Class 8 Science MCQ Chapter 4 Materials: Metals and Non-Metals Solutions in English Medium, Class 8 Science Multiple Choice Question Answer in English to each chapter is provided in the list so that you can easily browse throughout different chapters Class 8 Science MCQ Chapter 4 Materials: Metals and Non-Metals Notes and select need one.
Class 8 Science MCQ Chapter 4 Materials: Metals and Non-Metals
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Materials: Metals and Non-Metals
Chapter – 4
| MCQ |
1. In the following list, choose the one that is an acidic oxide.
(a) Na2O.
(b) carbon dioxide.
(c) carbon monoxide.
(d) aluminium oxide.
Ans: (c) carbon monoxide.
2. ‘X’ has the atomic number 12 and is found in the periodic table. Which inert gas is the most similar to X?
(a) He.
(b) Ar.
(c) Ne.
(d) Kr.
Ans: (c) Ne.
3. The process by which a carbonate ore is heated to high temperatures in the absence of oxygen in order to convert it to metal oxide is referred to as:
(a) roasting.
(b) reduction.
(c) calcination.
(d) smelting.
Ans: (c) calcination.
4. The oxidation of moderately reactive metals such as zinc, iron, nickel, tin, copper, and so on is reduced by using.
(a) Aluminium as reducing agent.
(b) Sodium as reducing agent.
(c) Carbon as reducing agent.
(d) Calcium as reducing agent.
Ans: (c) Carbon as reducing agent.
5. _____________ and ______________ are ignited with a burning magnesium ribbon in thermite welding, which results in the production of molten iron metal as well as a significant amount of heat being released.
(a) Iron (III) oxide and aluminium powder are used in this process.
(b) iron (II) oxide and aluminium powder.
(c) Iron (III) chloride and aluminium powder.
(d) Iron (III) sulphate and aluminium powder.
Ans: (a) Iron (III) oxide and aluminium powder are used in this process.
6. Galvanisation is a technique for protecting iron from corrosion by coating it with a thin layer of:
(a) Gallium.
(b) Aluminium.
(c) Zinc.
(d) Silver.
Ans: (c) Zinc.
7. An element X is soft and can be cut with a knife, according to the definition. This is extremely reactive to air and cannot be kept open in the presence of air for long periods of time. When it comes into contact with water, it reacts violently. Choose one of the elements from the list below.
(a) Mg.
(b) Na.
(c) P.
(d) Ca.
Ans: (b) Na.
8. The reaction between X and Y results in the formation of compound Z. X loses an electron, and Y gains an electron as a result of this. Which of the following characteristics is not demonstrated by Z?
(a) The melting point is high.
(b) The melting point is low.
(c) When in a molten state, it conducts electricity.
(d) It manifests itself as a solid.
Ans: (c) When in a molten state, it conducts electricity.
9. Which of the following is a non-metal?
(a) Aluminium.
(b) Oxygen.
(c) Iron.
(d) Silver.
Ans: (b) Oxygen.
10. Metalloids possess the properties of.
(a) metals.
(b) non-metals.
(c) both metals and nonmetals.
(d) none of these.
Ans: (c) both metals and nonmetals.
11. Which of the following is a characteristic property of metals?
(a) Poor conductors of electricity.
(b) Malleability.
(c) Brittle nature.
(d) Dull appearance.
Ans: (b) Malleability.
12. The most reactive metal is:
(a) copper.
(b) zinc.
(c) potassium.
(d) gold.
Ans: (c) potassium.
13. Which of the following is a characteristic property of metals?
(a) Poor conductors of heat.
(b) Dull appearance.
(c) Malleability.
(d) Brittle nature.
Ans: (c) Malleability.
14. Which of the following is an example of a non-metal?
(a) Copper.
(b) Iron.
(c) Sulphur.
(d) Silver.
Ans: (c) Sulphur.
15. Which property is commonly associated with non-metals?
(a) High melting points.
(b) High density.
(C) Good conductors of electricity.
(d) Brittle nature when in solid form.
Ans: (d) Brittle nature when in solid form.
16. Which of the following metals is known for its ability to resist corrosion?
(a) Lead.
(b) Aluminium.
(c) Iron.
(d) Zinc.
Ans: (b) Aluminium.
17. What is the primary reason metals are good conductors of electricity?
(a) Their low density.
(b) Their high melting points.
(c) The presence of free electrons.
(d) Their high reactivity.
Ans: (c) The presence of free electrons.
18. Which of the following non-metals is essential for respiration in animals?
(a) Nitrogen.
(b) Phosphorus.
(c) Chlorine.
(d) Oxygen.
Ans: (d) Oxygen.
19. Which metal is commonly used in electrical wiring due to its excellent conductivity?
(a) Silver.
(b) Iron.
(c) Gold.
(d) Lead.
Ans: (a) Silver.
20. Which of the following is a property of metals that is not typically shared by nonmetals?
(a) Ductility.
(b) Low melting point.
(c) Poor thermal conductivity.
(d) Lack of lustre.
Ans: (a) Ductility.
