NCERT Solutions for Class 10 Science Chapter 3 – Metals and Non-metals
NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals follow all the guidelines given by CBSE Board. This chapter is about metallic and non-metallic elements, their properties and uses in our daily lives. This chapter teaches you that metals show distinct physical and chemical properties. Further, this chapter teaches you about extractions and isolation of metals from ores.
There are 16 questions at the end of the NCERT Solutions for Class 10 Science Chapter 3 which cover all the topics given in the chapter very thoroughly. Some of the questions are multiple-choice, some are being asked directly, and some utilize your application and analysis skills to solve various questions.
Metals and Non-Metals provided here are drafted by very experienced science teachers. These are easy to grasp and retain. They are very useful for learning and revising during the class 10th board exam. They also help you prepare for various competitive exams.
NCERT Class 10 Science Chapter 3 Metals and Non-Metals
NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-Metals comprise of many important concepts from board exam point of view. Some of them have been discussed below.
- Physical properties of metals and non-metals
This chapter teaches you that the general physical properties of metals differentiating them from non-metals are metallic lustre, hardness (varies from metal to metal), malleability, ductility, considerable conduction of heat and electricity. Further, it also tells you that non-metals are usually non-lustrous, soft, mostly found in gaseous and liquid states, and poor conductors of heat and electricity. Although there are some exceptions. An example of an exception to the physical properties is that metals lead and mercury both are poor conductors of heat.
- Chemical properties of metals
This chapter tells you that metals burn in air to give basic (Na2O) or amphoteric oxides (Al2O3). Metals also react with water to give metal oxide or hydroxide and hydrogen gas. Some active metals show more violent reactions with water. Some react with dilute acids to corresponding salts and hydrogen gas. Some react with the solutions of less reactive metals and displace the less reactive metal, according to their place in reactivity series.
- How do metals and non-metals react
This portion of CBSE NCERT Class 10 Science Chapter 3 tells you that reactivity of all the elements is an outcome of their need to complete their outer octet configuration to achieve stability. They can achieve the same through losing (metals) or gaining (non-metals) electrons to furnish ions and make electrovalent bonds finally.
- Properties of ionic compounds
This part of the chapter tells you that the ionic compounds have distinct physical properties like hardness, brittleness, high melting and boiling points. They are also soluble in water and show good conducting properties in the solution of other metal salts and in the molten state.
- Occurrence of metals
NCERT Class 10 Science Chapter 3 teaches you that metals occur naturally in the form of minerals, and pure metals are extracted from these minerals using different physical and chemical processes.
- Extraction of metals
This portion of the chapter tells you that the metals are available in earth’s crust in free or combined form depending upon their reactivity categorized as low, medium and high. The chapter further tells you that different techniques of extraction are required to isolate different metals.
- Enrichment of ores
This portion tells you that the first step of the extraction is to free the mineral from gross impurities called gangue, using different physical and chemical techniques.
- Extracting metals at low, medium and top in the activity series
Class 10 Science Metals and Non-metals teaches you that the metals lying low in the activity series are very unreactive and the oxides of such metals can be reduced to metals by heating alone. One of the examples is, cinnabar (HgS), an ore of mercury which is first heated in air to convert it into mercuric oxide (HgO) then reduced to mercury on further heating.
Next, you learn that metals in the middle of the activity series are usually present as sulphides or carbonates in nature which are converted into metal oxides prior to extraction by using suitable processes of roasting or calcination and finally the metal oxides are reduced to the corresponding metals by using suitable reducing agents.
Chapter 3 further tells you that highly reactive metals are obtained by electrolytic reduction as carbon cannot reduce their oxides.
- Refining of metals
This portion of the chapter deals with the method of electrolytic refining used for obtaining metals in their purest forms.
- Corrosion and prevention of corrosion
This portion of the chapter tells you that metals react with atmospheric oxygen in the presence of moisture known as the process of corrosion. It further tells you about the methods of preventing corrosion such as painting, oiling, greasing, galvanizing, chrome plating, anodizing, or making alloys.
NCERT CBSE Class 10 Science Chapter 3 Exercises
NCERT Solutions for Class 10 Science Chapter 3- Metals and Non-Metals answer all questions of the exercise in an easy to understand, detailed and step by step manner. The components of the same have been discussed below. The exercise comprises 16 comprehensive questions.
- Question 1 to 5 are multiple-choice types and are based on various physical and chemical properties of metals.
- Question 6 is a direct question based on amphoteric oxides.
- Question 7,8 and 11 are application-based questions utilizing the concept of reactivity series of metals.
- Question no. 9 and 11 are direct questions, based on the reactivity of sulphur/non-metals with oxygen and the outcomes.
- Question 10 and 13 are direct questions asking about corrosion and ways of prevention.
- Question no. 14 asks you to differentiate between metals and nonmetals.
- Question 15 is a situation based question with its solution lies in the concept of more active metal replacing the less active metal from its solution.
- Question 16 is an application-based question using the physical property of the metal.
Benefits of NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals
Some of the top benefits of reading from our NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-Metals have been given below.
- They provide you with the best possible solutions for questions given in chapter 3.
- They answer all questions from all exercises in a step by step manner.
- They are to the point solutions and a hundred percent accurate.
- They cover a wide range of question types important from exam point of view
- They help you learn and revise speedily and efficiently
- They help you score well in your exams