Metals loose electrons .to form positive ions. The surface of this metal has a thin oxide layer that helps to protect it when it is exposed (2 marks) Q2: Fill in the spaces with the words in the boxes. In these reactions the metal loses electrons to oxygen, forming an ionic compound of the metal ion and oxide ion. Metal + Dilute acid → Salt + Hydrogen However, all metals do not react with acids. The activity series of metals is an empirical tool used to predict products in displacement reactions and reactivity of metals with water and acids in replacement reactions and ore extraction. This means that they contain ions that can neutralise (react with and cancel out) the H+ ions of the acids. Only metals above hydrogen in the reactivity series will react with dilute acids. ZnO and Al 2 O 3. Amphoteric oxides are the oxides, which react with both acids and bases to form salt and water. 4 Hydroxide ions transfer electrons to the cathode. All metals react with halogens. Solution 6 False. Todd Helmenstine is a science writer and illustrator who has taught physics and math at the college level. 3 Chloride ions are attracted to the anode. H + + OH-H 2 O e.g. Since metals react by losing electrons, the easier it is for a metal to lose electrons, the. Ans : [CBSE 2012] Those compounds which are formed between metals and non-metals by transfer of electrons e.g., NaCl, Question 54. Q6 Name two metals which react violently with cold water .Write any three observations which As opposed to _____ bonding in which a complete transfer If … However, the less reactive metals will not react with acids. Non-metals are themselves acceptors of electrons so there is no way they can donate electrons to the hydrogen ion of the acid. B) transfer of electrons. (e) Oxides of highly reactive metals cannot D) ionization of atoms. 2. Metals will react with an acid if the metal is above hydrogen in the reactivity series. A useful broad view of reactions between acids and bases involves the A) transfer of protons. Lewis acids and bases are commonly classified according to their hardness or softness. Many metals react directly with O 2 in air to form metal oxides. C) conversion of protons into electrons. B They react with all metals producing hydrogen. Reduction is gain (1 mark) of electrons. HNO 3 (d) School bells are made up of metals. This document is highly rated by Class 10 students and has been viewed 530 Oxidation is loss (1 mark) of electrons. All types of questions are solved for all topics. The salt will contain the cation formed from the metal and the anion of the acid. Q4 Show the formation of NaCl from sodium and chlorine atoms by the transfer of electrons. Jan 04, 2021 - Metals and Non-Metals Important Questions Class 10 Science Class 10 Notes | EduRev is made by best teachers of Class 10. Write any three observations you would make What kind of compounds are called Ionic compounds? 21. He holds bachelor's degrees in both physics and mathematics. When metals react with acids, bubbling is observed which is the hydrogen being produced. They are hence bad conductors of electricity. The reactivity of metals with acids varies, from metals which react vigorously to metals which do not react at all. Q5 Name the anode and cathode used in electrolytic refining of copper. Metals replace hydrogen from dilute acids, whereas non-metals do not. The metals at the top of the series, which have the greatest tendency to lose electrons, are the alkali metals (group 1), the alkaline earth metals (group 2), and Al (group 13). What happens when metals react with acids Metals react with acid to give salt and hydrogen gas. D. react with active metals to form H2 gas A. taste bitter Which is NOT a characteristic of bases? The more reactive the metal then the more vigorous the reaction will be. 18 What is not a typical characteristic of acids? Question 7. A. taste bitter B. turn litmus paper red C. react with acids to form … Bases are the chemical opposites of acids. Aluminum forms Al 3+ ions; the anion from hydrobromic acid is Br – , so the salt is AlBr 3 : Metals scan displace hydrogen from acids. Metals usually react with acids to give a salt of the metal and hydrogen gas. 1. Different metals react with acids at different rates. The higher up the series the more vigorous the metals will react. H 2 SO 4 (aq) → 2H + (aq) + SO 2- (aq) 2H + Most metals react with dilute acids. Question 2. electricity while non-metals do not have free electrons to move. Non-metals gain electrons to form negative -ions. Non-metals do not react with water (or steam) to evolve Hydrogen gas. (b) Non-metals cannot lose electrons so that H + ions from acids become hydrogen gas and can be displaced. E.g. 3. Neutralisation Acids react wth bases in a neutralisation reaction. In contrast, the metals at the bottom of the series Nonmetals form acidic oxides. Non-metals react with dilute acids to produce a gas which burns with a pop sound. Name two metals which react violently with cold water. Like acids that are not diluted, when exploring what happens when metals react with acids, not all metals will. Answer: Hydrogen from dilute acids can only be replaced if electrons are supplied to H + ions of the acid. But in the case of nitric acid (HNO3), copper does react with nitric acid as it is a strong oxidizing agent and the reaction is not as simple In the eighteenth century, it was recognized that acids have a sour taste, react with limestone to liberate a gaseous substance (now known to be CO 2), and interact with alkalis to form neutral substances. Only some metals react with water. 2. A= Acids react with metals to produce salts (1 mark) and hydrogen (1 mark). (c) Hydrogen gas is not evolved, when zinc metal reacts with dil. Metals react with acids to form a salt of the metal and elemental hydrogen, H 2 (g). Almost all metals react with oxygen. Metals above the copper in the reactivity series can react with dilute acids to form metal salts and hydrogen. Metals fon basic oxides. of metals from its ore is called metallurgy. Metals that are placed high on the reactivity series such as potassium and sodium are very dangerous and react explosively with acids. Name two metals, which will displace hydrogen from dilute acids, and two metals which will not. D They turn blue litmus paper 19 The familiar example of rusting involves the reaction C They react with carbonates producing carbon dioxide. Unit 4 Covalent Bonding Webquest Activity #1- Introduction to Covalent Bonding Open Chemical Bonding.Scroll down to the heading “Covalent Bonding.” 1. Why? Non – metals are electronegative and are unable to break the bond between H and O in water. A) transfer of protons. Zn + 2HCl – Zncl 2 – H 2 - Hydrogen gas is not evolved, when a metal reacts with HNO 3 … Generally, metals lose electrons easily, therefore most metals will react with acids. Beryllium is a good example. Copper, being an unreactive metal do not react with acids under normal conditions. All A They react with alkalis producing water. 2 Electrons move round the external circuit from the cathode to the anode. (b) Non-metals, in general, do not displace hydrogen from dilute acids. In this context hard implies small and nonpolarizable and soft indicates larger atoms that are more polarizable. Example is potassium reacts with dilute hydrochloric acid to give potassium chloride and hydrogen gas. Download a PDF of free latest Sample questions with solutions for Class 10, Chemistry, CBSE- Metals and Non-Metals . Non-metals cannot 4. 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