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प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
उत्तर
Sodium and potassium are stored in kerosene because they are highly reactive elements. They can easily catch fire even when in contact with air.
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संबंधित प्रश्न
Name an alloy of lead and tin.
State two important uses of following metal
Uses of copper
State the position of the following in the periodic table:
Alkali metals
Give the general characteristics of:
Alkaline earth metals with reference to
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Write name.
Molecular formula of the common ore of aluminium.
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
What is ductility?
Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?
The metals which are found in both free state as well as combined state are ______.
