(i) Why is aluminum used to reduce metal oxides like Fe 2O 3? (iii) Why is Al obtained only by electrolytic reduction of Alumina (pure)? Question 20 (ii)Why are aluminum containers used to transport nitric acid? (i)How does roasting differ from calcinations? Give equations. (ii) Name the by- product formed during roasting and give one of its uses. (ii) In metallurgy, what does the term 'Roasting' stand for? (i)In metallurgy what do the terms gangue, flux, slag stand for? Give examples. How will you concentrate this ore? Question 18 (iii)An ore gave SO2on heating with oxygen. (ii)Name the types of reduction processes involved in metallurgy with an example for each. (i)Carbonates and sulphide ores are usually converted into oxide ores, why? What are the three major steps involved in extraction of a metal after its ore is mined? Question 7 How does the term "Ore" differ from "Minernal" ?. State the reason and give equation of chemical reaction involved. After few days when the zinc rod was taken out of the solution, a number of small holes were noticed in it. On examining, it was found that the blue color of the solution had faded. Question 12Ĭan carbon dioxide react with magnesium? Question 13Ī zinc rod was kept in a glass container having CuSO 4 solution. What is the behavior of magnesium when it is heated and steam is passed over it? Represent the equation. this oxide dissolves in water and turns blue litmus red. Question 10Īn element X on reacting with oxygen forms an oxide X2O. Also name the metal that lies just above hydrogen in the reactivity series. Name the metal which occurs below copper in the reactivity series. Metals replace hydrogen from acid, whereas non-metals do not. Why are the two non- metals, carbon and hydrogen are important chemical reference points with regard to the method of metal extraction and reactivity towards acids. Name two metals which can displace hydrogen from dilute HCI. Give the chemical equation of the reaction involved. After certain time silver from the solution was deposited on the copper plate. What is the method of refining them? Question 5Ī copper plate was dipped in AgNO 3 solution. (iv)Name two metals that occur in a free state nature. (iii)In metallurgy, what do the term calcinations stand for? Give example? (ii)Give two metallurgical facts that justify placing magnesium above iron in the activity series. (i)Arrange the following metals in the decreasing order of chemical reactivity placing the most active first. A metallic chloride that is soluble in hot water but insoluble in cold water. A metal whose chloride and sulphate salts are both insoluble A brittle metal, which is used to galvanize iron (ii)Name two common alloys of zinc with their property and uses. (i)Name the two ores of zinc commonly used. A metal added to gold to harden it Question 2 A metal used in long distance cables wires A metal that forms two types of oxides and rusts in moisture write their formulae also A molten metal that catches fire in chlorine gas and gives off white fumes Hope you like them and do not forget to like, social shar In this page we have Class 10 Science Metals and Non Metals Practice Worksheet.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |