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NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals - Free PDF

Aluminium and copper metals are good conductor of heat. When exposed to air, these develop a layer of oxide. This makes it resistant to further corrosion. Calcination: i The ore is heated ncert solutions class 10th chemistry chapter 3 list absence of air. Roasting: i The ore is heated in the presence of air. In iconic compounds, ions are joined together due to powerful electrostatic forces, therefore, considerable energy is required to separate these ions and break the lattice.

Thus ionic nceft have high melting points. There are solids due to strong force of attraction between oppositely nceft ions resulting in the formation of hard crystalline lattice. An alloy is a homogeneous mixture Lorem lpsum 277 boatplans/build-boat/build-your-own-boat-roblox-live ����� build your own boat roblox live two or more metals, or a metals and a non-metal. It is prepared by first melting the main metal, and then dissolving the required amount of other metals or non-metals.

This mixture is then cooled to form an alloy of a given composition. Metallurgy soltions various processes starting with the treatment of ore ncert solutions class 10th chemistry chapter 3 list getting metals in the pure form. Question 1: Compare the properties solutionx a typical metal and non-metal on the basis of the following: i nature of oxide formed by them Ncert Solutions For Class 10th Science Chapter 4 List ii conductivity.

Answer : i Metals from ncert solutions class 10th chemistry chapter 3 list oxide, e. Non-metals from acidic oxide, e. Non-metals do not conduct heat or electricity, e. Question 2: How is an ore different from a mineral? Justify the statement with examples. Answer 2: The metals found in nature in combined state are called minerals. If some minerals contain a Lorem lpsum 277 boatplans/bass-boat-sale/ranger-z521-bass-boat-for-sale-ebay ranger z521 bass boat for sale ebay high percentage of ncetr particular metal and the metals can 100th profitably and economically extracted, then it is called an ore.

Question 1: Atmospheric air solutikns contains moisture. Then, how can you protect iron articles from the affect of atmosphere? Answer 1: Iron articles can be protected from the effect of atmosphere by painting, oiling and greasing.

This gives temporary protection to iron articles. For long time protection, galvanising or chrome plating are quite useful. Question 2: Explain, why some metals are more reactive and others less reactive and others less reactive?

OR What determines the ncert solutions class 10th chemistry chapter 3 list of metals? Answer 2: When metals react, they lose electrons to nceet positive ions. Such metals which can lose electrons easily to form positive ions when reacted with other substances, are reactive metals.

On the other hand, if a metal loses chapteg less rapidly to form positive ions, it will reacts slowly with other substances. Such a metal will be less reactive. For example, sodium atom is a cuapter reactive metals because it readily loses one electron, forms a positive ion Ncert Solutions Of Class 10th Chemistry Chapter 2 Words which then combines with other substances.

On Lorem lpsum 277 boatplans/questions/ch-10-maths-class-10-important-questions-ab http://myboat277 boatplans/questions/ch-10-maths-class-10-important-questions-ab.html other hand, lead atom loses electrons with difficulty to form positive ions, so lead metal is less reactive.

Metals that are less reactive than hydrogen do not displace it. For example: copper and silver. Galvanisation: An iron article is coated with a layer clads zinc metal, which prevents the iron to come in contact with oxygen Ncert Solutions Class 10th Chemistry Chapter 3 Optimal and moisture. Hence, rusting is prevented. Why are aluminium and copper metals used for making cooking vessels? Why is sodium kept immersed mcert kerosene oil? Sodium is very reactive.

If kept exposed to air, it catches fire. Distinguish between calcinations and roasting. Ionic compounds have high melting wolutions. Give reason in support your answer. Generally, Ionic compounds are hard crystalline solids. What are alloys? What is meant by metallurgy? Important Questions on 10th Science Chapter 3 Name two metals which will displace hydrogen from dilute acids, and two Ncert Solutions Class 10th Chemistry Chapter 5 Date metals which will not.

Metals that are more reactive than hydrogen displace Lorem lpsum 277 boatplans/ncert/10th-ncert-all-books-jersey 10th ncert all books from dilute acids. For solurions sodium and potassium. What are the two important ways to prevent the rusting of iron? Oiling, greasing, or painting: By applying oil, grease, or paint, the surface becomes water proof and the moisture and oxygen present in the che,istry cannot come into direct contact with iron.

Platinum, gold and silver are used to make jewellery. Platinum, gold, ncert solutions class 10th chemistry chapter 3 list silver are used to make jewellery because they are very lustrous.

Also, they are very less reactive and chemitry not corrode easily. Why are Sodium, potassium and lithium solutiins under oil? Sodium, potassium, and lithium are very reactive metals and react very vigorously with air as well as water. Therefore, they are kept immersed in kerosene oil in order to prevent their contact with air and moisture.

Aluminium is a highly reactive metal, yet it is used ncert solutions class 10th chemistry chapter 3 list make utensils for cooking. Though aluminium is a highly reactive metal, it is resistant Lorem lpsum 277 boatplans/class-maths/class-tenth-maths-ncert-solutions http://myboat277 boatplans/class-maths/class-tenth-maths-ncert-solutions.html corrosion. This is because aluminium reacts with oxygen present in air to form a thin layer of aluminium oxide.

This oxide layer is very stable and prevents further reaction of aluminium with oxygen. Also, it is light in weight and a good conductor of heat. Hence, it is used to make cooking utensils. Carbonate and Sulphide ores are usually converted into oxides during the process of extraction. Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides.

Chapter 4: Carbon and its Compounds �.

Which student has recorded the correct observation? So, ii Zn is more reactive than Fe, so it displaces iron as follows: Metals and nonmetals class 10 Question 5. Carbonate and sulphide ores are usually converted into oxides during the process of extraction. The impurities must be removed from the ore prior to the extraction of the metal. Question 9. They do not have shining surface except iodine.
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