Combustion and Flames Full Chapter Class 8 Science | NCERT Science Class 8 Chapter 6

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✅ In this video,
✔️ Class: 8th
✔️ Subject: Science
✔️ Chapter: Combustion and Flames
✔️ Topic Name: Combustion and Flames Full Chapter Class 8 Science | NCERT Science Class 8 Chapter 6
✔️ Topics Covered in This Video: Full Chapter Explanation & Exercise from Class 8 Science Chapter 6 Combustion and Flames
=======================================================
00:00 Science Introduction: Combustion and Flames
00:06 What is combustion?
2:39 Activity to understand Combustion possible in only presents of Oxygen
4:37 Combustion
10:04 Activity for inflammable & Flammable substances
13:04 How do we control fire
17:05 Type of combustion
20:34 Structure of a flame
25:05 What is a fuel?
27:29 Burning of fuels leads to harmful products
32:01 solution question answer FAQ's
=======================================================
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Mam blacksmith use the outermost part of the flame to melt gold and silver because it is the hottest part of flame.

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The Goldsmith uses the outer part of the flame to melt Gold and Silver. Because metal need high temperature 🌡️ to melt and the outer part of the flame is the hottest as u explain mam.

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Mam it's very helpful but there is a doubt can we also use sand as a fire controler. As I see in petrol pump their are bucket which contains sand

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yessss you are right we can also use sand as fire extinguisher

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Ma'am in types of combustion there is also a slow combustion it is a form of combustion which takes place very slowly and at low temperature example- cellular respiration

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But the topic of slow combustion is not in the book of class eight ncert

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Like rusting too

[@sadhanasharma3277]

Goldsmith use - OuterMost Zone...... Good fuel - CNG, LPG..... Thanks mam for explanation

[@MagnetBrainsEducation]

Harry Dangal, Thanks for the reply. Wherever possible, please recommend us to your friends. Get All Classes & Subject Wise playlists here:- ​www.pabbly.com/out/all-videos-playlist

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Question: The ignition temperature of wood is high right? That's why it takes time to reach a particular temperature to burn.. but Ma'am said its low..

[@sanagvlogs2827]

You taught really nicely 😊. Thank you. But one thing in the activity for the structure of the flame I think the tube should be near the innermost zone because the unburnt particles are present there also they mentioned dark inner zone. 😀 Thank you for reading. 😁

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Q- which zone of a flame does a goldsmith use for melting gold and silver? A- a goldsmith uses the outer part of the candle flame for melting gold and silver

[@devilangel6495]

Outer zone (blue ) it is the hottest part of a flame this zone also called complete combution and non - luminous zone

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@@devilangel6495 Thank u

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Right

[@rasheedabegum3537]

Right

[@vishalyadav2015]

Blue zone

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Q. Which zone of flame does a goldsmith use for melting gold and silver? Answer= The goldsmith uses outermost zone of a flame which is non luminous, and used to melt gold and silver as it is the hottest zone of flame. *If I am right tell me mam*

[@aravinds7386]

Good evening ma’am.does the burning of tissue paper come under spontaneous combustion or rapid combustion

[@MagnetBrainsEducation]

Thank you for your question! Spontaneous combustion is when a material ignites without an external heat source, while rapid combustion is when a material ignites very quickly with an external heat source. Tissue paper ignites quickly, so it would be considered rapid combustion.

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For outermost region, yes i have attend all the lectures as legend

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Outer most zone is used in gold/metal/silver as it needs to converted into a liquidified material .blacksmiths use outer most zone for melting gold/silver/metal.

[@MagnetBrainsEducation]

Thank you for your comment! We're glad you found our video helpful. We're India's No.1 Online Education Platform and we offer educational videos to school students.

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Gold Smith uses outer most part of falme because it is the hottest part in flame 🔥

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21:49 gold Smith uses the outer layer part to melt gold and silver because metal needs high temperature to melt ( as u explained)

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goldsmith uses the outer most layer of the flame to melt gold

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Outermost zone and we can also say the hottest part of candle's flame is being used to melt gold and silver by goldsmith .

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Thank you so much for the kind words! We're glad you enjoyed the video and found it helpful. :)

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Hi

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Leeban

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Note : Rusting isn't a combustion reaction but oxidation reaction.

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The goldsmith use hottest part of the candle flame for melting gold and silver

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13:41 Mam water controls the flame by increasing the ignition temperature,and you told that it reduces the ignition temperature. because if it reduces the ignition temperature it means it will catch fire more quickly. It was a correction

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The answer is Because outermost zone of flame is hottest . The outermost zone gives max. Heat Because of complete combustion.

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21:51 Answer is Outter Most zone Thank you

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Mam ignition temperature the lowest temperature at which substance fire is called its ignition temperature

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37:38 LPG is the better fuel as compared to wood

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Tatti

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21:52 outermost region of flame

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The outermost part or zone ( non luminous part) of flame is used by Goldsmith for making accessories as it is the hottest part of the flame.

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the outer zone is also know as luminous zone not non luminous part 👎👎

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Luminous Non luminous Dark zone

[@Isha-zb1zc]

Wrong info...

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😢

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Yeah even , for silver

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Mam I have a doubt that what is the difference between combustion and burning. I am so confused 🤔

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The are same

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This chapter felt like so difficult but ur explanation helped me more than anything and made it easy.....😅 THANK YOU MAM......

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no

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what no

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Mam goldsmith uses outermost part part for melting silver nd gold

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Yes

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Thank you soo much ma'am .. i understood all the concepts from this chapter!!! :)

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Outer zone ( non -luminious ) and thanks for explanation mam I understood all the chapter

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Your way of teaching is impressive. Thank you so much 🤗

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Can we use sand to control fire because is can also cut the supply of oxygen

[@ishalfurqan9435]

Is it important that all combustible substance vapourise?

[@MagnetBrainsEducation]

Yes! Understanding the principles of combustion is important for many different applications, such as the efficient use of energy sources. We hope our videos have helped you to understand this concept better. Keep up the great work!

[@tashiyangzomyang4521]

This really helped me tomorrow is my exam thank you magnet brains

[@MagnetBrainsEducation]

Previous Video : Coal and Petroleum Full Chapter Class 8 Science kzbin.info/www/bejne/aYixgHqGgq6Ems0 Next Video : Conservation of Plants and Animals Full Chapter Class 8 Science kzbin.info/www/bejne/eaqbdadsfcqLf9U

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Ma'am can you answer why water is use to control fire

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M

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[@anoopsingh9746]

Mam goldsmith use the outermost blue region to melt gold and silver as it is the hottest part.

[@hansika3209]

I think she wanted to say that water makes the ignition temperature high when poured during a fire. Becz if the ignition temperature is low so it can catch fire easily.

[@MagnetBrainsEducation]

Hansika, Thanks a lot for watching the Magnet Brains videos. Please recommend us among your friends. Get All Classes & Subject Wise playlists here:- ​www.pabbly.com/out/all-videos-playlist

[@sheshikashwetangi5178]

I think she want to say that water makes the ignition temp. high when fire.

[@DXD129]

Mam what if the water put on fire is warm will it burn?

[@shivuuthegamer2410]

The goldsmith use the outermost zone of the flame as it the hottest part of the flame and metal can be moulded in required shape

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Nice explanation ma'am, thank you so much ma'am it helped me a lot. Will you launch any live classes because it will help a lot like asking doubts in the live sessions.

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Mam the hottest zone of the 🕯🕯🕯your teaching is brilliant superb

[@Akashrai-st2gz]

If we are meeting good or silver so using upper flame because those are very heat flame ☺️

[@MagnetBrainsEducation]

Hi there! We are so glad you are enjoying our educational videos. We hope that our free educational resources are helping you in your studies. Keep up the good work!

[@Flameedits990]

As an Flame my structure is Good😅❤️

[@MagnetBrainsEducation]

Thanks for taking the time to watch our videos and leave a comment! We're glad you're enjoying them and that you find them helpful. Keep up the good work and we hope you continue to learn a lot from our videos!

[@nikitasingh2169]

21:52 Gold smiths use the outermost region of the flame(complete cumbusion of the flame take place in thi region)

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Ooo

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Ya mam

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Where are you from

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Thanks didi tomorrow is my test and iam totally prepared 😀👍

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Yes tomorrow is my test

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Mee too

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Hey Darsh, We're so happy to hear that our videos have helped you become more interested in your studies! Keep up the great work and we know you'll continue to achieve amazing things! :)

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Thank you so much mem For the best teaching Stay connected with magnet brains ❤❤❤❤

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Mam sand is also used to cut off the fire

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One like for her

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It is very nice

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Very Thank You Mam 🥰 My Syllabus Is Now Completed Because Of You 👍👍 Thank You Magnet Brains😊😊 Love You 💕 From Delhi Ishant

[@MagnetBrainsEducation]

Ishant Sharma, Thanks a lot for watching the Magnet Brains videos. Please recommend us among your friends.

[@mohdayazansari3508]

I have a question that a blanket can be burn so how it reduces the supply of oxygen while burning and how it can't burn

[@user-je5sz5mw5y]

mam, more than half of my school uses magnet brains and it all spread from me and my bsf. we recommended others and they, to more ppl. u ppl are the best

[@suveentomar3066]

The goldsmith use Outermost layer

[@arjunpatel6972]

The goldsmith's use the outermost zone of the flame because it undergoes complete combustion producing a large amount of heat.

[@MagnetBrainsEducation]

Arjun Patel, Thank you for your comment. Do recommend Magnet Brains to your friends.

[@arjunpatel6972]

@@MagnetBrainsEducation I will surely recommend this to my friends.

[@IslamicSpeaker.official]

I am watching in summer holidays because I have not any holiday homework 😂😂😂🤣🤣

[@OneMinSci]

Me also but after summer holidays I have exam

[@bablikoli1890]

Good evening mam. Mam there are 4 type of combustion. Rapid combustion ,spontaneous combustion,explosion,slow combustion . And there are 4 zone of a candle 🕯️ outer zone, middle zone ,dark zone,blue zone .

[@paper4]

4:27 maam in this activity, since there is a vacuum created under the glass, so the air pressure outside the glass will break the glass?

[@anushkapandey7102]

No, the air pressure outside the glass won't usually break it. When there's a vacuum created under the glass, it means there's less air inside. The air pressure outside still pushes on the glass, but if the glass is strong enough, it can handle that pressure. However, extreme changes in pressure might cause the glass to break.

[@rashione982]

the comment section is full of questions but no replies.........then why do you care to even mention about our doubts?

[@aarnavraghav5575]

Ya

[@rashmimore2150]

Outer most zone of flame on the candle uses a goldsmith

[@girrajgarg911]

A goldsmith uses the outer zone of candle flame for melting gold and silver.

[@aryascanvas2238]

21:47 Goldsmiths uses outermost part of the flame🔥

[@MagnetBrainsEducation]

Anjana Jaiswal, Thanks a lot for watching the Magnet Brains videos. Please recommend us among your friends.