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