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