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