Class 10 Science - CBSE
Metals and Non-metals
The Class 10 CBSE chapter 'Metals and Non-metals' explores the physical and chemical properties of elements, dividing them into these two main categories based on their behavior. You will learn about the reactivity series, how metals react with oxygen, water, and acids, and how non-metals form covalent or ionic compounds. The chapter also covers the extraction of metals from ores through metallurgy, corrosion prevention, and the formation of alloys. This is a high-weightage chapter for CBSE board exams, frequently featuring direct chemical equations, reasoning questions based on the reactivity series, and conceptual queries about ionic bonding.
Start Learning FreeKey Concepts
Physical Properties
Metals are generally solid, malleable, ductile, lustrous, and good conductors of heat and electricity, whereas non-metals lack these properties and are often brittle.
Chemical Properties of Metals
Metals react with oxygen to form basic oxides, with water to form metal oxides or hydroxides and hydrogen gas, and with dilute acids to form salts and hydrogen gas.
Reactivity Series
A list of metals arranged in order of decreasing reactivity, which helps predict whether a more reactive metal can displace a less reactive metal from its salt solution.
Ionic Bonding
Chemical bonds formed by the complete transfer of electrons from a metal to a non-metal, resulting in positively and negatively charged ions held by strong electrostatic forces.
Metallurgy and Corrosion
The process of extracting pure metals from their ores through concentration, reduction, and refining, alongside methods like galvanizing to prevent metal corrosion.
Important Formulas
Board Exam Info
In the CBSE Class 10 Science board exam, this chapter typically carries around 5 to 6 marks. Questions commonly include chemical equations, identifying unknown metals based on displacement reactions, explaining the formation of ionic bonds using electron dot structures, and reasons for specific metallurgical processes or corrosion prevention.
Frequently Asked Questions
Ionic compounds have high melting and boiling points because they are formed by strong electrostatic forces of attraction between oppositely charged ions, which require a large amount of energy to break.
Ionic compounds have high melting and boiling points because of the strong electrostatic forces of attraction between oppositely charged ions, requiring a large amount of energy to break.
Why does hydrogen gas not evolve when metals react with nitric acid?
Nitric acid is a strong oxidizing agent. When it reacts with metals, it oxidizes the hydrogen gas produced to form water and itself gets reduced to nitrogen oxides.
What is the difference between an ore and a mineral?
Minerals are naturally occurring elements or compounds found in the earth's crust, while ores are specific minerals from which a metal can be extracted profitably and conveniently.
Learn Metals and Non-metals with Your AI Tutor
10 different ways to study this chapter. Free for 3 chapters per day.
Lecture
Key Points
Interactive
Quiz
Flashcards