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प्रश्न
Give reasons
Aluminium is used in making aircrafts.
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उत्तर
Aluminium is used in making aircrafts because it is light and strong. It is mixed with other metals to make it stronger.
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संबंधित प्रश्न
State one use of Iron.
State one use of Silver.
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
How are the properties of an alloy different from those of the constitutent elements?
Fill in the blank
_______ is a soft metal.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
______ is a liquid metal.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
Salt of silver, such as ________ is used for making photographic films.
Name a metal which is not malleable :
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Hydrochloric acid,
What is it made from? Why?
Electric cables
With reference to the following metals state their use in daily life metal:
Zinc
The minerals from which the metal can be separated economically are called _______.
Which one of the following is an example for a metal?
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Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)
Which of the following is not a metal?
Metals have high melting points.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
