The World of Metals and Non metals Class 7 Fill in the Blanks
hardThe World of Metals and Non metals Class 7 Fill in the Blanks
The World of Metals and Non metals Class 7 Fill in the Blanks
Question 1.
............ is the process that protects iron from rusting using zinc.
Answer:
Galvanisation
Question 2.
When iron reacts with oxygen and moisture, it undergoes ............ .
Answer:
rusting
Question 3.
Non-metals are often ............ in nature, meaning they break easily.
Answer:
brittle
Question 4.
Sustainability promotes ............ balance and resource management.
Answer:
ecological
Question 5.
............ nutrients are vital for the growth of living organisms.
Answer:
Essential
The World of Metals and Non metals Class 7 True or False
Question 1.
Metals are generally poor conductors of heat and electricity.
Answer:
False
Question 2.
Non-metals are typically shiny and lustrous.
Answer:
False
Question 3.
Malleability refers to the ability of a material to be drawn into wires.
Answer:
False
Question 4.
Corrosion is the gradual destruction of materials, usually metals, due to chemical reactions with their environment.
Answer:
True
Question 5.
Oxides formed when metals react with oxygen are basic in nature.
Answer:
True
The World of Metals and Non metals Class 7 Match the Following
Question 1.
| Column A (Use) | Column B (Substance) |
| (a) Used in electrical wiring | (i) Nitrogen |
| (b) Most malleable and ductile | (ii) Gold |
| (c) Essential for living organisms | (iii) Chlorine |
| (d) Helps plants grow when added to soil | (iv) Copper |
| (e) Used in water purification | (v) Oxygen |
Answer:
| Column A (Use) | Column B (Substance) |
| (a) Used in electrical wiring | (iv) Copper |
| (b) Most malleable and ductile | (ii) Gold |
| (c) Essential for living organisms | (v) Oxygen |
| (d) Helps plants grow when added to soil | (i) Nitrogen |
| (e) Used in water purification | (iii) Chlorine |
Question 2.
| Column A (Metal) | Column B (Property) |
| (a) Aluminium | (i) Good conductor of heat |
| (b) Sodium | (ii) Forms rust when exposed to air and moisture |
| (c) Copper | (iii) Highly malleable and ductile |
| (d) Iron | (iv) Catch the fire when reacts with water |
| (e) Gold | (v) Good conductor of electricity |
Answer:
| Column A (Metal) | Column B (Property) |
| (a) Aluminium | (i) Good conductor of heat |
| (b) Sodium | (iv) Catch the fire when reacts with water |
| (c) Copper | (v) Good conductor of electricity |
| (d) Iron | (ii) Forms rust when exposed to air and moisture |
| (e) Gold | (iii) Highly malleable and ductile |