Advertisements
Advertisements
Question
Which of the following statements is not true?
Options
Materials are grouped for convenience.
Materials are grouped to study their properties.
Materials are grouped for fun.
Materials are grouped according to their uses.
Advertisements
Solution
Materials are grouped for fun.
Explanation:
Materials are not grouped for fun. They are grouped for convenience, to study their properties and according to their uses in systematic manner.
APPEARS IN
RELATED QUESTIONS
Short Answer Type Question:
What is the basis for sorting materials?
Long Answer Type Question:
‘Grouping of objects helps the shopkeeper.’ Justify the statement.
Find the odd one.
brick, coir, silk cloth, pine apple
Sand paper is a good example for smooth materials.
Materials which have ups and downs on their surface are called ______.
Some of the following statements are incorrect. Find the incorrect statements and correct them.
- The property of metals by virtue of which they can be drawn into wires is called ductility.
- Metals are good conductors of electricity but poor conductor of heat.
- Articles made up of metals produce ringing sound when struck hard.
- Oxides of non-metals and metals are acidic in nature.
- A less reactive metal displaces a more reactive metal from its salt solution in water.
Fill in the blanks to complete the following paragraph.
The name of the product formed in the reaction of sulphur and ______ is sulphur dioxide gas. When sulphur dioxide is dissolved in ______, sulphurous acid is formed. The sulphurous acid turns ______ litmus paper to ______. Generally oxides of ______ are acidic in nature.
After completing the paragraph, write two questions which you can raise on the basis of this information.
Boojho found a bag containing the following materials
- Mirror
- Paper stained with oil
- Magnet
- Glass spectacles
Help Boojho in finding out the material(s) which is/are opaque.
Which pair of substances among the following would float in a tumbler half filled with water?
Differentiate among opaque, translucent and transparent materials, giving one example of each.
