generally non metals react with acids

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