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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
Select those objects from the following which shine:
Glass bowl, plastic toy, steel spoon, cotton shirt
Chalk dissolves in water.
Sand settles down in the water.
Choose the odd one:
Which among the following is an example of dull material?
Match the substances in Column A with their applications given in Column B.
|
Column A |
Column B |
| (a) oxygen | (i) for making crackers |
| (b) copper | (ii) for disinfecting water |
| (c) sulphur | (iii) all living beings inhale during breathing |
| (d) iron | (iv) for making electric wires |
| (e) chlorine | (v) for making rails |
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 of the following statements is not true?
Differentiate among opaque, translucent and transparent materials, giving one example of each.
