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प्रश्न
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
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उत्तर
1. Metals and their uses in our houses & schools :
- Magnesium is used in the laboratory as magnesium ribbon.
- Copper is used cooking utensils.
- Zinc is mainly used as a protective coat for iron is our school and house gates.
- Aluminum is used as cooking utensils and electrical cables which are used in our schools and houses.
- Iron and steel are widely used is construction of house and school.
- Sodium is used as a table salt and for flavoring, preserving food.
- Coins are made up of nickel.
- Lead is used in car batteries. Lead based alloys find extensive use in printing
2. Non-metals and their uses in houses & school:
- Oxygen is essential for the breathing. It is used as oxidising agent in laboratory. Chlorine is used for purifying water.
- Graphite is used in pencil leads.
- Carbon is used as a fuel.
- Bromine is used in dyes.
- Iodine is used in laboratory to test for starch.
3. Metalloids and their uses in houses & schools :
- Silicon is used in glass items.
- Antimony is used in optical discs.
- Tellurium is used in solar cells.
- Boron is used in washing powders.
- Germanium is used to make transistors which is used in laboratory in electrical devices.
4. Comparsion of properties of metals, non-metals & metalloids
| Metals | Non-metals | Metalloids |
| They have lustre | They are not lustrous | Intermediate |
| Conduct heat and electricity | Poor conductors of electricity except graphite | Intermediate (semiconductors) |
| They are malleable and ductile | They are neither malleable nor ductile. | Intermediate |
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संबंधित प्रश्न
Give two examples of Metals.
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Fill in the blank
A metal which is a poor conductor of electricity is _______.
Indicate whether the following statement is true or false:
All elements are artificially prepared
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Complete the statement given below by filling in the blank with the correct word.
From the elements nitrogen, chlorine, bromine, the element present in the atmosphere is ________.
Select the correct answer from the choice given below.
An element which is a poor conductor of heat
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
Elements are the______ form of pure substances.
Classify the following as metals, non-metals and metalloids.
Sodium, Bismuth, Silver, Nitrogen, Silicon, Carbon, Chlorine, Iron, Copper
