane juice is a mixture of ____________ water and many other substances

(4) Separation of components is done to obtain a ____________ substance.

(5) Boiling point of pure water is ____________ than that of impure water.

(1) A pure substance has a fixed melting and boiling point

(2) Elements are pure substances.

(3) Separation of components of a mixture is a useful process.

(4) Rocks are pure substances.

(5) Tap water and pond water are alike.

(1) What is mixture?

(4) What type of mixtures are separated by evaporation?

(2) Name the method used to separate husk from Wheat.

(3) What is the drawback of evaporation?

(5) Describe the method to obtain pure salt from rock salt.

(3) Write the characteristics of mixture.

(1) Give two examples of each of the following types of mixture: (a) Solid – Solid (b) Solid – Liquid (c) Liquid – Gas

(2) Write the composition and use of each of the following: (a) Brass (b) Bronze (c) Solder

(4) Write the opposite process of condensation.

(5) How will you separate pure water from a solution?

(1)  Classify the following into element, mixture and compound: (a) Sodium (b) Soil (c) Sugar solution (d) Silver (e) Calcium carbonate

(2) Write the four differences between mixture and compound.

(3) Write the definitions of the following. (a) Alloy (b) Homogeneous mixture (c) Impure substance (d) Solution (e) Solute (f) Solvent

(4) Name the property of the component used for separating each of the following: (a) Salt and Camphor (b) Wheat and husk (c) Iron fillings and sulphur

(5) Why do we need to separate different components of a mixture? Give two examples.

both (a) and(b)

filtration

all of these

evaporation

sieving

filtration