Give reasons for the following statements:
(a) Phosphorus is kept under water.
(b) Sodium and potassium are kept immersed under kerosene oil.
(c) Gold, Platinum and Silver are used to make jewellery.
Answers
Questions and answers:
a) Phosphorus is kept under water.
Phosphorus is kept under water as it is a highly reactive non-metal and reacts vigorously when it comes in the contact with air. So to prevent this reaction, phosphorus is kept under the water.
b) Sodium and potassium are kept immersed under kerosene oil.
Sodium and potassium are the two metals that are kept immersed under kerosene because both of them are very reactive metals and react vigorously with water as well as air. So in order to prevent this reaction, potassium and sodium are kept under kerosene as kerosene doesn't allow air or water to react with sodium and potassium.
c) Gold, platinum and silver are used to make jewellery.
Gold, silver and platinum are very lustrous (shiny) metals and this is one of the properties of metals. Gold, silver and platinum are used to make jewellery because they are very lustrous. This property of lustre attracts the customers towards buying the jewelries and makes them more expensive.
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⭐More to know about
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Elements and symbols:
- Aluminum --> Al
- Argon --> Ar
- Barium --> Ba
- Boron --> B
- Bromine --> Br
- Calcium --> Ca
- Carbon --> C
- Chlorine --> Cl
- Copper --> Cu
- Gold --> Au
- Hydrogen --> H
- Iodine --> I
- Iron --> Fe
- Lead --> Pb
- Magnesium --> Mg
- Nitrogen --> N
- Oxygen --> O
- Potassium --> K
- Silver --> Ag
- Sodium --> Na
- Sulphur --> S
- Uranium --> U
- Zinc --> Zn
a) Phosphorus is kept under water.
Phosphorus is kept under water as it is a highly reactive non-metal and reacts vigorously when it comes in the contact with air. So to prevent this reaction, phosphorus is kept under the water.
b) Sodium and potassium are kept immersed under kerosene oil.
Sodium and potassium are the two metals that are kept immersed under kerosene because both of them are very reactive metals and react vigorously with water as well as air. So in order to prevent this reaction, potassium and sodium are kept under kerosene as kerosene doesn't allow air or water to react with sodium and potassium.
c) Gold, platinum and silver are used to make jewellery.
Gold, silver and platinum are very lustrous (shiny) metals and this is one of the properties of metals. Gold, silver and platinum are used to make jewellery because they are very lustrous. This property of lustre attracts the customers towards buying the jewelries and makes them more expensive.