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प्रश्न
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
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उत्तर
Silver is best conductor of electricity.
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संबंधित प्रश्न
What happens when Iron nails are placed in copper sulphate solution?
Write word equations of the reactions involved.
A metal having low melting point is ______ but a non-metal having very high melting point is ______.
Name an alloy of lead and tin.
What is an amalgam?
Aluminium is not used to make :
State two important uses of following metal:
Uses of aluminium
State the position of the following in the periodic table:
Iron and zinc
Write scientific reason.
Sodium is always kept in kerosene.
Write scientific reason.
Pine oil is used in froth flotation.
Give a reason why a green deposit is seen on the surface of an article of copper
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
______ is the first scientist who used the term element.
In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.
- ______ is a metal.
- Metals are good ______ of electricity.
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
Why are metalloids called semimetals?
The metals which are found in both free state as well as combined state are ______.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
