Metals and non-metals are essential elements that form the basis of our daily lives. This chapter explores their unique properties such as malleability, ductility, conductivity, and reactivity. Through these MCQs, students can strengthen their understanding of how metals and non-metals differ and their wide range of applications in everyday life.
MCQ Questions for Class 7 Science Chapter 4 The World of Metals and Non-metals with Answers
Question 1: Which of the following is a property of metals?
a) Brittle
b) Good conductors of heat
c) Dull appearance
d) Poor conductors of electricity
Answer:
b) Good conductors of heat — Metals are generally good conductors of heat.
Question 2: Which of the following is a non-metal?
a) Copper
b) Aluminium
c) Sulphur
d) Iron
Answer:
c) Sulphur — Sulphur is a non-metal.
Question 3: Which metal is liquid at room temperature?
a) Iron
b) Mercury
c) Sodium
d) Aluminium
Answer:
b) Mercury — Mercury is the only metal that is liquid at room temperature.
Question 4: Which of the following is a property of non-metals?
a) Sonorous
b) Ductile
c) Poor conductors of heat
d) Lustrous
Answer:
c) Poor conductors of heat — Non-metals are generally poor conductors of heat.
Question 5: Which metal is used in making electrical wires?
a) Iron
b) Copper
c) Aluminium
d) Gold
Answer:
b) Copper — Copper is widely used in electrical wires due to high conductivity.
Question 6: Which property helps in making jewellery from gold?
a) Brittleness
b) Ductility
c) Sonority
d) Poor conductivity
Answer:
b) Ductility — Gold is highly ductile, so it can be drawn into thin wires or sheets for jewellery.
Question 7: Which of the following is a lustrous non-metal?
a) Carbon
b) Phosphorus
c) Iodine
d) Sulphur
Answer:
c) Iodine — Iodine is a non-metal that shows lustre.
Question 8: Which of the following is a soft metal?
a) Iron
b) Copper
c) Sodium
d) Aluminium
Answer:
c) Sodium — Sodium is a soft metal that can be cut with a knife.
Question 9: Which gas is released when a metal reacts with acid?
a) Oxygen
b) Hydrogen
c) Carbon dioxide
d) Nitrogen
Answer:
b) Hydrogen — Metals react with acids to release hydrogen gas.
Question 10: Which metal is used to make ornaments other than gold?
a) Silver
b) Aluminium
c) Iron
d) Copper
Answer:
a) Silver — Silver is commonly used in making ornaments.
Question 11: Which of the following is a non-metal used in fertilizers?
a) Nitrogen
b) Calcium
c) Copper
d) Aluminium
Answer:
a) Nitrogen — Nitrogen is an essential non-metal used in fertilizers.
Question 12: Which property of metals makes them suitable for cooking utensils?
a) Malleability
b) Ductility
c) Good conductivity of heat
d) Sonority
Answer:
c) Good conductivity of heat — Metals conduct heat well, making them suitable for cooking utensils.
Question 13: Which of the following is the hardest natural substance?
a) Graphite
b) Diamond
c) Quartz
d) Steel
Answer:
b) Diamond — Diamond, a form of carbon, is the hardest natural substance.
Question 14: Which of the following is a non-metal but a good conductor of electricity?
a) Sulphur
b) Graphite
c) Phosphorus
d) Iodine
Answer:
b) Graphite — Graphite conducts electricity though it is a non-metal.
Question 15: Which of these metals is used in making thermometers?
a) Copper
b) Mercury
c) Aluminium
d) Iron
Answer:
b) Mercury — Mercury is used in thermometers because it expands uniformly with heat.
Question 16: Which metal is used in making aircraft bodies?
a) Iron
b) Aluminium
c) Copper
d) Zinc
Answer:
b) Aluminium — Aluminium is light and strong, so it is used in aircraft bodies.
Question 17: Which of the following non-metals is essential for respiration?
a) Carbon dioxide
b) Nitrogen
c) Oxygen
d) Hydrogen
Answer:
c) Oxygen — Oxygen is essential for respiration.
Question 18: Which of the following metals is attracted to magnets?
a) Copper
b) Aluminium
c) Iron
d) Silver
Answer:
c) Iron — Iron is strongly attracted to magnets.
Question 19: Which of the following is an alloy?
a) Copper
b) Steel
c) Aluminium
d) Zinc
Answer:
b) Steel — Steel is an alloy of iron and carbon.
Question 20: Which gas is produced when carbon reacts with oxygen?
a) Hydrogen
b) Carbon dioxide
c) Nitrogen
d) Sulphur dioxide
Answer:
b) Carbon dioxide — Carbon reacts with oxygen to form carbon dioxide.
Question 21: Which non-metal is used in pencils?
a) Carbon (Graphite)
b) Sulphur
c) Phosphorus
d) Oxygen
Answer:
a) Carbon (Graphite) — Graphite, a form of carbon, is used in pencils.
Question 22: Which of the following is a property of non-metals?
a) Sonorous
b) Malleable
c) Ductile
d) Non-sonorous
Answer:
d) Non-sonorous — Non-metals are not sonorous.
Question 23: Which metal is used in making coins along with copper?
a) Aluminium
b) Zinc
c) Nickel
d) Iron
Answer:
c) Nickel — Nickel along with copper is used in making coins.
Question 24: Which non-metal is used in disinfectants?
a) Oxygen
b) Chlorine
c) Hydrogen
d) Nitrogen
Answer:
b) Chlorine — Chlorine is used in disinfectants and for purifying water.
Question 25: Which of these metals is most malleable?
a) Copper
b) Silver
c) Gold
d) Aluminium
Answer:
c) Gold — Gold is the most malleable metal.
Question 26: Which of these non-metals is used in matchsticks?
a) Phosphorus
b) Carbon
c) Sulphur
d) Iodine
Answer:
a) Phosphorus — Phosphorus is used in making matchsticks.
Question 27: Which gas is used in filling electric bulbs?
a) Oxygen
b) Nitrogen
c) Argon
d) Carbon dioxide
Answer:
c) Argon — Argon is used in electric bulbs to prevent the filament from burning.
Question 28: Which of the following metals is used in making railways?
a) Iron
b) Aluminium
c) Zinc
d) Gold
Answer:
a) Iron — Iron is used to make railway tracks.
Question 29: Which non-metal is used in the process of vulcanization of rubber?
a) Oxygen
b) Sulphur
c) Carbon
d) Nitrogen
Answer:
b) Sulphur — Sulphur is used in vulcanization of rubber.
Question 30: Which metal is used in galvanization?
a) Zinc
b) Iron
c) Copper
d) Aluminium
Answer:
a) Zinc — Zinc is used to galvanize iron and protect it from rusting.
Question 31: Which non-metal is essential for combustion?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Sulphur
Answer:
a) Oxygen — Oxygen is essential for combustion.
Question 32: Which non-metal is used in crackers?
a) Oxygen
b) Sulphur
c) Nitrogen
d) Carbon
Answer:
b) Sulphur — Sulphur is used in fireworks and crackers.
Fill in the Blanks Questions for Class 7 Science Chapter 4 The World of Metals and Non-metals
1. Metals are generally ___ conductors of heat and electricity.
Answer:
Good
2. Non-metals are usually ___ conductors of heat and electricity.
Answer:
Poor
3. The only metal that is liquid at room temperature is ___.
Answer:
Mercury
4. The hardest natural substance is ___.
Answer:
Diamond
5. ___ is a non-metal which conducts electricity.
Answer:
Graphite
6. The property of metals by which they can be beaten into thin sheets is called ___.
Answer:
Malleability
7. The property of metals by which they can be drawn into wires is called ___.
Answer:
Ductility
8. Metals produce ___ gas when they react with acids.
Answer:
Hydrogen
9. Gold and silver are used for making jewellery because they are ___ metals.
Answer:
Ductile and lustrous
10. Sodium and potassium metals are stored in ___ to prevent their reaction with air.
Answer:
Kerosene
11. The metal used in making aircraft bodies is ___.
Answer:
Aluminium
12. The gas used in filling electric bulbs to prevent filament damage is ___.
Answer:
Argon
13. The process of coating iron with zinc to prevent rusting is called ___.
Answer:
Galvanization
14. The non-metal used in vulcanization of rubber is ___.
Answer:
Sulphur
Class 7 Science MCQ
- MCQ on The Ever-Evolving World of Science for Class 7
- MCQ on Exploring Substances: Acidic, Basic, and Neutral for Class 7
- MCQ on Electricity: Circuits and their Components for Class 7
- MCQ on Changes Around Us: Physical and Chemical for Class 7
- MCQ on Adolescence: A Stage of Growth and Change for Class 7
- MCQ on Heat Transfer in Nature for Class 7
- MCQ on Measurement of Time and Motion for Class 7
- MCQ on Life Processes in Animals for Class 7
- MCQ on Life Processes in Plants for Class 7
- MCQ on Light: Shadows and Reflections for Class 7
- MCQ on Earth, Moon, and the Sun for Class 7
