Metals are naturally occurring substances found below the surface of the earth in the form of ores. They are solid, lustrous, malleable, ductile, sonorous and good conductors of heat and electricity. Some metals are abundantly available in nature, and some are rarely available.
The metal reacts with water and oxygen to form corresponding hydroxide and oxide.
M + H2O → MOH
M + O2 → M2O
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Definition: Metals are naturally occurring substances found below the surface of the earth in the form of ores. They are solid, lustrous, malleable, ductile, sonorous and good conductors of heat and electricity. |
Five properties of Metals Chemistry Questions with Solutions
Q1. Which of the following is ferrous metal?
(a) Aluminium
(b) Iron
(c) Zinc
(d) None of the above
Answer: (b) Iron
Q2. Which of the following metal is present in the bauxite?
(a) Aluminium
(b) Magnesium
(c) Calcium
(d) None of the above
Answer: (a) Aluminium
Q3. Which of the following metal catches fire?
(a) Sodium
(b) Potassium
(c) Both (a) and (b)
(d) None of the above
Answer: (c) Both (a) and (b)
Q4. Which of the following property of metals is used for making bells and strings of musical instruments?
(a) Sonorousness
(b) Ductility
(c) Both (a) and (b)
(d) None of the above
Answer: (a) Sonorousness
Q5. Which of the following property of metals is used for drawing metal into the thin wire?
(a) Sonorousness
(b) Ductility
(c) Both (a) and (b)
(d) None of the above
Answer: (b) Ductility
Q6. Name any two soft metals.
Answer: Sodium and potassium
Q7. What are the properties of metals?
Answer: A few properties of metals are mentioned below.
1. They are good conductors of heat and electricity.
2. They have a high boiling point.
3. They are solid at room temperature.
4. They are ductile.
5. They are shiny.
6. They are ductile.
7. They are malleable.
8. They are sonorous.
Q8. What do you understand by the term malleability?
Answer: Malleability is the property of metals, allowing them to be beaten into flat sheets. If we hammer metal, it becomes lengthier and larger but does not break. This process can obtain thin sheets.
Q9. What do you understand by the term ductility?
Answer: Ductility is the property of metals, allowing them to be drawn into wires. They are drawn into wires and are used for electrical purposes.
Q10. What happens when a magnesium ribbon is heated?
Answer: Magnesium ribbon burns with a flashy white flame, forming white granular magnesium oxide.
2 Mg + O2 → 2 MgO
Q11. How do metals react with water?
Answer: Metal reacts with water to form oxide or hydroxide. Reactive metals like sodium and potassium react with water vigorously to liberate a large amount of heat.
Na + H2O → NaOH + H2
Magnesium reacts with boiling water, whereas iron reacts with moisture. Non-reactive metals like gold and silver do not react with water.
Q12. Which of the following metal is added to platinum to give toughness?
(a) Lanthanum
(b) Osmium
(c) Both (a) and (b)
(d) None of the above
Answer: (b) Osmium
Q13. Draw the electrochemical series of metals.
Answer:
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Electrochemical Series |
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|---|---|---|---|
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K |
Potassium |
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Most electropositive Electrpositive Increasingly electropositive Least electropositive |
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Na |
Sodium |
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Ca |
Calcium |
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Mg |
Magnesium |
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Al |
Aluminium |
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Zn |
Zinc |
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Fe |
Iron |
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Pb |
Lead |
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H |
Hydrogen |
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Cu |
Copper |
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Hg |
Mercury |
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Ag |
Silver |
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Au |
Gold |
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Q14. What happens when active metals react with oxygen?
Answer: An active metal donates its electrons to oxygen to form metal oxide.
For alkali metals, M + O2 → M2O.
For alkaline earth metals, 2 M + O2 → MO
Q15. Differentiate between metal and non-metal.
Answer:
|
S. No. |
Metal |
Non-Metal |
|---|---|---|
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1. |
They are solid at room temperature except mercury. |
They exist in all three states |
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2. |
They are tough except for sodium and potassium. |
They are soft except for diamonds. |
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3. |
They are lustrous. |
They are non-glossy except for iodine. |
|
4. |
They are ductile and malleable, i.e. can be drawn into wires and sheets. |
They are brittle and can break down into pieces. |
|
5. |
They have high densities. |
They have low densities. |
|
6. |
They are electropositive. |
They are electronegative. |
Practice Questions on Five properties of Metals
Q1. Why do we store sodium and potassium in kerosene?
Q2. Why can copper not displace zinc from its salt solution?
Q3. Why are aluminium foils used to wrap food items?
Q4. Why are immersion rods for heating liquids made up of metal?
Q5. Why is copper used for making hot water tanks instead of steel?
Click the PDF to check the answers for Practice Questions.
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