Advertisements
Advertisements
Question
Which of the following materials is not lustrous?
Options
Gold
Silver
Wood
Diamond
Solution
Wood
Explanation -
Wood is not a crystalline substance and has no lusture.
APPEARS IN
RELATED QUESTIONS
Very Short Answer Type Question:
Why do we need to group materials? Give one reason.
Very Short Answer Type Question:
Select a lustrous material out of the following substances.
Very Short Answer Type Question:
Which material is generally used for making pens? Wood, aluminum, plastic, cotton
Very Short Answer Type Question:
Name two objects which are made from opaque materials.
Materials which can be compressed or cut easily are called _______.
Sand paper is a good example for smooth materials.
Test the flexibility.
Give one plastic scale and a wooden scale to the students. Ask them to bend. Tabulate their observation (bends, does not bend).
| Plastic Scale | Wooden Scale |
| ______ | ______ |
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.
Differentiate among opaque, translucent and transparent materials, giving one example of each.
