To prevent the contact of phosphorus with atmospheric oxygen, it is stored in water. Let us see how metals and non-metals behave with acids. The ability of metals to be drawn into thin wires is known as The chapter starts with a discussion on appearances and hardness of different materials used commonly. Acids react with most metals to form a salt and hydrogen gas. Copper displaces zinc from zinc sulphate solution. Generally metals react with acids to give salt and hydrogen gas. You must have noticed that copper does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric acid. Which of the following metals is in the liquid state at room temperature? Coal can be drawn into wires. Non metals do not react with acid. Non-metals are themselves acceptors of electrons so there is no way they can donate electrons to the hydrogen ion of the acid. Metal + Sodium hydroxide → Hydrogen. Non-metals generally do not react with acids. (c) Copper displaces zinc from zinc sulphate solution. While magnesium, zinc, iron, tin and lead does not react vigorously with acids. A. H₂SO₄ B. HCl C. HNO₃ D. All the these . When a metal displaces another metal from a compound; this is called displacement reaction. Science Class 8 - Chapter 4 - Materials: Metals and Non -Metals - NCERT Exercise Solution ( Question-Answer) Provided here. The composition of aqua-regia is A. Dil.HCl : Conc. Non-metals do not react with acids except sulphur which react with hot, concentrated acid. Non-metals’ reaction with sodium hydroxide is much complex. … Mg + HCl → MgCl 2 + H 2 Fe + H 2 SO 4 → FeSO 4 + H 2. Sol. 3] On burning, metals react with oxygen to produce metal oxides and hydrogen gas. Ans: (a) False (b) True (c) False (d) False . Metals which fall below hydrogen in the reactivity series does not react with dilute acids. Q4. All NCERT textbook questions have been solved by our expert teachers. Metals react with acids to produce metal salts and hydrogen gas, generally non- metals do not react with acids; Some of the metals react with bases to produce hydrogen gas. The first part of the chapter, Materials: Metals and Non -metals discusses the physical properties of metals and non-metals in a detailed manner. (a) Generally, non-metals react with acids. MP Board Class 8th Science Materials: Metals and Non-Metals NCERT Additional Important Questions. They react with acids as well as with bases. Non – metals are electronegative and are unable to break the bond between H and O in water. Q.8. (F) (b) Sodium is a very reactive metal. (F) (ii) Sodium is a very reactive metal. Mark ‘T’ if the statement is true and ‘F’ if it is false. Question 1. ( ) 4. Generally, non-metals do not react with water though they may be very reactive in air. ( ) 2. As discussed previously, metals that are more active than acids can undergo a single displacement reaction.For example, zinc metal reacts with hydrochloric acid producing zinc chloride and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)? The acids react with aluminium to release hydrogen which would spoil the food and render it unfit for use. Sodium is a very reactive metal. More reactive metals can displace less reactive metals from their salt solutions. Match the substances given in Column A with their uses given in Column B. To prevent the contact of phosphorus with atmospheric oxygen, it is stored in water. Coal can be drawn into wires. Oxides of aluminium (Al 2 O 3), zinc (ZnO), tin (SnO) and iron (Fe 2 O 3) are amphoteric. Distinguish between metals and non-metals on the basis of these properties. Watch Queue Queue Activity. Some properties are listed in the following Table. The non – metals cannot reduce hydrogen by donating electrons. Metals react with sodium hydroxide to produce hydrogen gas. (b) Metals are good conductors of heat and electricity. Non metals do not react with acids usually a metal reacts with acid to produce hydrogen gas while this is not observed with non metals, this is because metals are electro-positive . Distinguish between metals and non-metals on the basis of these properties. Sodium is a very reactive metal. It catches fire if exposed to air. Generally, non-metals do not react with water though they may be very reactive in air. 5. Reaction with bases : Most of the metals do not react with bases. 8. Metals are good conductors of heat and electricity. (d) Metals react with acids to produce hydrogen gas. A. Short Answer Type Questions. F. Question 7. Copper displaces zinc from zinc sulphate solution. HNO₃ = 3 : … C. Reactions with Acids . ( ) Answer: 1. Acids and Bases React with Metals. 2. You can also get free sample papers, Notes, Important Questions. The composition of aqua-regia is (a) Dil.HCl : Conc. Reaction with W ater Let us see how metals and non-metals react with water . Generally, the non-metals do not react with acids. ( ) 3. Non-metals: Generally, non-metals do not react with acids. Examples- carbon dioxide, diphosphorus pentoxide and nitrogen dioxide. You can refer to NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. This is because when a substance reacts with acids, it provides electrons to the H+ ions produced by the acids. Mark ‘T’ if the statement is true and ‘F’ if it is false. ( ) Answer: (i) Generally, non-metals react with acids. ( ) (b) Sodium is a very reactive metal. (a) iron (b) sodium (c) gold (d) magnesium; Metals are generally solid. Recall the name of some of the laboratory acids and bases you have read in Class VII. For example, phosphorus is a very reactive non-metal. Generally, oxides of non-metals are acidic in nature. (d) Metals react with acids to produce __hydrogen__ gas. Generally metals react with acids to give salt and hydrogen gas. Such non-metals are stored in water. It catches fire if exposed to air. (F) Q.5 Some properties are listed in the following Table. Which of the given acids does not give hydrogen gas on reacting with metals (except Mn and Mg)? 7. produce acids. Reactions with Bases . Identify the metal or non-metal present in them which forms oxides with oxygen. T. 3. (a) H 2 SO 4 (b) HCl (c) HNO 3 (d) All of these 8. ( ) (d) Coal can be drawn into wires. Generally, non-metals react with acids. 4. Distinguish between metals and non-metals … Non metals have low density. 2] Metals are good conductors of heat but non-metals are poor conductors. ( ) (b) Sodium is a very reactive metal. This video is unavailable. Like Graphite. They cannot displace hydrogen to form a bond with a non-metal anion. Metals have high density. Aim: To show that hydrogen is produced when magnesium reacts with dilute sulphuric acid Materials needed: Magnesium ribbon, dilute sulphuric acid, test tube, dropper, and a matchstick Method: Take a piece of magnesium ribbon in the test tube. (d) Coal can be drawn into wires. (d) Metals react with acids to produce _____ gas. MP Board Class 8th Science Materials: Metals and Non-Metals NCERT Intext and Projects Activities. Let us see how metals and non-metals behave with acids. Download free PDF of best NCERT Solutions , Class 8, Science, CBSE-Materials-metals and non-metals . F. 4. Non metals are poor conductors of heat and electricity. TABLE 4.2 Malleability of Materials. (a) Generally, non-metals react with acids. However, some metals like Al, Pb, Zn react with strong bases like NaOH to form complex salts and hy­drogen gas. Reaction of Metal With Other Metal Salts In the following table some substances are given in column I. They are generally formed by non-metals. You must have found that non-metals generally do not react with acids but metals react with acids and produce hydrogen gas that burns with a ‘pop’ sound. Answer: a → F, b → T, c → F, d → F. Question 5: Some properties are listed in the following Table. Which of the following metals is an exception and can be cut with a knife? Activity 4.7 (To be demonstrated by the teacher. Non-metals do not react with water (or steam) to evolve Hydrogen gas. The acids react with metals to give hydrogen which would spoil the food and makes it unfit to use. (c) Iron is more reactive than copper. Note down their names in Table 4.4. (b) Sodium is a very reactive metal. (a) Generally, non-metals react with acids (b) Sodium is a very reactive metal (c) Copper displaces zinc from zinc sulphate solution (d) Coal can be drawn into thin wires . 1] Metals are malleable and ductile.Non-metals do not have such properties. Displacement reactions. Reaction with Oxygen: Metals form oxides which are basic in nature. HNO 3 3 : 1 (b) Conc.HCl : Dil. Answer: (a) … (d) Metals react with acids to produce __hydrogen__ gas. 4. TABLE 4 3 Electrical Conductivity of Materials. They act as acids when they dissolve in water, and this is why indicator paper must be moist in order to detect whether a non-metal oxide gas is acidic. ( ) (c) Copper displaces zinc from zinc sulphate solution. Metal and non-metal both react with oxygen (air), water and acids. (a) Generally, non-metals react with acids. Reaction with Bases. Generally, non-metals react with acids. Metals and Non-metals Class 10 MCQs Questions with Answers. ( ) (d) Coal can be drawn into wires. C. Reactions with Acids. Metals are generally hard. Such non-metals are stored in water. Science NCERT Grade 8, Chapter 4, Materials: Metals and Non-Metals lay emphasis on fundamentals of metals and non-metals. For example, phosphorus is a very reactive non-metal. (T) (c) Copper displaces zinc from zinc sulphate solution. F. 2. They cannot displace less reactive metals from their salt solution. (a) Generally, non-metals react with acids. Generally, non-metals do not react with bases. 4) Mark ‘T’ if the statement is true and ‘F’ if it is false. HNO 3 3 : 1 (c) Conc.HCl : Conc.HNO 3 3 : 1 (d) Dil.HCl : Dil.HNO 3 3 : 1 9. Question 5: Some properties are listed in the following table. Question 1. (F) (d) Coal can be drawn into wires. Watch Queue Queue. Table 4.4 : Metals and Non-metals in Acids and Bases S.No. Q 8. (a) Generally, non-metals react with acids. ( ) (c) Copper displaces zinc from zinc sulphate solution. Soln: (a) Phosphorus is a very reactive non-metal. 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