Class 7 Exam > Class 7 Notes > Chemistry Class 7 ICSE > Worksheet: Metals and Non-metals
Worksheet: Metals and Non-metals | Chemistry Class 7 ICSE PDF Download
Part A – Multiple Choice Questions (MCQs)
Q1. Metals are generally found in nature in which state?
a) Free state
b) Solid state
c) Liquid state
d) Gaseous state
Q2. Which of the following is the best conductor of electricity?
a) Wood
b) Copper
c) Plastic
d) Glass
Q3. Which gas is essential for respiration in living beings?
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Hydrogen
Q4. Which property is shown by metals but not by non-metals?
a) Brittle
b) Ductile
c) Poor conductor
d) Non-lustrous
Q5. Which of these is a metalloid?
a) Gold
b) Silicon
c) Nitrogen
d) Aluminium
Part B – Short Answer Questions
Q6. Define corrosion. Why is it harmful?
Q7. State two differences between metals and non-metals.
Q8. What conditions are necessary for rusting of iron?
Q9. Write two uses of aluminium. Why is it used in these ways?
Q10. Give one example each of:
(a) Noble metal
(b) Metalloid
(c) Non-metal used in fertilizers
Part C – Long Answer Questions
Q11. List any three physical properties of metals. Give examples.
Q12. How can rusting of iron be prevented?
Q13. Why are gold and platinum called noble metals?
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FAQs on Worksheet: Metals and Non-metals - Chemistry Class 7 ICSE
| 1. What are the main differences between metals and non-metals? |  |
Ans. The main differences between metals and non-metals include their physical and chemical properties. Metals are typically solid at room temperature (with the exception of mercury), are good conductors of heat and electricity, have high melting and boiling points, and are malleable and ductile. In contrast, non-metals can be gases, liquids, or solids, are generally poor conductors of heat and electricity, have lower melting and boiling points, and are brittle in solid form.
| 2. Can non-metals conduct electricity? | |
Ans. Non-metals are generally poor conductors of electricity. However, there are exceptions like graphite, a form of carbon, which can conduct electricity due to the mobility of its electrons. Most non-metals, like sulfur and phosphorus, do not conduct electricity because they lack free-moving electrons.
| 3. What are some common examples of metals and non-metals? | |
Ans. Common examples of metals include iron (Fe), copper (Cu), aluminum (Al), and gold (Au). On the other hand, common non-metals include oxygen (O), nitrogen (N), sulfur (S), and carbon (C). Each of these elements plays a crucial role in various chemical reactions and applications.
| 4. Why are metals considered good conductors of heat and electricity? | |
Ans. Metals are considered good conductors of heat and electricity because they have free-moving electrons within their structure. These delocalized electrons can transfer energy quickly, allowing heat and electrical charges to flow efficiently through the metal, making them ideal for electrical wiring and cooking utensils.
| 5. How do metals and non-metals react with acids? | |
Ans. Metals typically react with acids to produce hydrogen gas and a salt. For example, when zinc (Zn) reacts with hydrochloric acid (HCl), it produces zinc chloride (ZnCl₂) and hydrogen gas (H₂). Non-metals, on the other hand, do not usually react with acids in the same way, as they do not have the same reactivity. Some non-metals, like carbon, may react with strong acids under certain conditions, but the reactions are different compared to metals.
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Oct 10, 2025
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