Combustion and Flame in One Shot | Chemistry - Class 8th | Umang | Physics Wallah

📝 For complete notes of Lectures, visit Umang Batch in the Batch Section of PhysicsWallah App/Website.
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▶️Complete CLASS 8TH - SCIENCE ONE SHOT Lectures - • Science - Class 8th NCERT
In this lecture of Umang batch, Sunil sir is going to teach you about Combustion and flame.
Topics covered in this lecture are-
•Combustion
•Types of Combustion
•Fire triangle
•Why candle's flame goes up?
•Zones of candle flames
•Calorific Value
and some interesting questions for practice.
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There are other topics of Science that we are going to cover in upcoming videos for Umang. Stay tuned with Physics Wallah Foundation.
🔴 Details about the batch -
• Recorded Lectures for Class 8th Students.
• PDF Notes of each Lecture will be available on the PW App.
• Weekly Lecture Planner will be uploaded on PW Foundation Community Page.
• Classes will start from 10th January and we will cover the whole syllabus by 10th March.
🎦 Eight Lectures per week will be uploaded.
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#Science #Class8 #Umang

[@heisfinicky]

Who are the backbenchers here like Edit- Wassup juniors ma to boards de rha hun 🥲

[@Krishnmayi__shiwanii___0]

Me also but I am topper of my school 🏫

[@ASHLEY_SAKI_]

​@@Krishnmayi__shiwanii___0how bro

[@mayankop64]

Me also with my gang CARDINAL 😂😂😂

[@jayyjaat8]

​@@Krishnmayi__shiwanii___0topper kaise bante h bata do ❤

[@Jaisharma_735]

Topper

[@sauravchaudhary3236]

FOR ALAKH SIR -- This man is literally born to make history

[@billionairegauravmotivatio3808]

FOR OP GAMER - THIS MAN IS LITERALLY BORN FOR SPAMMING

[@adityaaaa79]

@@billionairegauravmotivatio3808 😂😂

[@khabarpachisi3351]

Pehele padalo beta...

[@beyondtheken7419]

bhai kya hi history bnega

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no it's different physics wallah

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They are providing education better than our school teachers without any fees..... Think about this topic deeply once😮😮 We need these kind of teacher in our school also where we waste our alot of money monthly😢

[@user-ix3nj5be7p]

binod

[@rakeshtiwari5542]

👍

[@jairajputana3399]

And time also

[@shivgovind4684]

@@jairajputana3399 yea, time is priceless. Our time also waste in schools unnecessary classes of 6hours which is only fornt benchers can understand1 hour in traveling and 2-3 hours in their random homework and non sense activities🤦🤦😏

[@SangatiVariya-qj3fl]

Correct

[@user-ji4ko1iv6n]

I MUST SAY, HIS TEACHING METHOD AND EFFORTS ARE HIGHLY APPRECIABLE..!😇 😇

[@user-ji4ko1iv6n]

Really this is true

[@richasharma542]

Physics wallah : Literally with 0 haters Alakh sir is an actual legend ✨✨

[@rikama669]

BRO SUNIL SIR MADE A LOT OF EFFORTS MAKING THIS VIDEO AND TEACHING US U SHOULD APPRICIATE HIM HE IS A LEGEND BRUHH

[@donboss6728]

i am one

[@user-hv1rr7rq3l]

Bro all other institutes are haters😂

[@jagdishnarayansharma]

Bro then why are you here go to your sir😤

[@nonstop4489]

One of the best teacher of chemistry that we study. His way of teaching more enjoy and attractive that I saw

[@mohdnaim4441]

Ya

[@mohdnaim4441]

U are absolutely right

[@GamerBoy99997]

Also all teachers are also great

[@rahmatsaba7041]

This teacher is like a diamond

[@xcm-esp-2]

Yesss

[@user-bg7pj5xn8w]

❤

[@user-xt9fs7xt9p]

U r amazing sir .... 🎉 to teaching way is soo amazing I understanding the whole CH by this video thanku sir now I will use ur video for study......

[@laxmikushwaha8135]

'Khatarnak understanding ''. Epic one 😂 My brain during this whole lecture was - "aag laga di aag laga di aag laga di aag laga di"

[@xizento]

anu malik op😂😂

[@soukhilalkori6036]

All the teachers of physics wallah are explaining very well👏

[@ravendrasinghrajput5289]

😊😊😊😊😊

[@mittalpatel8358]

Sir because of you I got 78/80 in science and now I am the topper of the class in science

[@ddddrddd6288]

Pucha kisi ne ?

[@Mr_Potoo]

@@ddddrddd6288 OOOOOOOOOOOOOOOOHHHHHHHHHHHH BHAI ME NAHI SEHETA

[@SunilKumar-ze2tq]

Mere bhi✨

[@mittalpatel8358]

Teri maa ne mujhe tujko javne ko kaha tha

[@anshika.singh2014]

Me too 😁

[@coder_yashjain2215]

Thank you sir,Literally i had a tough time dealing with this chapter but after seeing your video it made this chapter feel like a piece of cake.

[@GodzexOfficial]

Haggu

[@lordkatyayan2467]

​@@GodzexOfficialsahi me

[@utkarshrai5934]

Arrival of sunil sir is directly proportional to level of excitement

[@laxmanakhare8291]

Bhaukal macha denge Sunil sir😄😄😄😄😄

[@romeojod2230]

​@@laxmanakhare8291😂

[@cricansh5171]

I always appreciate his teaching method

[@Haam9873]

Bhakkkkk

[@mittalpatel8358]

Ya

[@user-oi5rt4dv7o]

Pudina

[@dubeyxpresslogistics6188]

Sir your teaching is very entertaning and like your study method very much❤

[@TheMotivatingSaiyan]

Thank you very much Sir . This Helped me a lot.

[@user-oi5rt4dv7o]

Xxx

[@suraiyaparvin2756]

49:45 Sir I understand the capillary action

[@aryabhalla4716]

I must say , his teaching method and efforts are highly appreciable 😇

[@priyankaduggal]

True

[@romeojod2230]

No

[@adityagaikwad8593]

amazing teaching sir ❤❤ I understood everything ❤❤❤

[@folkloresupremacy13]

very good video i understood all concepts thank you physics wallah

[@Starffofficial710]

40:39 , sir, we can also extinguish fire by cement powder is not it sir 🙏

[@vinodmaharia8220]

Literally I like very much because in this video all concepts are cleared.😊 Thanks sir 😄☺️

[@SunilKumar-ze2tq]

Kaunse school me ho

[@vinodmaharia8220]

Aapse matlab 🤫

[@user-le9hb3vm3t]

Amazing lecture ❤ thank u so much sir

[@Akmalhussain-xc9pq]

Yes it was extremely good

[@kumarvansh6989]

Thank you so much sir you helped me in my internal assessment. Nice and easy explanation

[@user-ix3nj5be7p]

binod

[@originalbeauty5802]

Amazing teaching skills👍👍👍

[@user-bw4se7bo8i]

Our teacher taught us this ch in 5 periods and each period is of 40 mins but still couldn’t understand a thing😅

[@ishmeetbali1544]

Thank you sir for delivering beautiful lecture.

[@creativedrawing2411]

Sir aapne kaha ki oxygen jalti nahi jalati hai to oxygen calender jo hospital mein hota hai wo kese blast hota hai

[@amitpachauri8717]

Amazing lecture mind blowing I am listening and understanding this from class 7 sir can please tell me where is your coaching center please I want to take your live lecture face to face

[@itz__jay__0007]

In Delhi Or Kota And Varanasi Praygraj Gorakhpur

[@itz__jay__0007]

Subscribe Please

[@pratyushsuradkar3237]

This man is a bright star of pw

[@pachratanmaurya4799]

Yes you are right bro 👍🤗

[@shakeelashiekh3038]

Of course

[@dushyantsivakumar3737]

FAX

[@ultimatechiraggamer184]

Fax

[@SantoshSingh-iw4np]

Sir ne puree video mai "Bhaukaal maccha diya" 😂😂

[@rahil.113]

All doubts clear 👍🏻☘️

[@amanpandey5289]

Best type of teaching, I never seen this type of teaching. Thank you sir for teaching

[@richukumari327]

Wonder ful explanation

[@akhileshthelegendff]

I read in dps chas a best school but this type of explanation is unbelievable Sunil sir

[@kidclashytkidclashyt7166]

Koi best nhi h bro hum bhi pdh rhe dps Ranchi me

[@user-tb2tc4dq7u]

I am also study in dps rajas.

[@nidhisingh532]

agreed

[@adityabindal3219]

sir but in my book it is written a substance suddenly bursts into flames by absorbig external heat and examples is given oil rags and hays

[@rokogaming1234]

Sir, I don't know will you read my message, but you are literally multitalented and after watching this video my mind only says sunil sir ki jay ho!

[@user-ix3nj5be7p]

binod

[@Doraemonuniverse779]

yahh

[@poisonousgem1142]

har comment me binod @@user-ix3nj5be7p

[@gopalsinghrajput358]

Binod

[@tarunyoutuber774]

Congratulations bro for 3800 subscribers

[@mpvlogs4095]

Thank you Sunil sir for good explanation

[@Priya-wk9vo]

Sir. Bhaukal macha diya 🔥🔥🔥🔥💥

[@headatthespot6946]

PW to magnet brains : Swagat to Karo hamara😎😎

[@user-bb6pc2wv8e]

Sir you are great 😊

[@its_renveer]

hello sir . i wanted online classes for next year 9th grade. are there any batches available from next year?

[@hemantgupta8518]

Me too

[@sujay6983]

@@hemantgupta8518 me too

[@Artist-Multitalentedkudi468]

Sir is great padhne ka man bhi na ho to bhi man karega itna acha sir padhate h agar aise school me bhi teachers ho to me ek bhi lecture na drop karu 😍

[@samiyashaikh2823]

Literally sir you teaching is so good and important 🌼

[@ffwrudra94]

No word's for the explanation ❤

[@shreesoni9078]

Haa kyu kii eng. Ke kuchh kii words aate hamee humm jo humm likhh deyee abb or kuchh likh ne ki aukaat nahhi bacchi

[@Kugelblitz2]

​@@shreesoni9078 kehna kya chahte ho 💀

[@sakeenabi9177]

Thanks sir for giving extra knowledge for all of us 👍👍😀😎

[@Killer.yashveer]

Extra knowledge nahi hai yaar bus naam karane ke liye extra knowledge tho Olympiad book 📚 me bhi hote hai

[@fable9272]

@@Killer.yashveer no

[@meetanjalinayak8690]

Nobody can not teach like digraj sir.

[@debasmitapatra2578]

All teachers are best in their own place.

[@SiddhiVinayakMart]

Digraaj sir is also best but for sst and here Sunil sir is best😊

[@kittukittu4433]

Sodium chloride should be used to extinguish fire due to magnesium metal

[@sanjaykumarsharma8729]

Sir your bhokal macha denge dialogue is sooo good😂🎉🎉😂😂😂

[@shahidhussainkhan5796]

me too😂

[@user-ix3nj5be7p]

binod

[@user-ix3nj5be7p]

binod only binod

[@kapilsharma-ew2wh]

Sir when paper is burnt it first produce a flame but after sometime it only have a glow so can that glow be considered as smouldering?

[@rohitachoudhary4082]

Ya , because there's glow only , not a flame ( 👆🏻In my opinion)

[@NKthesoulofficial]

Example of spontaneous combustion - Na, k, Li and white phosphorus Legends are reading Nakli

[@priyankadhawan5778]

but sir natural gas and LPG are examples of ideal gas

[@bl66ys28]

Better do self study watching pw than going school 💀

[@sanjurana6219]

You will gel TC sooon

[@vandanaverma6534]

​@@sanjurana6219nice one

[@shraddhaverma190]

Superb sir jii, it helped me a lot🙏😊

[@zeb9315]

you are great, explain in very good way but I am still confuse that what is fire and what is combustion. if during chemical reaction (fuel + heat + oxygen) full cycle is called combustion and if flame comes it fire is i am right. waiting for your good response

[@_--_--_--_--_--_--_--]

All Fire are combustion but all combustion are not fire....fire is just visible combustion... It's like flame

[@puspatripathi2556]

@darkshadow 0723 is 👍

[@ranimishra309]

Yes he or she is right

[@flowers6259]

What is flame ? Can anyone plz tell

[@Disaster_444]

Flame is a region of burning gases

[@arpitagrawal6180]

Thankyou so much sir for this amazing class

[@aadvikgupta4759]

Sir when I heard ''jai siya ram'' fire started spreading in my heart🤟🤟 You teach so good🙏🙏

[@BlackkPool3869]

while watching sunil sir's videos, i truly feel like i'm watching any webseries in netflix, bon appetite for you, sir!

[@anjanasinha2861]

Bro bon appetite means food

[@Best.Penguin123]

Haan

[@HUDAMOHMMAD]

@@anjanasinha2861 lol

[@divyashukla7741]

Sir your lectures are to enjoying and informative 🙏🙏

[@ProsenjitAcharya-ly3lr]

Sir apne yea nhi bataya ki how to calculate the calorific value of the fuel and how a matchstick work😅

[@artisticyouth55]

The alok sir, ritik sir and sunil sir are the master of class 8

[@anikadevi3806]

Physics walah is best platform for expansion of knowledge

[@riyatailor2088]

Really a very great explaination sir....😊

[@baldwivedi9920]

Sir you are the most inspiring teacher I have ever studied from

[@ajeetprakashsharma2823]

❤

[@janvikumari6098]

sir I have a doubt that when we light up a matchstick little cracking sound comes so is it a explosion or or rapid combution

[@user-mc2wt3sh5j]

Explosion

[@user-jq2fg7xo7s]

Explosion

[@study..for..all..subjectan9544]

Best teacher coming for extinguished chemistry

[@manasiah1322]

Bro hii

[@manasiah1322]

Me tere dekhne ke 4 din baad dekh ra hu 😶🙂

[@minkusharma7989]

Amazing class sir

[@Technex141]

Nice experiment 😁 Thank you❤

[@Aayushi_raj]

👍

[@KhushiKushal-lj8rp]

How do we know that in which fuel substance converts into vapours ?? Please someone tell me!!

[@urwa_tul_wusqa4841]

My tears are falling and i am taking my notes trying to study.nowadays u dont need anything to feel depressed ur parents are enough

[@disharathore6574]

Vo tumhara bright future chahte hai .... unko samjho

[@syedanushah]

@@disharathore6574 u are right

[@thatoxichildeater9597]

@@disharathore6574 aisa kya future jahan tumhe mar jaane ka jee kare

[@nxxna7949]

Bhai 8th mein ro rhe ho 10th mein to ao

[@naklilulu1465]

19s people be like hamko toh depression ka matlab hi nhi bata tha

[@pyaracoco2168]

❤just loved the lecture🫶🏻

[@digantasangani1650]

Sunil sir you are best I don't see you but now I see your all video 😁😊😊😊😊

[@ATHARV_73]

11:37 heart touching part❤

[@LakshmiKumari-dn6gj]

Yes sir mil gya aapke jaisa explaination physics wallah foundation per 😁😁

[@sushilkumar-dj1lv]

Kon h

[@village_gaming-34]

Kahan hai

[@Devil_girl7]

What a explanation sir👍👌

[@Yaduvanshi00012]

❤❤❤

[@studyCafe231]

sir , you are the best ,, I bet no one can teach good like you 😘

[@IshwarPrem.]

He is king 👑 of chemistry no one can beat him in this field in his field he excel my juniors beleive in him he will make you champion 🏆 in chemistry ⚗️🧪

[@renukaunhale5805]

Best chemistry sir I have ever seen.

[@alok.kumar.121]

yes

[@SantoshKumar-vx2xs]

Sir really thanks for making this video or lecture 🙂🙂🙂🙂🙂🙂🙂🙂🙂🙂🙂🙂🙂🙂🙂🙂

[@Therockstarkidzzz]

Best style of teaching feels like I am watching something fun

[@Therockstarkidzzz]

❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

[@jayandyash6507]

11:36 JAI SIYA RAM Made me more attentive towards the video 🙏🙏🚩🚩🚩

[@annusheoran6073]

Thank you so much sir❤ really you are an amazing teacher 😊

[@realgamerz2203]

Thank u sir 🙏☺🙌❤

[@user-ow7mr3jg4n]

Sir ji I am thankful to you. So clear my all doubts in a video

[@sanjanajha2891]

Thank you so much sir ☺️🎉

[@sakshamgupta1041]

sir why cant we use carbon dioxide in every type of fire? what will it do if we uses it? usually in our houses there are carbon dioxide exhinguisher? sir pls answer my question

[@danceproductionadityaanshu6520]

Carbon dioxide gas is non inflammable. Carbon dioxide gas does not support combustion. It displaces oxygen so that oxygen cannot come in contact with fire. Thus, carbon dioxide gas stops the supply of oxygen thereby removing oxygen from the fire triangle.

[@saraswatisahu8127]

10:37 because fire needs oxygen when we spread co² this gas stops the supply of oxygen and the fire stops

[@forff6754]

tomorrow is my paper and umm i came here randomly firstly i thought I'll not understand anything but slowly i get to understand each and everything clearly and hopefully I'll get full marks in tomorrow's paper, anyways thankyousomuch sir.

[@jyotiarora2845]

SO WHAT HAPPEN

[@technicalfacts7046]

Sir that you said in q.5 the partial combustion is z it is correct, but the partial combustion is in yellow colour because you said some carbons in partial are unburn but in question picture it is in orange colour.

[@smartjaat641]

Sir very good explanation of the chapter ❤️❤️

[@SavitriTiwari-jh9vx]

Sir I can't understand anything from my school teacher 😅and i passed my whole year just like time pass😒 but now when I saw your video, i just think that I can also study, learn and understand science as because of my school teacher, I just started hating science🥲but now I will see your all videos and will complete my all syllabus till my final exams😊 and will do full efforts ✍️ to get highest marks in science🫰 in my class. Thank you so so so much sir ! 💕💕

[@user-ol1vs4os8s]

Ane itna bada kyu likha

[@saritasharma9731]

do good and get better Mark's in finalls

[@Haam9873]

It's a good teacher science No No No It's master of science teacher #sunilsir

[@user-gr5bb5nd8g]

Thank you Sunil sir❤

[@user-sx6xt5jb8k]

Thank you sirmy all doubts are cleared related to this chapter.

[@lonelykgamer]

You and Hritik Sir are the best

[@naklilulu1465]

yes

[@CATO_YT860]

"Jo Aag Bujha Rha Hai Usi Ko Bhuja Dega" Was Epic 😂

[@Kasisroy4735]

Sir.. is this correct to say burning is Smouldering... As when we burn anything it also glows..

[@rupali22133]

You are the best one ❤❤❤ you help me thank uhhh so. Much ❣️

[@user-ix3nj5be7p]

binod

[@ghanshyammeena9582]

😮

[@tanishkavyas1476]

Amazing ,mind blowing explanation !!

[@mafiadancer824official]

No, you have to say bhokal level explanation

[@gauravpathak6666]

very good explanation sir I really like your style of teaching

[@MamtaAgrawal-rn4st]

Thankyou sir for this explanation

[@user-ri6di1wq7f]

Suneel sir aap kitna acha padate hai ❤