Class 10th Science Chapter 3 – Hello students, today in this post we have brought important questions from NCERT Class 10th Science Chapter 3, Metals and Non-metals, which are frequently asked in exams. If you are preparing for the Class 10th Board Exam 2025 and want to see the Class 10 Science Chapter 3, Metals and Non-metals, VVI questions, then be sure to read this post carefully.
NCERT Class 10 Science Chapter 3, Metals and Non-metals, VVI Questions 2025-26
Chapter-2, Metals and Non-metals
Question 4. What is called ‘anode mud’?
Answer: Anode mud. “When metals are electrolytically refined, the impure anode dissolves in the electrolyte, and the insoluble impurities present in it collect at the bottom of the anode, which is called anode mud.”
Question 5. What do you understand by ‘activity series’?
Answer: Activity series. “A list in which metals are arranged in descending order of their reactivity is called an activity series.”
Question 6. What do you understand by allotropy? Name the two major allotropes of carbon.
Answer: Allotropy. “When an element is found in nature in different forms that differ in physical properties but have similar chemical properties, they are called allotropes of that element, and this property is called allotropy.”
The main allotropes of carbon are:
(1) Graphite, (2) Diamond.
Question 7. What do you understand by galvanization?
Answer: Galvanization – “To protect iron and steel from rusting (corrosion), a layer of zinc is applied to it. This process is called galvanization.”
Question 8. What is an amalgam?
Answer: Amalgam – “When a metal, such as zinc, is coated with mercury, the metal combines with mercury to form an alloy of mercury, which is called an amalgam.”
Question 9. What is a thermite reaction?
Answer: Thermite reactions – “Metal displacement reactions in which a lot of heat is generated, resulting in the displaced metal being obtained in a molten state, are called thermite reactions.”
Question 10. What do you understand by ‘alloy’?
Answer: Alloy – “A homogeneous mixture of two or more metals, or a metal and a non-metal, is called an alloy.”
Question 11. Explain the meaning of ‘malleable’ and ‘ductile’.
Answer: Malleable – “Metals that stretch into thin sheets when beaten are called malleable.”
Ductile – “Metals that can be drawn into wires are called ductile.”
Question 12. Why is sodium kept immersed in kerosene?
Answer: Sodium metal is highly reactive towards atmospheric moisture (humidity). Therefore, it is kept immersed in kerosene so that it does not come in contact with moisture.
Question 13. Why do ionic compounds have high melting points?
Answer: Because a considerable amount of energy is required to break the strong intermolecular force. Therefore, ionic compounds have high melting points.
Question 14. State two ways to protect iron from rust.
OR
Write two ways to protect against corrosion.
Answer: Two ways to protect iron from rust:
(1) Zinc plating – coating a layer of zinc on iron.
(2) Chromium plating – coating a layer of chromium on iron.
Question 15. What kind of oxides do nonmetals form when combined with oxygen?
Answer: Oxygen usually forms acidic oxides when combined with nonmetals, but some oxides are also neutral.
Question 16. Explain the meaning of malleability and ductility.
Answer: Malleability – “The property of metals that causes them to stretch like a sheet when beaten is called malleability.”
Ductility – “The property of metals that allows them to be drawn into wires is called ductility.”
Question 17. Name two metals that are found in the free state in nature.
Answer: (1) Gold (Au), (2) Silver (Ag).
Question 3. Define the following terms:
(1) Mineral
(ii) Ore
(iii) Gangue
(iv) Acoustic
Question 1. Give an example of a metal that:
(1) is liquid at room temperature.
(ii) can be easily cut with a knife.
(iii) is the best conductor of heat.
(iv) is a poor conductor of heat.
Answer: (1) Mercury, (ii) Sodium, (iii) Silver and Copper, (iv) Lead and Mercury.
