Explain with examples. Metals have generally _____ melting and boiling points. For example, 12. CopperCopper, gold and silver are known as noble metals. Copper, a chemical element that is a reddish, extremely ductile metal and an excellent conductor of electricity and heat. Metals are sonorous and used in ringing bells whereas non-metals are non-sonorous and cannot be used in ringing bells. 6. True (j), IV. That is why metals are used in ringing bells. (c) Aluminium (b) chlorine (c) the reactions of dilute acids with metals and how these relate to the metals' position in the reactivity series; England. True or False Metal oxides are Answer: (f) Question 4. All of these metals react vigorously or even explosively with cold water. (c) sonorous With the help of equations, explain the reaction of non-metals with oxygen. (c) acidic Which metal is more reactive: Iron or zinc? Suggest an activity to arrange sodium, magnesium and copper in the order of their decreasing reactivity. Answer: Answer: Question 9. (d) None of these A colourless solution of NaOH is formed. Metal C does not react with cold water or hot water, but does react with dilute acid. These reactions are called combustion reactions. What are main uses of metals? So if we start with cyclohexene-- let's go ahead and draw cyclohexene in here. This is the MPD file used: ... Can nitrous dioxide develop when copper and dilute nitric acid react? Question 3. (a) We must see the carat of gold jewellery, current price and BIS hallmark on it. In reactions where the acid is a hydrogen-ion-containing compound and the base is a hydroxide-ion-containing compound, water is also a product. (c) both metals and non-metals Generally, non-metals do not react with acids. False Metals above hydrogen on the reactivity series will react with dilute acids. Answer (1 of 11): Its copper as it is less reactive than hydrogen and a less reactive metal can't displace the higher reactive metal from its chlorideand all other are more reactive than hydrogenmagnesium reacts with hydrogen chloride to form magnesium chloride and displaces hydrogenaluminium forms aluminium chloride and displaces hydrogen andiron reacts to form ferric chloride Question 15. The … (d) Answer: Why some metals displace other metals from their solution? Reactions of acids with metals. (d) aluminium, Question 15. Answer: If anything goes wrong, chat with us using the chat feature at the bottom right of this screen. Answer: The equation is State whether the given statements are true or false. What happen when a copper vessel is exposed to moist air for long? Acids produce carbon dioxide when reacted with carbonates. Sulphuric acid to liberate sulphur dioxide gas as per the equation — Hope it helped ! ... tend to darken with exposure to air (forming Mn(III) species), a dash of H2O2 cleans this up. The equation are as follows: Transmetallation proceeded 8. 14. 5. The most reactive metal is Will you observe any colour on adding copper turn-ing in it? Name the gas evolved when sodium hydrogen carbonate is made to react with dilute hydrochloric acid. Gold, silver and platinum do not react with water. Difference between metals and non-metals on the basis of their physical properties. a. 7. Dilute hydrochloric acid. Non-metal like iodine is used in the purple coloured solution applied on wounds. (c) Potassium Iron (Fe) and copper (Cu) get rusted when react in presence of oxygen and water (moist air). Metal hydroxide b. (a) Aluminium What are the main uses of non-metals? Which of the following non-metals are used in fertilisers? asked Oct 25, 2017 in Class X Science by aditya23 ( … A metal activity series places metals in order of relative reactivity, from most reactive to least reactive: Question 1. Due to their thermal and electrical conductivity, metals are use to make utensils, cooking vessels, wires and appliances. Most of the metal oxides are basic in nature, they dissolve in water forming hydroxides. (d) all of these, Question 9. acids (dilute or concentrated) are mostly composed of non-metals (with some exceptions), and, therefore, also want to add electrons. All metals are hard except _____ and _____. What happens when [KVS 2008] 3. 6. The pH scale ranges from zero to 14, with a pH of 7 being neutral, a pH less than 7 being acidic, and a pH greater than 7 being alkaline. (d) Zinc, Question 8. 2. non-metal (a) Graphite Non-ipetals Action with dilute acids. Will it be still wanted? Difference between metals and non-metals on the basis of their chemical properties. Thin sheets can be obtained by this process. Question 24. The locations of the deposits of these metals may be shown on the map of India. Take a small piece of magnesium ribbon and add warm water to it. True Make sure they are in contact with the zinc. Answer: Which of the following metal is stored in kerosene? Examples of metals that … False (iv) Reaction with acids and bases: Generally, non-metals do not react with acids and bases. Following is the general equation for such metals. Answer: (b) Silicon (e) Sodium and potassium do not react vigorously with water and oxygen. (a) react with water Metals react with dilute mineral acid to liberate hydrogen. Answer: Fluoroantimonic acid is the world’s strongest acid, proudly standing on the pedestal slightly above carborane. (a) (d) Answer: How do metals and non-metals react with water? (d) sodium, Question 14. Substances having characteristic properties like malleability, ductility, sonority, conductivity, lustre, – and solidness are called metals. What are non-metals? 9. Add a few copper turnings to test tube 2. (a) Sulphur Name the property due to which metals shine. (d) None of these, Question 13. Answer: Explain chemical properties of metals with examples. The equa­tion of the re­ac­tion is: 2Al + 6HCl = 2Al­Cl₃ + 3H₂ (c) Phosphorus However some metals like alu-minium, zinc and lead react with strong bases like sodium hydroxide to make complex salts and produce hydrogen. The activity series is a useful guide for predicting the products of metal displacement reactions. A doctor prescribed a tablet to a patient suffering from iron deficiency. Like metals, non-metals also play an important role in our lives. Answer: The reaction between copper oxide and nitric acid forms copper nitrate and water. 1. good conductors, electricity Name some common non-metals. Match the following Such metal oxides which r eact with both acids as well as bases to produce salts and water are known as amphoteric oxides. They, generally, do not react with water. Zn + H 2 SO 4 ⇨ ZnSO 4 + H 2. What is reactivity series? 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. (v) Displacement reactions: More reactive metals displace less reactive metals. For example, (c) (b) Gold and silver, Question 21. Metals like iron and steel are used in various tools, machinery, pipes, rods, sheets, doors, windows, construction works like bridges, roads, buildings, etc.. Aluminium is used as packaging and wrapping materials. (d) Metals react with acids to produce hydrogen gas. (b) Oxygen Non-metals do not react with water. 15. (i) Reaction with oxygen: Non-metals react with oxygen to form acidic oxides. Answer: Question 4. 4. 9. sodium, potassium (b) What standard you must see on gold ornaments? For example, placing a strip of zinc metal in a copper (II) sulphate solution will produce metallic copper and zinc sulphate, since zinc is above copper on the series. > Here is a picture of the activity series. Zinc sulphate forms a colourless solution in water. (a) bromine (b) Sulphur Metals react with acids to form respective salts along with evolution of hydrogen gas that burns with a pop sound. (c) both (a) and (b) 4. Metal, Question 19. or Answer: 2. Metals also react with dilute acids such as. Imagine that gold is reactive like copper. it has to do with the number and placement of valence electrons. They follow a simple replacement reaction and any metal which is above hydrogen in the reactivity series will replace it and create its own compound. (a) hydrogen gas Ans . Question 8. Answer: These acids are so strong that they aren’t even considered conventional acids; … (d) none of these, Question 20. Answer: If there is a mercury spill, we must leave the area immediately and inform our parents or teachers. You can do this yourself with the help of electric tester. 1. ... Metals do not react with hydrogen but non-metals react with hydrogen to form hydrides. The metals like Cu,Au,Ag are less reactive than hydrogen.They do not displace hydrogen from dilute acids. 7. It uses these reactions to explore the trend in reactivity in Group 1. An index card is used for recording and storing small sizes of discrete data. For example, aluminium, copper, zinc, iron, etc. Rust formed on iron object is acidic in nature. Metal compound A reacts with dilute hydrochloric acid to produce effervescence. If you are hard set on dissolving MnO2 per se, you might be able to find a salt which can. No, because copper is less reactive than zinc and will not be able to displace zinc from its salt solution. Zinc Answer: (a) Gold All metals above hydrogen in the activity series will displace hydrogen from an acid. 5. Answer: Answer: Match the items given in column I suitably with those given in column II. In a re­ac­tion with hy­drochlo­ric acid, re­lease of hy­dro­gen is ob­served. If gold becomes reactive like copper then its use in ornaments will decline. (a). 3. When a metal reacts with oxygen, a metal oxide forms. Which substance is used for making pencil lead? How will you test the gas ? Answer: All the gases are non-metals. How¬ever, sometimes some complex reactions take place between non-metals and bases. It will react with hydrochloric acid to form manganese chloride, chlorine and water. Choose the correct option. Perform the experiment and prepare a short report on the results. This equation is written as: Zn + H 2 SO 4 ZnSO 4 + H 2 (b) A balanced chemical equation has an equal number of atoms of different elements in the reactants and products. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. e.g. (c) copper Zn + 2HCl(dil.) GCSE. (d) Some metals will react with oxygen when they burn. Question 1. Barium sulphate does not dissolve in hydrochloric acid. But some jewellers mix a large quantity of copper and silver in gold to earn more profit. Introduction to Bases. 3. Blue colour solution of copper sulphate has changed to green colour of ferrous sulphate. If it get into the food chain, it leads to mercury poisoning. Many metals including alkali metals, alkali earth metals, chromium, nickel and zinc react with dilute hydrochloric acid. Name two physical properties of metals. Alkaline Substance Examples. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Ductility is one of the properties of metals due to which they can be drawn into wires. (iii) Reaction with water: Non-metals do not react with water. Acid's share certain properties (turn litmus paper red, react with some metals) because of the presence of hydrogen ions. 7. It can be beaten into thin sheets and can be folded into any shape. 15. _____ and _____ are kept in kerosene to avoid explosion. 11. What are the physical properties of non-metals? Magnesium reacts very slowly with cold water. 4. Metals react with acids to form respective salts along with evolution of hydrogen gas that burns with a pop sound. (b) Phosphorus It is also used in aircrafts and automobiles, etc. Answer: (ii) Reaction with water: Metals react with water to form their oxides or hydroxides. Question 23. _____ are used in medicines as antiseptic. Answer: Free Online CBSE Class Notes, NCERT Solutions, Self Study material for Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12 (b) Why mercury is used in thermometers? Multiple Choice Questions (MCQs) 8. Because of this, the metals that react with this acid usually do not form hydrogen gas, but oxides of nitrogen instead. (b) generally liquids Two interpretations of implication in categorical logic? It is a very dangerous metal as its density is very high. These metal oxides and their hydroxides neutralise acids but do not react with bases. I. Hydrogen, oxygen, carbon, sulphur, phosphorus, etc. Observe the brightness of the lighting bulb. Answer: Answer: Answer: How are metals useful to us? (b) Non-metal oxides are _____ in nature. The gas evolved extinguishes a burning candle. Whose oxides are basic in nature: Metal or non-metal? Answer: 12. Zn + CuSO4 → ZnSO4 + Cu. Non-metals: Graphite, sulphur, oxygen, Question 22. 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