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Class 8 Chemistry Chapter 3: Synthetic Fibres and Plastics 1. Define Fibre? Fibre is a strong and flexible thread like material that is used to make fabric. It is used to make ropes and nets and several household items. 2.What are the two types of Fibres? Natural fibres are of…
CH-4 Materials: Metals & Non metals 1. Define Matter? 2. Define Element? 3.How are Elements classified? 4. Define Ores? 5.What is Gangue ? In Ores, there are certain impurities present along with metallic minerals. These impurities are called as Gangue. 6.Define Metallury ? The series of processes carried out to…
Coal & Petroleum. 1. What are Natural Resources? 2. How are Natural resources classified? Depending on abundance and availability they are classified into Exhaustible Natural resources and Inexhaustible natural resource. Inexhaustible Natural Resources Exhaustible Natural Resources These are present in unlimited quantity in nature. These resources are present in limited…
Grade 8, Science Chemistry Define Combustion?? Difference between Combustible and Non combustible substances?? Combustible substances Non combustible substances Substances that burn easily in air to produce heat and light are called combustible substances Substances that do not burn in air are called Non combustible substances Ex: Cloth, Wooden stick, dry…
Grade 8, Science- Chemistry Embark on a fascinating journey into the realm of the chemical effects of electric current in this lesson. 1. Define Electrical energy? 2. Difference between Conductors and Insulators? Conductors Insulators Materials that allow electricity to flow through them easily are called as Conductors Materials that do…