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प्रश्न
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.
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उत्तर
- This statement is True.
- This statement is False.
Correct statement - Metals are good conductors of heat and electricity. - This statement is True.
Correct statement - Because metals are sonorous. - This statement is False.
Correct statement - Oxides of non-metals are acidic in nature and oxides of metals are basic in nature. - This statement is False.
Correct statement - A more reactive metal displaces a less reactive metal from its salt solution in water.
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संबंधित प्रश्न
Very Short Answer Type Question:
Why do we need to group materials? Give one reason.
Very Short Answer Type Question:
List three liquids which are transparent.
Long Answer Type Question:
‘Grouping of objects helps the shopkeeper.’ Justify the statement.
Chalk dissolves in water.
Sugar does not dissolve in water.
Name some examples for shiny materials?
Differentiate hard and soft materials.
Complete the crossword given in the figure with the help of the clues.

Across
1. Which is generally hard, ductile, malleable and sonorous.
2. A metal is called so it can be drawn into wires.
3. Metal bells are used because of this property.
Down
4. A metal generally used for making jewellery.
5. A metal which is liquid at room temperature.
6. A metal which reacts with acid as well as base to form hydrogen gas.
7. Substances used to enhance the growth of plants.
8. Property by virtue of which metals can be beaten into thin sheets.
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 of the following materials is not lustrous?
