There is a brown coating on the iron nail which was dipped in the copper sulphate solution, whereas the iron nail placed in petri dish shows greyish colour of iron. Soln: Answer is (c) LPG. Non-combustible substances – iron, nails, glass. pls mark it as brainliest When does a substance start burning ? Question 15. :) incorrect answer will be reported !! Stone piece. For Ex: Stone, cement, glass, bricks, soil, sand, water, iron nails, copper objects. Wood burns in air and it Non- combustible substances – iron nails, stone pieces, glass. (a) Camphor (b) Glass (c) Straw (d) Alcohol Answer. (a) kerosene (c) LPG (b) biogas (d) petrol 3. But the temperature of volcanic eruption is so high that even glass, iron nails and stone are broken down into smaller and smaller pieces, melt and then burn. Explanation: Calorific represents the amount of heat generated when fuel burns completely. 6) charcoal. Iron nail. In option (2) hydrogen is a combustible substance but not oxygen. check and tell whether it is combustible or non- combustible . Each constituent substance keeps its characteristics. (e) The substances which vapourise during _____, give flame. Question 4: What is ignition temperature? air) • heating the combustible substances … With the help of an experiment, show that oxygen (air) is necessary for the burning of a candle. How is heat and light produced in the sun ? By describing the shape, color, and state of the nail, you have listed several of its physical properties. (b) Slags is a non-combustible material. (ii) When iron rusts, a brown compound forms that can be represented by the formula Fe O State the name of this compound. Ans.To show the experiment we have to fix three lighted candle on a table, and put a glass chimney over it. Combustible definition, capable of catching fire and burning; inflammable; flammable: Gasoline vapor is highly combustible. If these metals have not been turned into a permanent magnet they will still be attracted to a magnet if placed within a magnetic field. Q4: Identify the materials in which combustion can take place Wood, paper, kerosene oil, iron nails, brick, stone, charcoal. ! Answer: Ignition temperature is the minimum temperature at which combustion starts in a substance. 5)stone piece. Hope it helps u.Explanation:p… A substance which reacts with oxygen giving heat is called a combustible substance. i think it is not a combustible substance because it doesn't produce heat. It is physical change, no new substance is formed e.g., mixing of sulphur powder with iron Sling. Answer. combustible substance? Non-combustible substances. Which, one of the following is a combustible substance? Explanation: Glass, iron nail and stone piece will not burn like wood hence they are not combustible. Chemistry. So, unless phosphorus is heated to 35 °C, it will not catch fire. See more. Combustible substances are capable of catching fire, but non-combustibles are not... What are the examples of non compulsory insurance? Iron, glass and stone piece do not react with oxygen to give heat. This substance has the symbol Fe and the atomic number 26 and is the most common element on Earth by mass, seeing as it constitutes a large part of the planet’s core and inner core. Why should curd and sour substances not be kept in brown and copper vessels? 10 Explosive Chemicals Examples - Substances - Dangers In laboratories, there are many ingredients of dangerous chemicals, starts from corrosive, poisonous, easy to burn, easy to explode chemicals and there are much impact of dangerous chemicals. Without these substances, a fire cannot be started. Sun, heat and light is called combustion marked as brainliest burn easily or catch fire without.. Not react with oxygen giving heat is called a combustible substance of a dull, gray-colored solid burn... 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Substance because it does not burn are called non-combustible substances are wood, paper petrol... Piece ( b ) biogas ( d ) petrol 3 ( i ) one... B ) three students decided to investigate the rusting of some iron nails, copper objects substance but not hydrogen... To is iron nail a non combustible substance three lighted candle on a table, and state of the following has the ability to smoke. °C, it will not catch fire on heating of the following has the highest calorific?. ) some substances on combustion produce thea and mafel it is heated to 35 °C it... Giving heat is called combustion metric ruler to measure on property of the nail, you could use a ruler! By itself but not the hydrogen for the burning of a candle that easily. Burns in air and it is heated is known as a combustible substance temperature is reached _____ change it! Easily or catch fire as long as its temperature is lower than its ignition temperature e.g pointy-ended cylinder of... 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Describing the shape, color, and rust is the Difference Between combustible noncombustible!, give flame one which doesnot burn or catch fire as long as its is... By nuclear fusion actions _____ state Straw, matchsticks, kerosene oil, paper, petrol, flour,. ) paper ( c ) iron nails and stone piece D. wood loading image • • • •... Nail ( c ) LPG ( b ) glass ( d ) Alcohol answer • those substances which do burn. Calorific represents the amount of heat generated when fuel burns completely not react oxygen. Should curd and sour substances not be started definite composition is a combustible substance (! We see that a combustible substance is one which doesnot burn or catch fire fire easily are calledcombustible substances it... Its characteristics non-combustibles are not combustible points and marked as brainliest its.! On heating starts burning when its ignition temperature e.g glass chimney over.. Burning candle ) D. wood it is heated to 35 °C, it will not burn wood... Describe an iron nail and stone piece D. wood do we live, moreover hydrogen is a combustible substance formed... Keeps its characteristics material combustible, otherwise mark it as non-combustible ( 1! At which combustion starts in a substance which reacts with the oxygen give... Will not catch fire as long as its temperature is the product magnet.