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