Physical and Chemical Changes

[@ManochaAcademy]

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[@Nagaraju-lz9rq]

Thanks

[@chandrakumar6773]

Thank u fuc*er

[@aashramigupta393]

Q 1 a - physical change b- chemical change c- chemical change d- physical change Q 2 Ans cooking of food is a chemical change because it involves the variation in the chemical composition of the material while cooking or the final inference comes out after cooking Q 3 Ans a - in a chemical change new substance is formed while in a physical change no new substance is formed b - a chemical change is irreversible whereas a physical change is reversible c - difference in mass ( chemical change ) no difference in mass of object ( physical change )

[@ManochaAcademy]

Excellent! All your answers are correct :) Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/chemistry/matter-in-our-surroundings/l/physical-and-chemical-changes

[@parulmishra5061]

Sir plzz explain in and use hindi words

[@aashramigupta393]

Thanks a lot sir

[@ishitapandey6821]

1 a) Physical change b) chemical change c) chemical change d) physical change 2 cooking of food is a chemical change because new substances are formed when food is cooked. Also it is an irreversible change. 3 during physical changes no new substance is formed whereas during chemical changes new substances with entirely new properties are formed. Physical changes are reversible whereas chemical changes are irreversible. There is usually no change of mass during a physical change whereas in a chemical changes there is generally a change in mass

[@gforcebhai1994]

False bro , some things are wrong ,

[@Rammohanrao-kb5bb]

​@@gforcebhai1994Yes,cooking of food is physical and chemical change but in different ways

[@Gamervaibhav341]

Hii I am your new subscriber! Now The Answers of your questions are -: Q. 1 - a) boiling of water - physical change b) rusting of iron - chemical change c) respiration - chemical change. d) cutting of wood - physical change Q. 2 cooking of food is a chemical change because the raw food turns into ripen food and a new substance is formed and it does not go to it's ripen food state. Q. 3 physical change - 1. No new substances are formed. 2. Energy change small 3. Mass of substance remains same. 2. Chemical change - 1.New substances are formed. 2. Energy change large 3. Mass of substance changes. So here are my answers. Thanks. 😊

[@sunilkumar-ms8zl]

2:32 lemonmade tutorial

[@shivansh.s-pb3bu]

Q1. 
a.physical change
b.chemical change
c.chemical change
d.physical change 

 Q2. The cooking of food is a chemical change as the cooked food is irreversible and new substances are formed.

Q3.
 Physical change. | Chemical change
 1. It is reversible. | 1. Its irreversible
 2. No new substances are formed. | 2. New substances are formed
 3. Its mass/weight doesn’t change | 3. Its mass/weight changes

[@ramlukoli417]

Sir Q1 answer is i) boiling of water to form steam is a physical change. passing of electric current, through water and the water breaking down into hydrogen and oxygen gases is a chemical change. ii) The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. Rusting would only be a physical change if iron molecules remained pure iron throughout the process. iii) it is a chemical change because it is taking in oxygen and utilizing it to release energy as energy is released so it is a chemical change. whereas breathing is a physical change as it is just taking in oxygen. iv) Cutting of trees is a chemical change since all chemical reactions stop and we cannot get back the original tree from the wooden peacesMelting of butter in a pan is a physical change since there is no change in the chemical composition of butter, only the physical state changes from solid to liquid. Q2answer Cooking of food is a chemical process since it involves changes in the chemical composition of food. Heating food at high temperature and adding additives such as oil, butter, baking powder etc results in the breaking down of chemical substances present in food and formation of new chemical substances. Q3answer Sl. No. Differentiating Property Physical Change Chemical Change 1 Explanation In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. 2 Example Some example of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc. 3 Reversibility Physical change is easily reversible i.e original substance can be recovered. Chemical change is irreversible i.e. original substance cannot be recovered.

[@rasanyagummerla3270]

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[@sunainakunari4678]

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[@afrinaslam3139]

1.a)Physical change b)Chemical change c)Chemical change d)Physical change 2.Cooking of Food is Chemical change because the energy increases,mass changes,new substance is formed and it is irreversible. 3.Physical Change- Chemical Change- i) No new substance is formed i)New substance is formed ii)Reversible ii)Irreversible iii)Temporary change iii)Permanent change ;Thank you for the useful video

[@ManochaAcademy]

Excellent!! All your answers are correct :) Great to hear that you found the video useful!

[@archanamishra9024]

Q1.a)Physical Change b)Chemical Change c)Chemical Change d)Physical Change Q2.Cooking of food is a 'Chemical Change' because, the process cannot be reversed as well as a new substance is formed by combing all the components. Q3.3 differences between Chemical changes and Physical Changes are:- i)Chemical changes cannot be reversed whereas, Physical changes are generally reversible. ii)Chemical changes always result in the formation of a new substance whereas, Physical changes do not result in the formation of new substances. iii)In Chemical changes, the mass of the substance generally changes but in Physical changes, the mass of the substance remains constant.

[@bhoomikabhavana8435]

1)*Chemical change- rusting of iron, respiration *Physical change- boiling of water, cutting of wood 2)cooking of food is chemical change because after cooking the raw ingredients or vegetables cannot be regained again. 3) *chemical change- 1)new substance are formed ,irreversible 2)mass of substance changes 3) energy changes large *Physical change-1) no new substances are formed and reversible 2)mass of substance remains same 3) energy changes small

[@arathyo.r3147]

is it correct it is also my doubt....

[@bhoomikabhavana8435]

It's right answer

[@Godswill-qm5jf]

Physical change 1.Boiling of water 2. Cutting of wood. Chemical changes 1. Respiration. 2.rusting of iron. Q2.cooking of food is a chemical change because a new is formed and it is irreversible. Q3. Physical changes 1.it is easily reversible. 2. No new substance is formed. 3. The mass remains the same i.e there is no changes in the mass of such substance that under goes the physical change. Chemical changes. 1. New substance is entirely formed . 2.it is irreversible. 3. There is changes in mass of the substance that undergoes the chemical changes.

[@kausarhussain2561]

Q1 a and d are the physical changes and the rest are the chemical changes Q2 cooking of food in a chemical changes because when the food is cooked it cannot be changed back into its orignal state theta why it is a chemical changes Q3 Physical changes 1 they are reversible 2 They are temporary 3 and there is no new substance is form Chemical change is reverse than the physical changes

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[@ManochaAcademy]

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My sir is a moron ,who doesn't know how to teach!

[@devshriashtikar]

1.a)Physical Change b)Chemical Change c)Chemical Change d)Irreeversible Physical Change 2. Yes, Cooking of food is a chemical change as a new substance is formed and the proccess cannot be reversed. 3.Chemical Change •Irreversible •New substance is formed •Mass Changes (without gases counted) Physical Change •Usually Reversible •No new Substances are formed •Mass doesn't change Thank you for well explained video!

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[@ManochaAcademy]

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[@arushisureliya4268]

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[@UKxPrince]

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[@pvg2050]

I have a ques - How can we separate lemon and water as you said it is a physical change ??.. Thanks

[@eberybhadisaynoooo5604]

He have not asked about lemon and water it's about sugar and water in which chemical properties are they same so hopes this helps you

[@pvg2050]

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[@ManochaAcademy]

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[@simplesci-phy4119]

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[@ManochaAcademy]

Glad you think so!

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[@cktzy3652]

Q1: A.) Physical Change B.) Chemical Change C.) Chemical Change D.) Physical Change Q2: Cooking of foods is a chemical change because after cooking there is a new substance formed, and it is irreversible. Q3: In chemical change there is/are new substance formed, it's irreversible, and the mass of a substance change. While in physical change there is no new substance formed, it's reversible, and the mass of a substance remains the same. JHENNICA JOY C. GARCIA 8-K

[@saraswathygopal9195]

q1 a physical change because we can bring it back to room temparature by cooling it so its reversible and no new substance is formed b chemical change because rusting of iron is an irreversible change and a new substance 'rust" is formed c respiration is a chemical change. Oxygen is taken during the respiration,the output should be also the oxygen in order to make it a physical change. ... That's why it is considered as a chemical reaction where the initial compound is oxygen and final compound is carbon dioxide. dCutting of wood is a physical change because only physical property of wood is changed and no new substance is formed. the properties of wood remains the same. Q2 Cooking of food is a chemical process since it involves changes in the chemical composition of food. Heating food at high temperature and adding additives such as oil, butter, baking powder etc results in the breaking down of chemical substances present in food and formation of new chemical substances. Q3physical changes are reversible and no new substance is formed while chemical changes are irreversible and new substance is formed physical changes are temporary while chemical changes are permanant the mass of a substance which is reversible[physical changes] usually remains same mass of substance which is irreversible [chemical changes] usually changes THANKS A LOT FOR HELPING ME LEARN VERY EASILY

[@aryamansahay6941]

ANSWER 1: a)PHYSICAL b)CHEMICAL c)CHEMICAL d)PHYSICAL ANSWER 2: CHEMICAL CHANGE BECAUSE NEW SUBSTANCE IS FORMED AND IS IRREVERSIBLE. ANSWER 3: PHYSICAL: NO NEW SUBSTANCE IS FORMED, REVERSIBLE, MASS OF SUBSTANCE DOESN'T CHANGE CHEMICAL: NEW SUBSTANCE IS FORMED, IRREVERSIBLE, MASS OF SUBSTANCE CHANGES

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[@ManochaAcademy]

You are welcome

[@abhulu0718]

aryaman sahay thanks 😊 for the answers

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[@Devilgaming-xd5zu]

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[@aparnanandakumar6559]

Seeing after 6 years😎😎

[@mahendrashah9583]

Q1 a- Physical change b- Chemical change c- Chemical change d- Chemical change Q2 Chemical change as a new substance is formed. Q3 PHYSICAL CHANGE No change of mass No new substance is formed It can be reversed CHEMICAL CHANGE Change of mass occurs New substance is formed It can't be reversed

[@ManochaAcademy]

Very good!! All your answers are correct except Q1 (d) will be physical change. Since when a log of wood is cut, it is broken into smaller pieces. No new substance is formed. Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/chemistry/matter-in-our-surroundings/l/physical-and-chemical-changes

[@1youchannel]

Both takes place

[@bernadettejohnson3155]

very clear and enjoyable

[@ManochaAcademy]

Glad you liked it

[@aleaderplayer-aup7740]

Q1 Boiling of water and cutting of wood are physical changes. Rusting of iron and respiration are chemical changes. Q2 Cooking of food is a chemical change because it forms new substances and you cannot reverse the food. Q3 1.Physical changes form no new substances but a chemical change forms new substances. 2.Chemical changes are permanent but a physical change is temporary. 3. Chemical changes involve heat, light and electrical energy but physical changes do not

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[@ManochaAcademy]

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[@funnyhuman2332]

Because of this I perfect my exam

[@ManochaAcademy]

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Me too

[@GauravKumar-pb4ct]

when class is you teach

[@tm.rajendra6547]

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[@mrsmrroutfamily964]

1:14

[@Ayush.1209]

Yes 1:37

[@DhahamThennakoon-1234]

Yes 9:25

[@mohanrao2008]

Yes

[@namanbelwalsreviews2581]

Q. 1. (a)Physical as nothing new is formed. (b)Chemical as the chemical properties are changed (c)Chemical as by respiration we break the food by oxygen and form glucose , carbon dioxide and water with ATP molecules so something new is formed that's why it is a chemical process. (d)As only the physical properties of it are changed (i.e. Shape here ) Q. 2. Cooking is a chemical process as something new is formed in this process. Q. 3. 1.Physical changes are usually irreversible and chemical changes are always reversible. 2.New substances are formed in a chemical change and no new substances are formed in a physical change. 3. In a Chemical change more energy is released than a physical change .

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[@KrishnaKumarChelliah]

1.a) Physical change 1.b) Chemical change 1.c) Chemical change 1.d) Physical change 2. Chemical change. Because heat is being absorbed and produces a new component. 3. Physical change - mostly reversible, does not produce a new substance and temporary. Chemical change - irreversible, produces a new substance and permanent.

[@maurisiakasike5232]

Thank you so much!

[@priyabhoir7199]

Sir you explain so nicely. 😀😀

[@ManochaAcademy]

Thanks a lot 😊

[@LeafyChan-Gacha]

Q1: A: physical B: Chemical C:physical d:physical Q2: Yes because you cant undo it. If you bake a pie , the pie/pizza/doughnut will always be cooked, you cant undo it. Q3: A chemical change can not be undone, a physical changes mass stays the same and , in a physical change the outside/shape/form can be different but the inside says the same

[@almondmilk1298]

I know this is very unrelated but i love your channel

[@LeafyChan-Gacha]

@@almondmilk1298 thank you! :)

[@ShreelovesYou-24]

But sir ,there are reversible chemical reactions,so can we say that chemicals changes are reversible and irreversible??

[@abinashgogoi11]

You are good sir Because you teach like funny that why we love to see your video

[@ManochaAcademy]

Keep watching

[@s.singingstudio325]

Please explain the chapter water.

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[@imgfinancialliteracy7585]

Sorry

[@arnavgupta9266]

Q1. a,physical change b,chemical change c, chemical change d,physical change Q2. It is a chemical change because new substance is formed. Q3. 1.Physical changes are reversible. 1.Chemical changes are irreversible. 2.No new substance form in Physical changes. 2.new substance form in chemical changes 3.there is no change in mass during physical change. 3.there is change in mass during chemical change

[@jigishajain2951]

Sir is cooking a food a chemical or a physical change? RAS

[@histo-geoalt]

Chemical

[@fionagoes4633]

I love your videos and yours only because I understand better with you only

[@ManochaAcademy]

So glad to know. Keep watching and do share with your friends.

[@karmayayshang_m7790]

Thank you sir helped a lot best teacher of the universe🥀

[@ManochaAcademy]

It's my pleasure

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Yeah

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Never ever seen this type of teaching excellent👍👍.

[@ManochaAcademy]

Glad to hear that

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Perfect teaching sir

[@ManochaAcademy]

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[@selvikarthik7922]

Sir, Super Explanation Thank you Sir.

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It helped me a lot Video thanks🤘😊😊

[@ManochaAcademy]

Great to hear that the video was helpful! Do check out more videos at www.manochaacademy.com

[@yasminapetrevski1140]

I love this video so much.

[@ManochaAcademy]

Great !

[@neerajmathur156]

1. boiling of water is a physical change rusting of iron is a chemical change respiration is a chemical change cutting of wood is a physical change 2. Yes, because the mixing of ingredients form new substances. 3. physical change does not form any new substances, change in the state of matter, mass of the substance does not change chemical change does form new substances, reacts, mass of the substance usually changes

[@sanjeetsinha7115]

Thank you sir for easy and convenient explanation of physical change and chemical change

[@ManochaAcademy]

You're most welcome

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Yes sir very much , Thankfull to you 🌹🌹

[@sayantika272]

I like your channel than other channels. You teach very good and do not teach very fast or very slow. I hope that you will make more videos. All the best for future and keep making such videos. Thank you

[@ManochaAcademy]

Thank you, I will

[@aartikashyap8371]

@@ManochaAcademy thanku you sir you are sooooo amazing outstanding teaching style

[@balajisorapalli4518]

Q1 a) physical change b)chemical change c)chemical change d) physical change Q2 Cooking of food is a chemical change because new substances are formed. Q3 physical changes: No new substances are formed Are reversible Mass doesnt change Chemical changes : just the opposite

[@aliiqbal5311]

Thank you sir for helping me I currently have a upcoming paper during this quarintine so basically you have became my substitute teacher.

[@ManochaAcademy]

It's my pleasure

[@markmina2047]

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[@ManochaAcademy]

Thanks

[@selvikarthik7922]

Q no.1) Option-D Q no.2) Chemical change Q no.3) Freezing of water, melting of wax, boiling of water, etc...

[@sanjaygulve9716]

1 is both physical and chemical

[@snehalsajeevpadikkal9044]

Your video is amazing it helps me a lot thank you sir

[@ManochaAcademy]

Glad to hear that keep watching

[@MarilouAlontaga]

Q1: (A) because he is still liquid but heated so physical and chemical changes Q2: it's chemical change because if you cook it, it produce gas and its state Q3: Physical change:the weight of substance doesn't change, temporarily change which can reverse,No new substance is formed. Chemical change: changing color,produce bubbles, irreversible. This is my answer thank you for teaching us

[@94hoi]

Question 1: a) Physical change b) Chemical change c) Chemical change d) Physical change Question 2: Cooking of food is a chemical change as it involves new substances being formed(cooked products, gases), energy (heat) being needed and it is an irreversible change. Question 3: Physical | Chemical It is a reversible It is a irreversible change. change. New substances New substances are not formed. are formed No energy is being Energy is being released or released or absorbed absorbed

[@kushagradwivedi0001]

Sir your way of explanation is amazing.

[@ManochaAcademy]

Thanks a ton

[@AAa-zm8jz]

I wish I could be your daughter so I can learn more from you or so intelligent like you......I understood better than my school teachers thankyou so much sir

[@ManochaAcademy]

Most welcome

[@avacadoanime]

not compulasarily all of the physical changes are reversible. how will u reverse cutting the lemon?

[@avacadoanime]

@@muchado961 no no But reversible means totally back. Lemon shld be back to normal. Got it now??

[@avacadoanime]

@@muchado961 hehe but you were a bit wrong. no offense or snything k>

[@avacadoanime]

@@muchado961 I know what physical and chemical changes are. I've graduated already and am in science field. Putting a lemon back together doesn't make it back. Of course it is physical change, since the material is same, no new components have been formed. But it's irreversible. That's what I mean to say

[@muchado961]

@@avacadoanime good. I’m glad you understand. I’m in chemistry myself and mistook your question to be that of a confused middle school student. Good luck in your science endeavors.

[@avacadoanime]

Tysm!

[@yirehban490]

Question 1: A.)Physical Change B.)Chemical Change C.)Chemical Change D.)Physical Change Question 2: Cooking food is a chemical change because of the mass changes, irreversible, and energy increases, and a new substance is formed. Question 3: In a physical change, no new substance is formed, is reversible, and the energy decreases. In a chemical change, a new substance is created. What you have made is irreversible, and the energy increases. Please get back to me sir. I am learning about this in class right now. Thank you P.S. I honestly don't know if I can survive Math class and Science class without you. Thank you once again.

[@ManochaAcademy]

Excellent!! All your answers are correct :) Happy to hear that you liked the video!

[@vaibhavsingh8361]

Boiling water - Physical change Rusting - Chemical change Respiration -Chemical Cutting of Wood- physical Thank you so much Sir for this wonderful lecture

[@aswasara614]

Excellent performance

[@ManochaAcademy]

Thanks

[@divyanshi7668]

Q1 A) physical change B) chemical change C) chemical change D) physical change Q2 Cooking of food is a chemical change Because new substance is formed And is irreversible Q3 Physical change No new substance is formed It is reversible It is temporary Chemical change New substance is formed It is irreversible It is permanent. Thank you sir it had help me a lot to learn

[@khushipandey8296]

A:-1.a) Physical change b) Chemical change c) Chemical change d) Physical change A:-2. Cooking of food is a chemical change because it is a new substance that is formed and it is also irreversible. A:-3. Chemical change - I) new substance is formed II) irreversible III) Mass will change. Physical change - I) no new substance is formed II) reverseble III) Mass will not change.

[@ranjanasingh9427]

Boiling of water- physical change ,rusting of iron- chemical change ,respiration - chemical change, cutting of wood- physical change

[@Cinematicz16]

Nerd

[@SriRam.bhaktisong]

Thank you so much sir 🙏🙏🙏 Your teaching process by practically method is so amazing..❤️❤️❤️

[@ManochaAcademy]

Thanks and welcome

[@ETM_FX7]

1.a)physical change b)chemical change c)chemical change d)physical change 2.chemical change b/c in chemical change formed a new substance e.g:-when we cook we add ingredients .'. we can't irreversible that. 3.chemical change formed new substance it is irreversible but in physical change no new substance formed and it is reversible thank you for teaching

[@Kawaichanuwu]

Who thinks that he should be in our school 👇👇

[@josiahogwang5531]

no.1 cocking is a chemical change because once cooked can't return to the raw form

[@fatemaahmad1702]

boiling of water and cutting of wood is physical change rusting of iron and respiration is chemical change Cooking of food is a chemical change as it involves the change in the composition of thefood. After cooking, the raw ingredients of the vegetables cannot be regained. change affects only physical properties i.e. shape, size, etc. Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc

[@ummidiappanna2838]

Sir please make a class on Trigonometry

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Sir wish u taught in my school ✨🛐🌸 Ur way of teaching is 🔥🔥🔥🔥🔥

[@lezcano78]

I like how he said it was a lemon but it was a lime. :0 :)

[@jeffreysiacor2415]

Nice

[@ManochaAcademy]

Thanks

[@fantomgaming9847]

@@ManochaAcademy hii

[@annapurnavuppalapati4916]

answers:- q1- a physical change b- chemical change c- chemical change d- physical change

[@namanbelwalsreviews2581]

ANSWER 1 :(a) Boiling of water is a physical change as if we boil that water in a container it will have the same mass as it had before boiling. (b)Rusting of iron is chemical change as new substance is formed from iron (i.e. Iron oxide is formed). (c) Respiration is a chemical change as new substances are formed (i.e. energy, water, carbon-dioxide ) from The breaking down of glucose from oxygen. (d) Cutting of wood is a physical change as no new substance is formed in the cutting of this wood but it is an Exceptional case like breaking of glass which can cannot be reversed similarly this also cannot be reversed but No new substance is formed which is more important therefore it is a physical change. ANSWER 2 :Cooking of food is a chemical change as new substances are formed from the raw Ingredients and it cannot be reversed, therefore it is a chemical change. ANSWER 3 : (1)Physical changes are reversible such as boiling of water , melting of ice cubes whereas chemical changes are irreversible.such as cooking of food,digestion of food. (2)New substances are formed in a chemical change such as when we cook food from raw ingredients we get some delicious food which is not as the ingredients whereas no new substances are formed in Physical changes such as cutting of wood. (3) Physical changes are usually temporary whereas chemical changes are permanent. BTW sir you are an awesome teacher you teach the subject of science the best in whole youtube Thanku for your such a great help.and never stop from making such amazing videos. Regards: ------- Naman Belwal ----------

[@ericcastro6141]

No cheating 😡

[@rajeevkumarsingh2419]

BEST WAY OF TEACHING. THANK Q SIR !! 🔥🔥🔥

[@ManochaAcademy]

Most welcome

[@rajeevkumarsingh2419]

oh what wait for a second!! Monocha Academy replied me .

[@slayyb_tch21]

1) a] PHYSICAL CHANGE , b]CHEMICAL CHANGE , c] CHEMICAL CHANGE , d] PHYSICAL CHANGE 2) COOKING OF FOOD IS CHEMICAL CHANGE AS A COMPLETELY NEW SUBSTANCE IS FORMED FROM THE RAW MATERIALS, AND IT IS IRREVERSIBLE

[@WaItAmInUtE142]

👍👍

[@ntandongcobo806]

Question 1 a)Physical change since we only changing the phase of water,no new substances are formed b)Chemical Change,rust is a new substance formed when iron reacts with oxygen C)Chemical change since it is the breakdown of food consumed to produce energy,also because it is irreversable and there is large energy change D)Physical change,no new substances formed since we only cutting the wood,we not burning to release energy in the air.It's still wood even though it's cutting Question 2: Chemical change,it is irreversable and there is large energy change(heat produced) Question 3: Physical change-No new substances formed,reversable,mass stays the same,small energy change Chemical change-new substances formed,irreversable,mass changes,large energy change

[@ravirk7315]

Q1; Bioling of water,respiration,(cutting of wood are physical changes can be reversible) Rusting of iron is a chemical change Q2;Cooking of food is chemical change Q3; CODE:New substances in a chemical change makes mass changes and irrereversible(permenant) and energy changes large other wise physical change .

[@srikarsri4859]

Same answer bro

[@hinasofy229]

Respiration is a chemical change, when we inspire o2, it reacts with glucose in cells, to give out co2 and h20. Hence chemical change since new substance is being formed.

[@GlobalAdventureswiththeSafari]

Q1: a) Boiling of water - Physical change b) Rusting of iron - Chemical change c) Respiration - Chemical change d) Cutting of wood - Physical change Q2: Cooking of food is a chemical change. When food is cooked, chemical reactions occur, such as the Maillard reaction, which changes the composition and properties of the food, leading to the formation of new substances with different chemical compositions and properties. Q3: 1. Physical changes do not involve the formation of new substances, while chemical changes do. 2. Physical changes usually involve changes in state or appearance, while chemical changes involve changes in chemical composition. 3. Physical changes are usually reversible by physical means (such as melting, freezing, or dissolving), while chemical changes are often irreversible or require specific chemical reactions to reverse.

[@trivenibr2500]

Ans 1 a. Physical change b. Chemical change c. Chemical change d. Physical change Ans 2 Chemical change because once we cook the food new substance are formed and are irreversible Ans 3 Physical change Changes which are temporary Changes which are reversible No new substance are formed. Chemical change Changes which are permanent Changes which are irreversible New substance are formed.

[@TinTinBW]

ty

[@liamsmollan8939]

What a brilliant Vid, i have a science test is 30 mins and this is going to help a lot!!!

[@ManochaAcademy]

Glad to hear

[@Onndwe]

Q1 a)physical change b)chemical change c)chemical change d)physical change Q2 Chemical change because it requires much energy and new substances are formed Q3 Physical change ●No new substance formed ●requires less energy ●No change in mass Chemical change ●new substance formed ●large amount of energy is required ●there's change in mass Please🙏 let me know if I did correctly or not??? And your video is useful and helpful.....Thank you

[@Onndwe]

@Dr T VIJAYA SARADHI S...o did I get them correctly

[@VishaAggarwal]

I guess you are correct. As my answers are also the same.

[@Onndwe]

@@VishaAggarwal Okay thanks

[@santoshjadhao7271]

Q.1 physical changes: boiling of water & cutting of wood Chemical changes: respiration & rusting of iron

[@sweetyundirwade3764]

I was sitting alone in my bedroom.....I was watching this video with earphone......the example of breaking the glass was very terrible.....I was truly scare but I wanna also enjoy watching this video......

[@mayiandsaisyoutubechannel1428]

Q1 A=physical change B=chemical change C=chemical change D=physical change

[@kxk8016]

A) boiling of water is physical B) rusting of iron is chemical C) respiration is chemical D) cutting of wood is physical Q2 Cooking of food is chemical due to the evidence new substances are formed also it is irreversible and the mass is also changing Q3 Chemical changes are irreversible, the mass usually change and new substances are formed While in physical changes no new substances formed, it is reversible and the mass does not change

[@ffthemelovers8321]

10:42 I thought my brother had broken glass while playing on terrace😂😅😅

[@skittle448]

I had a heartattack

[@just-a-pro-player5141]

Great examples I like it it helped me in my studies

[@ManochaAcademy]

Glad it helped!

[@katieee7]

hello sir. Just found ur video . Amazing time learning with you . Just a few doubts. 1. Give reasons why : a) the smell of hot sizzling food reaches you several meters away but to get the smell of cold food you gave to go close to it. b) a crystal of iodine on slow heating in a cold flask turns into vapour and fills the entire room. 2. One exmple of : a) an irreversible exothermic change. b) an undesirable endothermic change. i please u answer asap 😊

[@jitendrajadaun7194]

VERY NICE EXPLANITION 1

[@ManochaAcademy]

Thanks

[@anikashi1183]

You explain the best

[@paleoenthusiast]

Tomarrow is my final exam and this video is helping a lot, once i get my marks i will let you know, by commenting again : )

[@ManochaAcademy]

Best of luck!

[@paleoenthusiast]

@@ManochaAcademy thanks

[@paleoenthusiast]

Today was my Science final exam and I checked my paper with my friends and I got to know that I only got one question wrong from the chapter speed and motion, the question was of 2marks so I got 78/80marks as per me, I will wait for the final results

[@DILIPkumar-fn8ug]

A) physical change b;c;d are chemical changes & cooking of food is a chemical change & 3) mass ,new substance, absorption and release of energy

[@jacoblaynesa9916]

Nice i love to watch you again

[@ManochaAcademy]

Welcome back

[@vschannelteluguasd4930]

the raw sugar is converted into powder sugar so it is not a reversible so it is a chemical change

[@ManochaAcademy]

For chemical change new substance has to be formed. Since no new substance is formed it is a physical change. Even though it is irreversible.

[@kailasl.2895]

actually you are able to boil and strain the water therefor it is reversible

[@ashiiii16]

@@ManochaAcademy ohh ok

[@officaljay1132]

1.candle:chemical change 2.lemon:chemical change 3.sugar grinding:chemical change 4.melting of ice:chemical change mixing of sugar lemon & water:chemical change

[@sureshganesh7496]

Love you sir your teaching style is interesting .. I am waiting for next videos

[@ManochaAcademy]

Thanks a lot!! We will be definitely uploading more videos :) Do share it with your friends!