Sodium and Potassium are metals but have low tensile strength. Solution: The property of metal by which it can be drawn into wires is called ductility. For example: magnesium reacts with oxygen to form magnesium oxide. Solution: Silver nitrate and copper metal undergoes displacement reaction as copper is more reactive than silver. However, zinc can react with simple acids found in food. Which of the following pairs of compounds undergo displacement reaction when they react with each other? Who is the longest reigning WWE Champion of all time? Solution: Carbon is a non-metal. Nonmetal + Oxygen Nonmetal oxide. More reactive metal displaces less reactive metal from its salt. Tin only reacts with very strong acids. Read about our approach to external linking. For example, magnesium reacts with oxygen to produce magnesium oxide. 34. 35. The reaction can be represented by this word equation: Metal oxides are bases. The gas evolved during this reaction is: Solution: Hydrogen gas is evolved mostly when a metal reacts with an acid. Metals like zinc and aluminium react with sodium hydroxide to produce ____ gas. When sulphur reacts with oxygen, the oxide formed is ___ in nature. Example – Sulfur is a nonmetal and when it reacts with oxygen, it forms sulfur dioxide. Pure carbon can exist in very different forms. Ano ang pinakamaliit na kontinente sa mundo? Magnesium is widely distributed in plant and animal foods and in beverages. Sodium metal is dipped in which of the following substances for storage? Reactions are given below –, Sodium metal reacts with water and forms sodium hydroxide and hydrogen gas. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. What is the property that makes metals shine called? It is the hardest natural substance known. Some metal oxides dissolve in water and, when they do, they produce alkaline solutions. Gold is the most malleable metal. Solution: Out of these only Carbon (C) is a non-metal whereas the others are all metals. Read about our approach to external linking. They react with acids and neutralise them. The other metal elements are not magnetic. The property of metal by which it can be drawn into wires is called _____. It means they don’t possess the property of malleability. Metal + Water Metal hydroxide + hydrogen, Example – Sodium metal reacts with water and forms sodium hydroxide and hydrogen gas. 40. Reaction is given below –. Aluminium metal reacts with Sodium hydroxide and forms sodium aluminate and hydrogen gas. Oxygen, carbon, sulfur and chlorine are examples of non-metal elements. In which place the raw silk factories in tajikistan? So, it displaces iodine in potassium iodide compounds. Solution: An alkaline or basic solution turns red litmus paper to blue. In general, foods containing dietary fiber provide magnesium. On being struck hard, the metals produce a ringing sound. These types of reactions are called displacement reactions. Example – C + conc. The other metal elements are not magnetic. 38. Diamonds are used in jewellery and cutting tools. It is an important topic and answering the MCQs prepared based on the concepts of this chapter will help the students to prepare more competently for the exams. • 25. Metals react with oxygen and form metallic oxides which are basic in nature. The elements can be placed in the periodic table. Metals can be hammered into thin sheets. These reactions generally take place at high temperatures. When we dissolve magnesium oxide in water, it gives magnesium hydroxide. Ibat ibang katawagan sa pilipinas ng mundo? Instead they are brittle as they break down into pieces on hammering. Students can find the CBSE Class 8 Science Chapter 4 Metals and Non-Metals Objective Questions with solutions for practice. . The reaction involved is: Hence, the oxide formed is acidic in nature. Nonmetals do not react with dilute acid but react with concentrated acid. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Example – 4S + 8NaOH Na2SO4 + 3Na2S + 4H2O (At >600 ℃). Metals are lustrous which means they have a shiny appearance. Reactions are given below –. It means they possess the property of malleability. Our tips from experts and exam survivors will help you through. Nonmetals are not lustrous which means they are not shiny. 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