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NCERT Solutions For Class 10 Science Chapter 3: Metals and Non-Metals (Download PDF)
Get NCERT Class 10 Science Chapter 3: Metals and Non-metals. Students must learn all the topics given in this chapter thoroughly as questions in CBSE board exams are generally based on the NCERT. This NCERT Class 10 Science Chapter 3 is from the latest edition of NCERT Science book published for session. About NCERT Class 10 Science Chapter 3.� We are also providing here the accurate and exclusive NCERT solutions for chapter 3 of Class 10 Science NECRT book. Students must go through these detailed solutions to understand all the concepts clearly and manage their exam preparations in an efficient manner. All our NCERT books and solutions are reviewed by the subject experts to bring the reliable and error free content for students. NCERT Class 10 Science Solutions for Chapter 3.� 5. What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place. Answer. When zinc is added to iron (II) sulphate then it will displace the iron from iron sulphate solution as shown in the following chemical myboat270 boatplans (s) Ncert Solutions For Class 10th Science Chapter 3 Visa + FeSO4 (aq) > ZnSO4 (aq) + Fe (s). Page No: 1. (i) Write the electron-dot structures for sodium, oxygen and magnesium. (ii) Ncert Solutions For Class 10th Science Chapter 7 Quad Show the formation of Na2O and MgO by the transfer of electrons. (iii) What are the ions present in these compounds? Answer. Science textbook of Class 10th deals with the disciplines such as Physics, Chemistry, Biology and Environmental Science as integrated. There is no sharp division made by the NCERT in the textbook. However, as per the examination point of view, we can divide this book into three parts Physics, Chemistry and Biology. Environment Science part is covered in the Biology syllabus. You can select your desired chapter from the list and start your learning. Class 10 Science NCERT Solutions is the best way to accelerate your preparation. You can find NCERT Solutions for Class 10 Maths which will sharpen.

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 is 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 compounds have high melting points. There are solids due to strong force of attraction between oppositely charged ions resulting in the formation of hard crystalline lattice.

An alloy is a homogeneous mixture of 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 involves various processes starting with the treatment of ore to getting metals in the pure form. Question 1: Compare the properties of a typical metal and non-metal on the basis of the following: i nature of oxide formed by them ii conductivity.

Answer : i Metals from basic 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 very high percentage of a particular metal and the metals can be profitably and economically extracted, then it is called an ore. Question 1: Atmospheric air always 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 reactivity of metals? Answer 2: When metals react, they lose electrons to form 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 electrons 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 very reactive metals because it readily loses one electron, forms a positive ion which then combines with other substances.

On the other hand, lead atom loses electrons with difficulty to form positive ions, so lead metal is Class 10th Science Chapter 7 Ncert Solutions Uk 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 of zinc metal, which prevents the iron to come in contact with oxygen and moisture.

Hence, rusting is prevented. Why are aluminium and copper metals used for making cooking vessels? Why is sodium kept immersed in kerosene oil? Sodium is very reactive. If kept exposed to air, it catches fire. Distinguish between calcinations and roasting. Ionic compounds have high melting point. 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 metals which will not. Metals that are more reactive than hydrogen displace it from dilute acids.

For example: 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 air cannot come into direct contact with iron. Platinum, gold and silver are used to make jewellery. Platinum, gold, and silver are used to make jewellery because they are very lustrous.

Also, they are very less reactive and do not corrode easily. Why are Sodium, potassium and lithium stored 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 to make utensils for cooking. Though aluminium is a highly reactive metal, it is resistant to 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 �.

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