Questions 10
State two ways to prevent the rusting of iron.
Two ways to prevent the rusting of iron are:
(i) Applying grease or paint.
(ii) Galvanization.
Key Concepts Covered
This question tests your understanding of the following concepts from the chapter Metals and Non-metals: Questions, Ways, Prevent, Rusting, Iron, Metals and Non-metals. These are fundamental topics in Science that students are expected to master as part of the CBSE Class 10 curriculum.
A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This Question
Read the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to Remember
- Read the question carefully and identify all parts before answering.
- Use the terminology specific to this subject and chapter.
- Review the textbook content for this chapter before attempting questions.
- Practice writing concise, well-structured answers within time limits.
Practice more questions from Metals and Non-metals — Science, Class 10 CBSE
Chapter 3: Metals and Non-Metals — Quick Revision Guide
Introduction
Metals and non-metals have contrasting physical and chemical properties. This chapter covers their properties, reactivity series, ionic bonding, extraction of metals from ores, and corrosion prevention.
Key Points at a Glance
- Metals: lustrous, malleable, ductile, good conductors, sonorous, high m.p./b.p. Exceptions: Hg (liquid), Na/K (soft), Na/K/Li (low density)
- Non-metals: dull, brittle, poor conductors, low m.p./b.p. Exceptions: iodine (lustrous), diamond (hardest), graphite (conductor)
- Metals react with O2 (basic oxides), H2O, dilute acids, and salt solutions based on reactivity
- Reactivity series: K > Na > Ca > Mg > Al > Zn > Fe > ... > H > Cu > Ag > Au
- Ionic bonding: electron transfer from metal to non-metal; ionic compounds have high m.p., are hard, brittle, conduct electricity when molten/dissolved
- Extraction depends on reactivity: high (electrolysis), medium (reduction with C), low (heating in air)
- Thermite reaction: Fe2O3 + 2Al → 2Fe + Al2O3 (railway welding)
- Electrolytic refining: anode = impure, cathode = pure, electrolyte = metal salt solution
- Alloys: brass (Cu+Zn), bronze (Cu+Sn), stainless steel (Fe+Cr+Ni+C), solder (Pb+Sn); improve properties
Real-World Connections
Gold/silver jewellery uses alloys for hardness; galvanised iron sheets resist rusting; aluminium foil for food packaging; copper wiring in electrical circuits; stainless steel utensils resist corrosion.
Quick Self-Test (5 Questions)
- What is the most important concept you learned from this chapter?
- Can you write three key equations/formulae from this chapter from memory?
- Draw a labelled diagram relevant to this chapter without looking at your notes.
- Explain one real-world application of a concept from this chapter.
- What is one common mistake students make in this chapter, and how can you avoid it?
Further Study
- NCERT Textbook Chapter 3
- NCERT Exemplar Problems
- Bright Tutorials Detailed Notes: ch03-metals-non-metals.html
- Bright Tutorials Practice Questions: ch03-metals-non-metals.html
- Previous Year CBSE Board Papers