Class 8 | Science | Ch 4 | Materials : Metals and Non Metals | NCERT Solutions 1.Which of the following can be beaten into thin sheets? (a) Zinc (b) Phosphorus (c) Sulphur (d) Oxygen Answer: (a) Zinc 2. Which of the following statements is correct? (a) All metals are ductile. (b) All non-metals are ductile. (c) Generally, metals are ductile. (d) Some non-metals are … [Read more...] about Chapter 4 Materials : Metals and Non Metals
non-metals
Classification of Matter
Matter Matter is defined as anything that occupies space and possesses mass. Classification of Matter (1) Physical classification (a) Solid (b) Liquid (c) Gases Solid Liquid Gases (1) They have fixed shape and volume They do not have fixed shape but have fixed volume They do not have fixed shape and volume (2) They cannot be compressed They … [Read more...] about Classification of Matter
Metals
Question 1 Name one metal which has a low melting point? Question 2 Name two metals which are malleable and ductile? Question 3 Name one soft metal that can be cut with knife? Question 4 Name the metal which is the poorest conductor of heat? Question 5 Why copper and aluminium metals are used for making electric wires? Question 6 Why copper and aluminium metals … [Read more...] about Metals
Covalent Bond
Question 1 Define covalent bond? Question 2 Why non-metals form covalent bond? Question 3 What is a single covalent bond. Give example? Question 4 What is a double covalent bond. Give example? Question 5 What is a triple covalent bond. Give example? Question 6 Give few properties of covalent compounds? Covalent bond The chemical bond formed by sharing of … [Read more...] about Covalent Bond
Non-Metals
Question 1 Name one non-metal which conduct electricity? Question 2 Name one non-metal which have shiny surface? Question 3 Name one non-metal which is hard? Question 4 Name one non-metal having high melting point? Question 5 Why graphite is used in making electrodes? Question 6 Name one non-metal which is brittle? Question 7 Name one non-metal which has low … [Read more...] about Non-Metals