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30:00 mam but the pen is made up of plastic and plastic is non-combustible material so how you can say that pen can burn rather it can melt at ignition temprature
Mam I am from tamil nadu and I cant't understand hindi so pls avoid speeking in hindi often cuz at times any important stuff comes u change it to hindi and I get confused so pls mam a kind request mam thank you so much mam
In rapid combustion you can even add that it happens with the help of a fuel that means you need to burn the fuel whereas in the spontaneous combustion you need not need a substance to burn it ,it will burn as soon as it is in the room temperature
It will be much better if all the explanation are taught in English, because I'm poor in Hindi language. I hope you will look into this matter. Thank you
even i asked the same question to my teacher . she told that the oxygen form in water is uncumbustable, oxygen should only be in gas form. the constituent elements of a compound differ from the element itself. here water - H2+O=H20 H- EXPLOSIVE GAS O- CUMBUSTION BUT water extinguishes fire. SOOO... you get it. not the best explaination, becuase even i am in 6th
short answer- no long answer- when hydrogen gets mixed with oxygen the result is oxygen hydrogen is flamable but oxygen is not yes oxygen is a fuel and supports combustion ozugen cant be burnt if you are confused : a candle will burn only if there is oxygen but the candle wont burn the whole oxygen constitute in the air that will put the whole world on fire. so where were we? yes, hydrogen combines with oxygen the result is water, when the atoms of hydrogen and oxygen get linked they make a molecule with completely diffrent properties You can't burn pure water, which is why we use it to put out fires instead of starting them but you can burn hydrogen
Mam please make separate videos...i am in 8th and i just wanted the 8th class chapter but i had to see the whole video that i had learnt in class 7th...so mam its a humble request to make separate videos
in complete combustion - the fuel or substances which burns completely in incomplete combustion - the fuel or substance which burns incompletely if u find any mistake then sorry as I m a student also .... [in English also]
Complete Combution - occurs when there is plenty of supporter of combution or O2, it burns Completely producing CO2, heat and light and leaving on residue behind. Incomplete Combution - occurs when there isn't sufficient O2, it gives out smoke,soot etc and CO.
Thanks..Understood the chapter nicely...but didnt find the topic of fuel efficiency and burning of fuel leads to harmful products...but loved the class...
MA'AM in the last part in which u told about the outer zone regarding that i have a question that is outer zone the hottest zone I am having test tomorrow pls tell ma'am
![Combustion And Flame [CBSE Class 8 Chemistry Chapter 6 & Menti] Boomerang Revision - Nabamita Ma'am](http://i.ytimg.com/vi/Cw3FJoZN8O4/mqdefault.jpg)
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🟡Avail all Exciting Vedantu Pro Courses here!
✅Click here for Class 6 CBSE :👉vdnt.in/y3EG2
✅Click here for Class 7 CBSE :👉vdnt.in/y3EFy
✅Click here for Class 8 CBSE :👉vdnt.in/y3EF5
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I have asked a question of science combustion and flame activity column answer
Tatti
300 unliker
Mam then ignition temperature means jo bahot heat mei jalta hai
Am I right
If i m wrong then tell me
Tatti
26:48 class 8 ch 6 combustion and flame explanation starts
very nice explanation ma'am
thanks a lot
Tysm!
Thanks mait
@@abidmuzammil5016 tyyy
thanks very much
Helped me a lot😂🤘🏻
26:51 is Combustion and flames class 8
Looking for this comment 🧐
Thank you 😭
Thanks so much
Thx bro
THANKS :)...
For class 8 Combustion & Flame Starts in 26:50
Thanks bro 😊😊
Bhai tu toh Vedantu ka pura fan hai yaar
Har video m humara time bachata hai thank you so much
Mam really understood everything...
Thanks🥰
mam the way of your taking is amazing
26:48
Class 8 Chapter-6 combustion and flame explanation starts
very nice explanation ma'am
thanks a lot.............
u copied from srishti chauhan
@@prakharraj155 :)
Class 8 students click here 👇👇
26:51
To read combustion and heat.
Thanks me later
Thanks Bhai...thanks a lot
Bhai if you don't mind I have question why are you looking so serious in your dp
THANK YOU BRO
Thanks bhai
Ok
Ma'am in convection process
(Sea breeze) does the warm air captures the cold air place? 22:10
@Nabamita Bhattacharjee mam when u are getting next live class on RUclips for class 8th class
Thank you so much ma'am
Great explanation 👌👍
And very helpful !!
mam how to find ignition temp. of a substance ??
Sweet boy 🍬🍫🍪🍦🍨🍧🥧🍬🍨🥧🥟🍱🍚🍧🥟🍕
Yes mam
Mam the way of your talking is amazing
Thank you Mam.this was an excellent explaination 💜
First time seeing an army here💜💜💜
Yesss 😂
💜💜💜💜
Yes 💜💜💜 purple you 💜
Hey !!! Who is your favourite?
30:00 mam but the pen is made up of plastic and plastic is non-combustible material so how you can say that pen can burn rather it can melt at ignition temprature
No it just a example
29:20 mam how is fire formed when we strike two stones together. There is no fuel in there..... pls confirm !! :-)
There is a spark and fuel is the dry grass
Rubbing those two stones produces spark and when it is near the dry grass as there is less moisture it catches fire
Because of friction...
Mam I am from tamil nadu and I cant't understand hindi so pls avoid speeking in hindi often cuz at times any important stuff comes u change it to hindi and I get confused so pls mam a kind request mam thank you so much mam
26:48 class 8 combustion chapter starts
thank ful to you to help others 😂😂😂😂😂😂
thank you for giving answers for my doubts
In rapid combustion you can even add that it happens with the help of a fuel that means you need to burn the fuel whereas in the spontaneous combustion you need not need a substance to burn it ,it will burn as soon as it is in the room temperature
The Ignition temperature of petrol is 280 Degree Celsius
No
can we use wood or petrol as a fuel for flame
yes
Yes
yes we can
No we cant...we can only use mobile phones and ipads to burn fire
@@pxrth1v What A joke :)
26:51 is for class 8
I saved your time 😀😊😊😊
Thank me later 😂,
🤦
Thanks
Thanks Man You saved my time 😁😁😘😘
You are not the only who tell us that class 8th chapter starts on 26 : 51
U examplaided ignition temp very deep n nice
Hi
Thanks miss for teaching us so nicely that l can understand quickly ,,😃😃
Realy
Mam your teaching way and the way you make us understand is amazing thank yu for helping us
26:51 the chapter combustion and flame starts for class 8
Thanks
Thnks
Thnks
Thanks
Ma'am you teach very nicely , I love your teaching and I understand everything 🤗🥰👋💫
26:58
Combustion and flame starts
Thanx bro
Thanks
apne acid rain and calorific value vala topic nhi krvaya for class 8 it is also in this ch
Thank you mam it helps me to get good marks in exams
Amazing
Wowwww ma,am u can understand very nicely....thank you so much ❤️😍😘 ma,am
Mam please can you make classes on reasoning also please mam
22:03 style of saying ok 😅😅😅😂😂😂🤣
Okay?🤓🤓😂😂😂😅😅😅
🤣🤣🤣
🤣🤣
Thanks so much for your help
Mam I installed the vendatu but I do not show any videos of class 8 please tell what I do to show the videos class 8
Subscribe and see there.
It will be much better if all the explanation are taught in English, because I'm poor in Hindi language. I hope you will look into this matter.
Thank you
Petrol ignition temperature is 280 Celsius
40:29 we can pause and take screenshot
Ma'am, I want to ask that do we use fuel while lighting up a matchstick... Because according to me we just need heat and 02
Doesn’t matchsticks have a type of chemical present in the red part
33:40 but water also has oxygen in it.....will it not help the fire...pls answer me mam
even i asked the same question to my teacher . she told that the oxygen form in water is uncumbustable, oxygen should only be in gas form. the constituent elements of a compound differ from the element itself.
here water - H2+O=H20
H- EXPLOSIVE GAS
O- CUMBUSTION
BUT water extinguishes fire.
SOOO... you get it.
not the best explaination, becuase even i am in 6th
short answer- no
long answer- when hydrogen gets mixed with oxygen the result is oxygen
hydrogen is flamable but oxygen is not
yes oxygen is a fuel and supports combustion ozugen cant be burnt
if you are confused :
a candle will burn only if there is oxygen but the candle wont burn the whole oxygen constitute in the air that will put the whole world on fire.
so where were we? yes, hydrogen combines with oxygen the result is water, when the atoms of hydrogen and oxygen get linked they make a molecule with completely diffrent properties You can't burn pure water, which is why we use it to put out fires instead of starting them
but you can burn hydrogen
@Utkrisht Gandhi sorry it was an error but before replying read further bruh
Mam your teaching is very nice 😊!!
I love your teaching 🤗😁
Thanks mam it helps me a lot in this pandemic...😊😊👍👍
41:00 I literally laughed on your expression while raste pe aa jayenge
Thanks maaaaaam ❤️❤️❤️❤️
Hii mam I am ritik yelne
you are the great teacher
Mam please make separate videos...i am in 8th and i just wanted the 8th class chapter but i had to see the whole video that i had learnt in class 7th...so mam its a humble request to make separate videos
Me too
Can't you take it forward !?🧐
Take it directly on 26th minute
you can forward it by double tap but don't scold
Amazing mam can you explain reaching tha age of adolescence. Plz plz plz
Taken into consideration. Will do it.
@@VedantuJunior mam sir ne padhaya h vochapter ap padhaiye plz
Namibia man you are my favourite
Mam you are very good teacher thanks for teaching mam ✍✍✍✍✍
Ma'am what is different btw the incomplete or complete combustion you didn't explain this
in complete combustion - the fuel or substances which burns completely in incomplete combustion - the fuel or substance which burns incompletely if u find any mistake then sorry as I m a student also .... [in English also]
in complete combustion the flame is in blue colour and incomplete combustion the flame is yellow any mistake so sorry
Complete Combution - occurs when there is plenty of supporter of combution or O2, it burns Completely producing CO2, heat and light and leaving on residue behind.
Incomplete Combution - occurs when there isn't sufficient O2, it gives out smoke,soot etc and CO.
One of the best teacher👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫
mam awesome
Your concepts are clear ( love 😍 you)
*Thank you so much mam for lockdown time*
Yess
My favorite😍😍 nabadita mam
Mam please make 8 chapter- structure and functions
Yes mam please
Yes ma'am please 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
@@anushkasahni07 paisa....ye paisa....paisa ke liye .....dude
👍👍👍👏👏👏👏😘😘
Very nice explanation
Thank you mam and your smile is so cute
Teacher pe bi🤦
@@lipishree3634 😂😂😁aisa mat bolo
Mam you are my favorite 😚 and your explanation was sooo good thank you so much mam
Ma'am I just liked ur all sessions 🙈 You teach really awesome 😊😊🍒
Plz make a Quiz on all chapters of class 7 science 🎀😊
Thanks mam.... I have deeply understood this chapter
thNKU beta but its understood
@@everyxtims Btw it's thanks not thnku
Maam in combustion and flame chapter we even require fule and ignition temperature (definition of combustion)
Hii
Oririkforur4 kigirldheopejdk2kwowksgeoamwiwbw9entogkwhwowmwiebrodjeonewoeioekwiwveiwmwo4vr9emowveorje9wnefw9wne9je9ebe9rjroejejejjrjrhrhhhhhhhhjekwownsudnd9sk19wkehe9ej8sks8sne8ebdirveonaozmzlajehfsmowjeodvfoeueiwbwidh8dksiwge9wjw9109193gr8e992t3osmidk😀😫😀😫😀🔊🔊✌😋✌😎😀😋🇮🇳🤩🇮🇳😭🇮🇳😘😀🤩😀😫✌😎🤐😋🔊🔊😀🤛😫😍😫🤛😀🔊👓🤛😍👓👓👓👓👓😋🏎👓🤐😎😅🤛😅😫🏎😉😅😉😑😆😎🤗😙😝😌😤😓🤤🤤😓😝😒😲😌🤤😠😱🤫😱🤢😇
Hjk
@@nilaydonda1983 lol
Thank u mam u make our study easy
All the best
@@VedantuJunior thanks mam 🤗🤗
Wowwww
26:58 combustion and flame
thanks
I also thanks to you🙏🙏
Yes 😍😍😍😍😍😍😍😍😍😍😍😍😍
ma'am what is calorific value of flame? If anybody knows please replay.....
Hi
Calorific value of a fuel is the heat liberated when one gram of fuel burns completely in oxygen
SI unit is joule per kilograms
Okay👍
@@ArtiSingh-os9yi okay, thank you a lot.
Mam can you please make video on conservation plants and animals
Mam what does inflammable substances mean ??
Inflaming substances mean which can not produce flame after burn because they burnt completely and no particle vapourise after burnt.
@@VShiksha21 ap ka bhi koi learning change hai kya
You are the best teacher 😇😇😇
Unbelievable way of teaching
Correct vedantu and nabamita mam is very great
29:33 yes mam aag ko bhi kuchh khaney ke liye chahiye 😂😂😂
Mam your teaching is amazing
How to download the pdf of this session
Yes mam you tech very well
Mam u should also speak in hindi for some of students it will be helpful for us and others to catch the term easily
Nakli ajj bhi
😷😷😷
Thanks..Understood the chapter nicely...but didnt find the topic of fuel efficiency and burning of fuel leads to harmful products...but loved the class...
No ma'am laboratory thermometer is generally used to to measure the outside temperature not a liquid thing😊😊
You are incorrect lab thermometer is used for lab in outside it use only maximum -minimum thermometer is uesd only
😂😂
@@remyabinu2164 mai bhi ye hi bata rahi hu
Your teaching style is superb
But mam when we mix , hot water into cold water then hot water turn to normal temperature why this happens?
Because the Temperature from the hot object gets transferred to the cold object
Thank you so much ma'am 💐☺️🤩😃
Maam what is the ignition temperature of a human being? Is it based on the Type of skin?
@@Noniess9010 what is the ignition temperature of a human being
Thankyou .am
MA'AM in the last part in which u told about the outer zone regarding that i have a question that is outer zone the hottest zone
I am having test tomorrow pls tell ma'am
Mam I listen a quiz competition but when was quiz competition I am also participate please
Mam I listen a quiz competition so I am also participate this competition
41:02 LOG SADAK PE AA GAYE XDXDXD
Nice explanation 😀
My all doubts are clear Ma'am ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
Thank you Ma'am 💞💖👍🏻👍🏻👍🏻👍🏻👍🏻
Mam how sun burn without oxygen
mam apne ye hi explaination 7 m bhi di thi naa mujhe yeh example bhut pasand h
Explosion has more intensity also
Mam what is potacium liquid
Mam is there any change of molecule in convectio and radiation
Hi
Where is pdf
mam can we use sand in fire in electrical equipment??
No.
Why
@@VedantuJunior why what when how
@@ezytechs4270 😂
@@VedantuJunior ma'am I am sorry but sand can cut the oxygen and so sand can be used
Please give me the link from where I can get notes
Mam mujhe description me PDF nhi mila
Please mam pdf dedo
then in what category will we put the objects which is on room temperature
noice well explained