what is ignition temperature for class 8

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Presence of a combustible substance: Combustion is only possible if the substance is combustible. Combustion and Flame Class 8 Science NCERT Textbook Questions. For example, a log of wood has higher ignition temperature than cut pieces of wood. Ignition Temperature. The lowest temperature at which a combustible substance catches fire when heated in the air is called its ignition temperature of a substance. State the conditions under which combustion occurs. Question from very important topics are covered by NCERT Exemplar Class 8.You also get idea about the type of questions and method to answer in your Class 8th examination. Attainment […] (c) attainment of ignition temperature of the substance. Iron nail b. Eileen Tang -- 2005 prefaces Class 8 Science Solved Q&A. In this chapter, the students will learn about combustion, types of combustion, flames, the structure of a flame. Presence of a supporter of combustion: Adequate supply of a supporter of combustion (e.g., oxygen) is essential for combustion. (d) 9. Continue Reading. Students can solve NCERT Class 8 Science Combustion and Flame MCQs Pdf with Answers to know their preparation […] Science MCQs for Class 8 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Unlike with flash points, the ignition temperature does not need an ignition source. It is also used to characterize the fire hazards of fuels. A class that stores temperature information, and allows conversion between different units. Water is a very good fire extinguisher as it cools down the fuels such as wood below its ignition temperature. We have provided Combustion and Flame Class 8 Science MCQs Questions with Answers to help students understand the concept very well. The lowest temperature at which a substance catches fire is called its ignition temperature; Certain substances have very low ignition temperature and can easily catch fire with a flame are called inflammable substances like petrol, LPG etc. 8 Which one of the following is combustible? NCERT Exemplar for Class 8 Science Chapter 6 Combustion and Flame Multiple Choice Questions 1. Sujit took four different beakers I, II, III, and IV each containing 1 litre water. Reply. Q11: Different substances catch fire at different _____ View Answer. NCERT Exemplar Class 8 Science is very important resource for students preparing for VIII Board Examination. More... #include (ii) Presence of O2 (supporter of combustion) (iii) Heating to its ignition temperature. 2. We know, if the temperature of the fuel will be lower than the room temperature, the tn i can ... CBSE Class 8 Science Chapter 6 Combustion and Flame Objective Questions . Difference between types of fuels has been explained. II. Question 1. This shows that ignition temperature of kerosene oil is lower than that of wood. The flash point of a volatile liquid is the lowest temperature at which it can vaporise to form an ignitable mixture in air. Science In Everyday Life Solutions for Class 8 Science Chapter 5 Combustion And Fossil Fuels are provided here with simple step-by-step explanations. What are the Conditions Necessary for Combustion Conditions Necessary for Combustion The following conditions are necessary for combustion to take place. Ignition temperature: The minimum temperature at which combustion starts in a substance is called ignition temperature of that substance. These solutions for Combustion And Fossil Fuels are extremely popular among Class 8 students for Science Combustion And Fossil Fuels Solutions come handy for quickly completing your homework and preparing for exams. Also, he took four fuels W, X, Y, and Z. NCERT Exemplar Solutions for Class 8 Science Chapter 6 Combustion and Flame is provided here in PDF format. Inflammable substances have very low ignition temperature. CBSE Class 8 Science, CBSE- Combustion and Flame. Inflammable Substance: A substance which has very low ignition temperature so that is can easily catch fire is called an inflammable substance, e.g. Glass c. Stone pieces d. Paper Ans.8. Booster 2. 2 ranges from 527 to 558 Kelvin, and Diesel fuel No .4 is 536 Kelvin. 4. Combustion and Flame Class 8 Science Chapter 6 as per NCERT Book used in CBSE and other Schools. A substance which reacts with oxygen giving heat is called a combustible substance. Class 8 Science Chapter 4 Combustion and Flame Combustion and Flame Combustion Process of giving off heat by a substance after reaction with oxygen is called combustion. Why does the fire goes off when water is poured over burning wood? Combustion and Flame class 8 living science solution A. Formative and Summative Assessment 1. Answer. Define the ignition temperature of a substance. Check the below NCERT MCQ Questions for Class 8 Science Chapter 6 Combustion and Flame with Answers Pdf free download. The lowest temperature at which a substance catches fire and undergoes combustion liberating heat and light is called ignition temperature. The lowest temperature at which a Substance catches fire is called its-a. Answer: (B) petrol, alcohol, etc. Class 8 - Science - Combustion and Flame (Q & A) COMBUSTION AND FLAME (Questions and Answers) Q1. The ignition temperature of Diesel fuel No.1 ranges from 450 to 602 Kelvin, Diesel fuel No. Ignition temperature is the lowest temperature at which a combustible substance catches fire. Boiling point b. Melting point c. Ignition temperature d. Critical temperature Ans.9(c) 10. If several different flammable materials may be present within a particular area, the material that gives the lowest auto ignition temperature dictates the overall area classification, and hence T-class. Fire can be controlled by removing one or more requirements essential for producing fire. Fuels. Good fuels have a. low ignition temperature and high calorific value. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 8.. With an increase in pressure the autoignition temperature … View Answer. a. Download a PDF of free latest Sample questions with solutions for Class 8, Science, CBSE- Combustion and Flame . Temperature codes have built-in safety factors. EDUCATION YouTube Heat | Ignition Temperature | Combustion and Flame Class 8 Science | CBSE | NCERT By admin 8 mins ago . I. Class 8 Chemistry Combustion and Flame: Ignition temperature: Ignition temperature. View Answer. The flash point is a descriptive characteristic that is used to distinguish between flammable fuels, such as gasoline (also known as petrol), and combustible fuels, such as diesel.. Solution: Ignition temperature is the lowest temperature at which a substance catches fire. Flash point - the lowest temperature at which vapour of a volatile material can be ignited whit an ignition source present; Values of autoignition temperature are generally higher than flash point, as given for pure hydrocarbons in the tables and figures below . c. high ignition temperature and high calorific value. Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 6 Combustion and Flame. Heat | Ignition Temperature | Combustion and Flame Class 8 Science | CBSE | NCERT. Answer: Combustion can take place in the presence of: (a) a combustible substance. 5. 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