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Can you burn a piece of wood by bringing a lighted matchstick near it explain

Thus it is not possible to burn a piece of wood by simply bringing a lighted matchstick nearby it. But if the wood is heated then you cannot burn it with a matchstick, because wood has higher ignition temperature which cannot catch the fire from a single matchstick Answer No we cannot burn a piece of wood by bringing a lighted matchstick near it. When a lighted matchstick is brought near a piece of wood it does not start burning because the ignition temperature of wood is higher than a piece of paper. A matchstick can light a tiny splinter of wood but not a big log of wood Question 15: Can you burn a piece of wood by bringing a lighted matchstick near it? Explain. Answer: The ignition temperature of a piece of wood is high which cannot be reached by the small heat produced by a burning matchstick. So, a matchstick cannot light (or burn) a piece of wood directly

32: Can you burn a piece of wood by bringing a lighted matchstick near it? Answer: The piece of wood cannot burn by bringing a lighted matchstick near it. It is because the heat produced by matchstick is not sufficient to attain the ignition temperature of wood. So we use paper or kerosene oil to start fire in wood piece. 33: We can boil water. Answer: A matchstick can light a tiny splinter of wood but not a big log of wood. A splinter of wood has a low ignition temperature. A burning matchstick can produce sufficient heat to reach the ignition temperature of the splinter of wood therefore a matchstick can light a splinter of wood directly No, you cannot burn a piece of wood by bringing a lighted matchstick near it, because wood has high ignition temperature and so it requires longer time to start burning, whereas the lighted matchstick extinguishes very soon. Q.5. Why do you have to use paper or kerosene oil to start fire in wood or coal ? Ans

Can you burn a piece of wood by bringing a lighted

No, because wood has high ignition temperature and it requires to be heated for longer time to start its burning. Whereas the lighted matchstick extinguishes very soon. Question 5. Why do you have to use paper dr kerosene oil to start fire in wood or coal No, because the wood has high ignition temperature and it requires to be heated for a longer time to start its burning. Lighted matchstick extinguishes before the wood can reach its ignition temperature. Question 11. Why do you have to use paper or kerosene oil to start a fire in wood or coat

The ignition temperature of a piece of wood is high which cannot be reached by the small heat produced by a burning matchstick. So, a matchstick cannot light (or burn) a piece of wood directly. Q37. How forest fires occur during the hottest summer days Q32: Can you burn a piece of wood by bringing a lighted matchstick near it? Ans. The piece of wood cannot burn by bringing a lighted matchstick near it. It is because the heat produced by matchstick is not sufficient to attain the ignition temperature of wood. So we use paper or kerosene oil to start fire in wood piece. Q33: We can boil water. Can you burn a piece of wood by bringing a lighted matchstick near it? Explain. Answer: A matchstick can light a tiny splinter of wood but not a big log of wood. A splinter of wood has a low ignition temperature. A burning matchstick can produce sufficient heat to reach the ignition temperature of the splinter of wood therefore a matchstick can. 23. Can you burn a piece of wood by bringing a lighted matchstick near it? Explain. Answer No we cannot burn a piece of wood by bringing a lighted matchstick near it. When a lighted matchstick

Lakhmir Singh Science Class 8 Solutions For Chapter 6

Does a matchstick burn by itself? How does it burn? You must have had an experience of burning a piece of paper. Does it burn when a burning matchstick is brought near it? Can you burn a piece of wood by bringing a lighted matchstick near it? Why do you have to use paper or kerosene oil to start fire in wood or coal? Have you heard of forest fires Using tongs, pick up a small piece of paper and bring it near to the lighted candle and keep it on flame as shown in figure-1. Record your observation in table 1. Fig-1 Carry out this experiment with a piece of charcoal, magnesium ribbon, straw, cotton cloth, nylon cloth, dry wood, pebble, wax, plastic piece etc, and record your observations.

Combustion and Flame Class 8 Science Extra - Study Pat

Can you think of the Can you burn a piece of wood by reason why it stops burning? bringing a lighted matchstick near it? Why do you have to use paper or You might have heard that when the kerosene oil to start fire in wood or coal?clothes of a person catch fire, the person Have you heard of forest fires Bring a lighted matchstick near the other end of the glass tube. You will see the flame. Notice that the wax near the heated wick melts quickly. The substances which vapourise during burning, give flames. For example, kerosene oil and molten wax rise through the wick and are vapourised during burning and form flames

When the matchstick catches fire or is burnt, the heat released due to the burning of chemicals on the match head, partly decomposes the wood to form wood gas. The wood gas then catches fire and produces a flame. Structure of a flame In order to understand the structure of a flame, light a wax candle and watch its flame Answer. Green leaves contain moisture and as a result, the ignition temperature of green leaves is much higher than that of dry leaves. Due to this, it is difficult to burn a heap of green leaves but dry leaves catch fire easily. Answered By. toppr f) Can you bum a piece of wood by bringing it close to a lighted matchstick? Answer: No. g) Why do we use paper pieces or kerosene oil to start fire in wood or coal? Answer: Paper or Kerosene oil has low ignition temperature. So they are used to burn wood or coal which have higher ignition temperature. Activity - 4. Question 4

Can you burn a piece of wood by bringing a lighted matchstick near it? Why do you have to use paper or kerosene oil to start fire in wood or coal? Have you heard of forest fires? is covered with a blanket to extinguish fire (Fig. 6.3) The diagram below show e diagram below shows burning of an oil lamp. w the arrangement of particles at 'X' and 'Y' when the lamp is burning PIW Can you burn a piece of wood by bringing a lighted matchstick near it ? Videos > Stories > POPULAR CHAPTERS BY CLASS. class 5 The Fish Tale Across the Wall Tenths and Hundredths Parts and Whole. A fire is an oxidation, a reaction between oxygen and another element that reacts exothermically with it. In the case of most commercial matches it is phosphorus that burns with oxygen. See Tony Flury's answer below, it is excellent. And note that.. Explain how the use of CNG in automobiles has reduced pollution in our cities. Answer: Place a piece of burning wood or charcoal on an iron plate or Tawa. Cover it with a glass jar or a tumbler, or a transparent plastic jar. When we bring a lighted matchstick near the other end of the glass tube then we observe a flame. The vapourised.

A matchstick can light a tiny splinter of wood but not a big log of wood. A burning matchstick can produce sufficient heat to reach the ignition temperature of the splinter of wood therefore a matchstick can light a splinter of wood directly. 24. Why do you have to use paper or kerosene oil to start fire in wood or coa QUESTIONS:4️⃣Can you burn a piece of wood by bringing a lighted matchstick near it? Explain it.7️⃣The middle zone of the candle flame is luminous. Gi ve reason.[CHAPTER: 07; COMBUSTION][CLASS: 08]EXPLAIN THE ANSWERS! ⚠️ WARNING! ⚠️DON'T GIVE ANY ANSWER FROM G00GLE

Combustion and Flame Class 8 Important Questions and Answer

Explain. Soln: This is because wood comes from the cutting of trees and forests, which affect the environment adversely. Cutting of trees results in increase of CO 2 Content in the air, as a result, global warming takes place. Also burning of wood releases a lot of harmful gases including carbon-di-oxide, carbon-monoxide and sulphur-di-oxides. 37 When we bring a burning matchstick or gas lighter near a gas stove and turn on the knob of stove, the gas bums rapidly and produces heat and tight. This is an example of rapid combustion. Question 11. What is the principle to extinguish fire? Answer: Fire can be controlled by removing one or more of the essential requirements-air, fuel or heat What could the 'pop' sound in some cases be due to when a burning match stick is brought near the mouth of the test tubes? Answer: Yes. Non-metals generally do not react with acids, but metals react with acids and produce hydrogen gas that bums with a 'pop' sound on bringing a burning matchstick near the mouth of the test tube. Question 18 Aim: To prove that when a candle burns, it is the wax vapours that burn and not the liquid wax. Materials needed: A candle and a matchbox Method: 1. Light the candle using a match. 2. Blow out the candle and immediately bring a burning matchstick near the smoke. In case the smoke is not visible, hold the lit match above the wick

Lakhmir Singh Science Class 8 Solutions Chapter 6

First of all, your test tube better be upside down, as H2 (g) is way lighter than air & will be on the ceiling in a heartbeat. Second, by lighted splinter I assume you mean a thin stick of wood, like a kitchen match stick, which has been ignited.. Can you burn a piece of wood by bringing a lighted matchstick near it? Explain. How forest fires occur during the hottest summer days? Why do forest fires occur during hot summers? Page: 1 Files: 3. Chapter 6 - Combustion and Flame- 3

Explain. Solution 36: This is because wood comes from the felling of trees and woods, which has a negative impact on the climate. Cutting down trees causes a rise in CO 2 levels in the environment, resulting in global warming. Additionally, burning wood emits a variety of toxic gases such as carbon dioxide, carbon monoxide, and sulphur dioxide Prepare a fresh solution of sodium hydroxide in a test tube by dissolving 3-4 pellets of it in 5 mL of water. Drop a piece of aluminium foil into it. Bring a burning matchstick near the mouth of the test tube. Observe carefully. Solution: We observed that a colourless gas is evolved which burns with a pop sound Prepare a fresh solution of sodium hydroxide in a test tube by dissolving 3-4 pellets of it in 5 mL of water. Drop a piece of aluminium foil into it. Bring a burning match stick near the mouth of the test tube. Observe carefully.What does the 'pop' sound indicate? As before, the 'pop' sound indicates the presence of hydrogen gas Explain how CO 2 is able to control fires. Answer: Place a piece of burning wood or charcoal on an iron plate or Tawa. Cover it with a glass jar or a tumbler, or a transparent plastic jar. Bring a lighted matchstick near the other end of the glass tube. Question (i). Do you see a flame? If so, what is it that produces a flame? Answer

This can be done by throwing a damp blanket or spraying foam of dry carbon dioxide. ii. By Removing the inflammable material near the fire like Gas, Oil, wood, Plastic etc. iii. By lowering the temperature below Flash Point of the burning material, using water etc. Q5. Match the items in Box A with those in box B. A i. To burn paper or a piece. c) Stone piece. d) Wood. Answer:- d) Wood . Wood is combustible substance while the other does not catch fire these are non- combustible. 2) Which of the following has the highest calorific value? a) Kerosene. b) Biogas. c) LPG. d) Petrol. Answer:- c) LPG . Calorific value is the burning efficiency of the fuel

MP Board Class 8th Science Solutions Chapter 6 Combustion

  1. This lecture was later printed in book form in 1860. What faraday basically said was that when you burn a candle you see the formation of A beautiful cup. This cup is formed as the air near the candles moves upward due to the force of the current produced by heat of the candle. 1. List conditions under which combustion can take place. 2
  2. ium in freshly prepared solution of sodium hydroxide taken in a test tube. A pop sound is heard when a lighted matchstick is brought near the test tube. Write down your conclusion and the reason for the pop sound. (Hint: metal react with a base to produce hydrogen gas. Hydrogen gas burns with a pop sound.) III
  3. ium utensil? Explain. Ans. Lemon pickle cannot be stored in alu
  4. You are provided with three watch glasses containing milk, petrol and mustard oil, respectively. Suppose you bring a burning candle near these materials one by one, which material(s) will catch fire instantly and why? Answer 31. Hint: Pertrol will catch fire instantly because it is highly inflammable. Question 32. Manu was heating oil to fry.
  5. Answer. (a) The flame extinguishes because of non-availability of oxygen. Air or oxygen is necessary for combustion. Question. 7 If a person's clothes catch fire, the best way to extinguish the fire is to. (a) throw water on the clothes. (b) use fire extinguisher. (c) cover the person with a woollen blanket
  6. The calorific values of petrol and CNG are 45000 kJ/kg and 50,000 kJ/kg, respectively. If you have vehicle which can run on petrol as well as CNG, which fuel will you prefer and why? Although wood has a very high calorific value, we still discourage its use as a fuel. Explain. Forest fire produces a lot of air pollution
  7. Question. 31 You are provided with three watch glasses containing milk, petrol and mustard oil respectively. Suppose you bring a burning candle near these materials one by one, which material(s) will catch fire instantly and why? Answer. The watch glass containing petrol will catch fire instantly because its ignition temperature is very low

NCERT Solutions for Class 8 Science Chapter 6 Combustion

  1. ium in freshly prepared solution of sodium hydroxide taken in a test tube. A pop sound is heard when a lighted matchstick is brought near the test tube. Write down your conclusion and the reason for the pop sound. (Hint: metal react with a base to produce hydrogen gas. Hydrogen gas burns with a pop sound.
  2. An old poem, but a good one. Ash and Holly burn green, beech and Oak should be seasoned (I quite like birch if well dried), elm is a poor burner. That said, for bushcraft and survival, the dry wood that is to hand is best! Its often more a matter of how you burn it than what you burn. Preparing Fuel Wet fuel will not burn, but it can be prepared
  3. When the bring lighted matchstick on a lighter near the burner of a gas stove in the kitchen, the cooking gas starts burning at once producing a lot of heat and some light Chemical Reactions and Equations Class 10 Important Questions and Answers Science Chapter 1
  4. The test-tube can be held by a strip of twisted paper or wire. 59 At the close of the Ist exp. perform the one figured on page 79. A small piece of wire-gauze, 4 or 6 inches square, for this purpose can be purchased of any tinsmith. If you do not force the gas out too rapidly, you will be able to burn it on either side of the gauze at pleasure
  5. The kerosene oil has lower ignition temperature than wood. Can you tell the colour of the flame? Water vapours also surround the combustible materials helping in cutting the supply of air. 2) wood - combustible. It is an extremely Suffocating and corrosive gas. Question 1. This prevents the burning of green leaves. Answer: Question 8
  6. Where Have You Gone Alan Jackson $13.99 $ 13. 99 $17.98 $17.98 (1,479) Hardware Billy F Gibbons $12.99 $ 12. 99 $14.98 $14.98 (378) All Things Must Pass [Deluxe 3 CD] George Harrison $25.99 $ 25. 99 $29.98 $29.98. Welcome 2 America Prince $25.97 $ 25. 97 $29.98 $29.98. All I Know So Far: Setlist P!n
  7. wooden wood matchstick begins to burn at that end. The burning warm the wood that is close to the flame. When this part of the wood reaches the ignition temperature, it, too, begins to burn. In this way the flame travgives out els enough heat to along the length of the matchstick. Flame in a Cage You can keep Humphry Davy, 2

Class 8 Science NCERT Solutions for Chapter - 6 Combustion

Course: Science - Class 8 (Chapter 01-10), Topic: Chapter

Short Answer Questions (Part - 2) - Combustion and Flame

If your kindling is doing its job - burning hotly and laying a bed of coals - slightly green or damp wood will still burn. You may find that slightly (I can't stress slightly enough) green wood burns longer than wood that is completely dry, making it about ideal for keeping a fire overnight or all day long hesc106.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free C Burning a piece of wood in air. D Mixing water and oil. (b) A few drops of water fall on a spot of ink on a piece of paper. A pattern of colours is formed on the paper. This is due to the process of A distillation. B chromatography. C precipitation. D neutralisation. (c) A test tube is clamped as shown in figure 1 (a)

Lakhmir Singh And Manjit Kaur - Combustion And Flame

  1. Here's what the primitive approach would require: build a fire of dead hardwood and let the wood burn down to coals; burn out a concavity in a chunk of wood by using hot coals and a blow-tube (a hollow plant stem like Joe Pye Weed or rivercane) to superheat the coal; scrape the depression with stone and sand to produce a finished wooden bowl.
  2. By Removing the inflammable material near the fire like Gas, Oil, wood, Plastic etc; By lowering the temperature below Flash Point of the burning material, using water etc ; Question 5. Match the items in Box A with those in box B. A. To burn paper or a piece of wood; Small fire can be put out; When water is spread on fire
  3. 3. Bubble the gas through the limewater. Half-fill a test tube with limewater - then boil it. Use a delivery tube to pipe the contents of the CO 2 sample test tube directly into the boiling limewater. You can use a flexible pipe or a (metal) straw as a delivery tube, if nothing better is around

Combustion and Flame Heat CBSE Class 8 ekShiksh

Stick the foil onto the piece of balloon, near the edge of the tube. Bring a lighted matchstick at the mouth of the test tubes one by one while heating. you can find me in bread. The. Chapter 1 We are live now here at St. Dominique Square witnessing a fire incident that happened at early 8:19 this evening. The fire that started from the 27th floor of the tower was now scattered all around burning the rooms nearby. Unfortunately, water hose brought by the firemen are unable to.. DISCLAIMER. We must explain that this Free Online Bilingual Dictionary includes all of our products that you can find in our products page.You will find that it is the most complete online bilingual and bidirectional English-Spanish dictionary on the web, showing not only direct translations but synonyms, complete definitions, set phrases, idioms, proverbs, usage examples, famous quotes and. Mili and Aastha are playing a game which goes like this: starting with a large pile of matchsticks, each player takes turns to take away 1, 2 or 3 matchsticks from it. No player can pass a turn. The process continues till there are no matchsticks left and the player who takes the last matchstick(s) is the winner Victorian London - Professions and Trades - Factory Manufacture / Making of - Matches. A VISIT TO A LUCIFER SPLINT FACTORY. WHO, with the exception of our more youthful readers, does not remember the time when the tinder-box, with its flint and steel, ruled supreme in the kitchen, and many curious contrivances for obtaining a light prevailed on the mantelpiece of the dining-room or study.

Chapter-6 - Zknowledge

Enter the email address you signed up with and we'll email you a reset link You find a damp patch of sand near the base of a cliff. a piece of pine wood (density 0.4 g/cm3) floats in water, but a piece of granite (density 2.7 g/cm3) sinks. Fruit and vegetables sometimes float and sometimes sink. How can you explain this? 2 Observation: Add a teaspoon of sugar to a glass of water and stir. Question: Explain what.

The composition of one part is also the same as the composition of the other parts. But you can change the concentration of solutions. This means you can prepare different solutions of sugar in water of different concentrations (for example, 10%, 20%, or 30%). In the same way, you can prepare different solutions of salt in water Maybe if you listen to me for a minute we can work something out so you can come in - BOOK I've already got something worked out. (and) Be seeing you. (and) Be seeing you. Book hangs up the phone and the dead CLICK registers on Schaeffer Luminous objects : a piece of red hot iron, a lighted fluorescent bulb, the flame of a gas burner, a lighted torch, kerosene torch, sun, firefly. Non luminous objects : Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of. Can you understand that knowledge itself is ignorance? If knowledge were real it would have been there eternally it would not have had a beginning and an end. From a flower a fruit appears and there are seeds in the fruit. Prior to the appearance of the flower something has happened in the plant for the appearance of the flower CBSE Sample Papers for Class 12 Computer Science. Time allowed : 3 hours Maximum Marks: 70. General Instructions : There are a total of 26 questions and five sections in the question paper, All questions are compulsory. Section A contains question number 1 to 5, Very Short Answer type questions of one mark each