Answer: Give an example of a metal which Question 20 These solutions provide answers to all the exercise questions present at the end of chapter 3 metals and non-metals from NCERT Class 10 Science textbook. HNO3 and a mixture of cone. Answer: Poor conductor of heat and electricity except graphite. For e.g. These metals have a lot of luster and they are malleable and ductile in nature and also high corrosion resistance in nature. NCERT Solutions for Class 10 Maths Chapter 3 is the ideal, easy step by step guide for mathematics. These minerals arc called ores. By losing two electrons, the two sodium atoms form tow sodium ions (2Na+). Generally hard except sodium, lithium & potassium .These are soft and can be cut with knife. (c) (ii) and (iii) A man went door to door posing as a goldsmith. Name two metals that are found in nature in the free state. Sodium is highly reactive. Use the Table above to answer the following questions about metals A, B, C and D. (i) Metal B is the most reactive as it gives displacement reaction with iron (II) sulphate. Does every mineral have a definite and a fixed composition? Cu(s) + 2AgNO3 (aq) → Cu(NO3)2 (aq) + 2Ag (s). Ni, & Cr), amalgam (alloy of Hg), brass (alloy of Cu & Zn) etc. Everything is presented in a way that students … Answer: (iii) In Na2O, ions present are Na+ and O2-. … Zinc is more reactive than iron. These solutions are easy to access and easy to understand. 9. All the questions and answers that are present in the CBSE NCERT Books has been included in this page. This solution contains questions, answers, images, explanations of the complete Chapter 3 titled Metals and Non-metals of Science … (ii) moist litmus paper ? An, Ag. (a) How could you use them to distinguish between samples of metals and non-metals? (iii) What are ions present in these compounds? What are alloys ? Can you play the detective to find out the nature of the solution he has used ? On the other hand if we beat non-metals they break down and they cannot be drawn into sheets as they are non-malleable. Question 2 i. (i) Dry litmus paper        –   no action. Metals and nonmetals class 10 Question 8. The 10th standard is one of the most important milestones of a student’s life. Formation of Sodium oxide NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effect of Electric Current intext questions on Page 224, Page 228, Page 229, Page 231, Page 233, Page 236, Page 237, Page 238 and Exercises are given. By losing 2 elections, the magnesium atoms form a magnesium ion (Mg2+) and by gaining 2 electrons, the oxygen atom forms an oxide ion (O2-). Solution: Copper is used to make hot water tanks and not steel (an alloy of iron) because copper does not reacts with either water or steam whereas iron reacts with steams to corrode the tank. Physical Properties of Metals And Non-Metals. Answer: i. (a) Calcium. NCERT Books chapter-wise Solutions (Text & Videos) are accurate, easy-to-understand and most helpful in Homework & Exam Preparations. Why do ionic compounds have high melting points ? The solutions are helpful to understand the method of answering the questions in the board exams. 5. Metals A+ Salt solution of B →  salt of A+ Metal B. K > Na> Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au. Solution: Hydrogen gas is liberated when dilute HCl is added to a reactive metal. (c) Applying a coating of zinc (b) Sodium, potassium and lithium are stored under oil. Copper reacts with moist carbon dioxide in the air to form copper carbonate and as a result, copper vessel loses its shiny brown surface forming a green layer of copper carbonate which is basic in nature. All minerals are not ores but all ores are minerals. Carbonate and sulphide ores are usually converted into oxides during the process of extraction. Which gas is produced when dilute hydrochloric acid is added to a reactive metal ? Gold and Platinum. Chapter 3 Metals and Non Metals,  is derived from the NCERT textbook of Class 10 Science as prescribed in CBSE Schools of India. Question 25 (b) Au (a) B Ex: N2O5 or N2O3 is an acidic oxide; CO is a neutral oxide. Can you play the detective to find out the nature of the solution he had used? Gold & silver are the most malleable metals. (c) CU(NO3)2 Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Social Science Economics for Class 10 so that you can refer them as and when required. 5. The carbonate ores are changed into oxides by heating strongly in limited air which is known as calcination. (b) zinc has a higher melting point than tin Your email address will not be published. Chapter 10 Light Reflection and Refraction are one of the important chapters in Class 10 Science and the expected marks weightage of the chapter according to the latest marking scheme is 7 marks. What chemical process is used for obtaining a metal from its oxide. Protective metal oxide layer prevents the metal from further oxidation such as found in Al, Zn, Pb etc. Reason- HNO3 is strong oxidizing agent & oxidized H2 to water. Which of the following methods is suitable for preventing an iron frying pan from rusting ? Metals and nonmetals class 10 Question 6. steel, brass, bronze, etc. (d) Student C At some places, minerals contain a very high percentage of a particular metal and the metal can be profitably extracted from it. NCERT Solutions Class 10 Hindi Chapter 3 साना-साना हाथ जोड़ि. The results obtained have been tabulated as follows : Use the Table above to answer the following questions about metals A, B, C and D. 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