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प्रश्न
Name the metal which is the best conductor of heat and electricity.
उत्तर
Silver is the metal which is the best conductor of heat and electricity.
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संबंधित प्रश्न
Give an example of a metal which is a liquid at room temperature.
Name two metals which are both malleable and ductile.
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water.
Name:
a metal which can be cut with a knife.
Name:
a non-malleable metal
Name:
two metals which are soft
Give the balanced reactions for the following:
Sodium is dropped in water
From the list of characteristics given below, select the five which are relevant to non-metals and their compounds:
- Ductile
- Conduct electricity
- Brittle
- Acidic Oxides
- Basic Oxides
- Discharged at anode
- Discharged at cathode
- Ionic chlorides
- Covalent chlorides
- Reaction with dilute sulphuric acid yields hydrogen
- 1, 2 or 3 valence electrons
- 5, 6, 7 valence electrons
(Write the five letters corresponding to the correct characteristics).
How are metals like sodium, potassium, and calcium obtained? Give equations.
Match the following:
| 1. | Non-metals | a. | Silicon |
| 2. | Metals | b. | fire extinguisher |
| 3. | Metalloids | c. | dull and soft |
| 4. | Oxygen | d. | hard and shiny |
| 5. | Water | e. | supports fire |
