Sorting Materials Into Groups

Which of the following statements is not true?

• Materials are grouped for convenience.

• Materials are grouped to study their properties.

• Materials are grouped for fun.

• Materials are grouped according to their uses.

Which of the following will dissolve in water

• Metal

• Chalk

• paper

• oxygen

Which of the following materials is suitable to make raincoats?

• Cotton

• Plastic

• Silk

• Paper

A mirror is

• opaque.

• transparent

• translucent.

• flexible

Which characteristics given below are of metals?

(i) They are hard.

(ii) They have lustre.

(iii) They are good conductors of electricity

• Only (i)

• Only (ii) and (iii)

• Only (i) and (iii)

• i), (ii) and (iii)

The property of a substance by which it dissolves in water is

• Transparency

• Hardness

• flotation

• solubility

An oiled paper act as a _______ material.

• transparent

• translucent

• opaque

• no idea

which of the following floats on water ? (You can select multiple answers to this question, if needed)

• stone

• wood

• metal

• oil

• plastic

sand and water is a soluble solution .

• true

• false

Take two samples, one is oil and other is water. Mix the two. You observe that

• They are soluble.

• Oil floats on water

• Water floats on oil

• None of the above