NCERT Solution Class 8 Science - Chapter 4

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Class 8 Science NCERT Solution

Class 8 Science Chapter 4 may be a little difficult for some students to grasp. Materials: Metals and Non-Metals Class 8 chapter deals with the various properties of metals and nonmetals. NCERT Solution for Class 8 Science provided by Vedantu is prepared by teachers in accordance with the CBSE guidelines. Metals and Non-Metals Class 8 NCERT Solution help students to revise the chapter completely and score good marks. You can also register for the webinar classes which are conducted by the best Science tutors in India. Vedantu is a platform providing free solutions for various subjects to score good marks. You can also download Class 8 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

NCERT Solutions for Class 8 Science Chapter 4 - Materials : Metals and Non-Metals

Metals

Metals are opaque and lustrous. They are good conductors of heat and electricity along with being malleable and ductile. They are also denser than the other elemental substances. The metals also have a very high melting point and are solids at room temperature except for mercury which is liquid. Metals are also sonorous and produce sound when they are hit, causing such metals to be used in various instruments and bells. Metals also show reactivity and undergo chemical change either by themselves or by reacting with some other elements, releasing heat in the process. Potassium and Sodium are the most reactive metals which react violently when exposed to air or water.

Non-Metals

A nonmetal can be described as an element that does not display the properties of a metal and is a minority in the periodic table majorly located on the right-hand side. The only nonmetal that is found in the upper left corner of the periodic table is Hydrogen. The nonmetals and metals are parted by a line on the periodic table. Halogens and noble gases are some categories of nonmetals. Nonmetals have high electronegativities and high ionization energies, all being poor conductors of heat and electricity. When in solid form non-metals are brittle and lack lustre. Non-metals gain electrons easily and display a variety of reactivities and chemical properties.

NCERT Solutions Class 8 Science Chapter 4

NCERT Solutions for Class 8 Science Chapter 4 Materials: Metals and Non-Metals are provided on Vedantu. The chapter helps students distinguish between various metals and nonmetals based on their properties which include the physical properties, chemical properties and various uses of these elements. The lustre, hardness, malleability and various other properties that metals and nonmetals possess are well-explained in the first part of the chapter along with relevant images, diagrams and daily-life examples.

The section that follows would introduce students to the chemical reactions that metals and nonmetals undergo with substances like acids, bases and water. All the solutions provided on Vedantu are explained by expert Science teachers. The Class 8 Science Chapter 4 solutions would help students get a better understanding of the chapter and also give them an idea of how to answer the various questions. The format, as well as the keywords, have been highlighted, which would certainly help students.

Why Are NCERT Solutions The Most Reliable Study Material?

NCERT Solutions of Class 8 Science Chapter 4 is easy to understand and provides pointwise solutions which come in handy while preparing for exams. The exercise questions are answered clearly and help students understand what and how much they should write in their exams. The solutions help to revise quickly and are made by expert teachers following the latest syllabus and CBSE Guidelines. The solutions on Vedantu are 100 percent accurate, and the topics along with subtopics are clearly mentioned and demarcated for the convenience of students. NCERT Solutions are an indispensable tool for a quick revision and to get good grades in the exams.

Solved Examples

1. Answer True or False.

Generally, nonmetals react when exposed to acid- False.
Sodium happens to be a very reactive metal- True.
Zinc is displaced by copper in a Zinc Sulphate solution- False.
Coal is malleable and can be turned to wires- False.

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NCERT Solution-Materials Metals and Non - Metals part-1

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FAQ (Frequently Asked Questions)

1. State a Few Uses of Metals.

In our day to day lives, we come across many uses of metals and nonmetals. The various electronic devices that we use like refrigerators, AC, mobiles, etc. all have metals in their composition, which serve various purposes. One of the main purposes of metals in devices is to facilitate the transfer of electricity since metals are good conductors of electricity. Various metals are also used in medicine since they are active components in nerve impulse conduction, enzyme reaction, blood, etc. Metals are also found in our bodies for various purposes, and their deficiency can cause illness. Metals are used in jewellery, construction and in various industries such as electronics and automobiles.

2. What Are the Differences in the Physical Properties of Metals and Nonmetals?

When it comes to physical properties, metals and nonmetals differ in various ways. The metals are generally solid at room temperature except for mercury, which is in liquid form at room temperature. On the other hand, nonmetals may exist in the form of solid, liquid or gas. All the metals are lustrous while some nonmetals are non-lustrous as well. The density of metals is also higher with some exceptions like sodium, lithium and potassium. Nonmetals, on the other hand, have a low density which helps to differentiate between the two. Metals are also good conductors of electricity and heat, but non-metals are poor conductors and have low melting and boiling points, unlike metals.