1 . a ) Physical change b) Chemical change c) Chemical change d ) Physical change 2) Cooking food is a chemical change because when food is cooked new substance is formed and it is irreversible reaction . 3 ) No new substance are formed in physical change . Most of the physical change are reversible. Example - Boiling of water On other hand new substance are formed in chemical change. Most of the reaction of chemical change are irreversible. Example- Cooking food .
Boiling of water :-physical change Cooking of food:-chemical change Cutting of wood:-physical change Rusting of iron:-chemical change Respiration:-chemical change
In making lemonade can we get lemon juice and sugar back?then why it is consider as physical change aur yeh wapis reverse b nhi horaha hum lemon ko Pani se wapis kase nikalen
Yes, the lemon juice and sugar can be recovered from lemonade, which is why making lemonade is considered a physical change: No new substances formed When lemon juice and sugar are mixed with water, no new substances are created. The sugar and lemon juice simply dissolve in the water. Reversible The powder and water can be separated again by evaporation, demonstrating that this is a reversible physical change. No change in color, smell, or temperature Mixing lemon juice and sugar does not change the mixture's color, smell, or temperature.
Q1. (a) chemical change, (b) chemical change (C) chemical change (d) physical change Q2. Cooking of food is chemical change because the mass is irreversible. Q3. Physical change - New physical formation can appearance. - Reversible in nature - Mass is constant Chemical change - No new physical formation - Irreversible - Mass is alternate
1) A) physical change B) chemical change C) chemical change D) chemical 2) cooking of food is chemical change because as it involves the change in the composition of the food. After cooking, the raw ingredients of the vegetables cannot be regained. 3) Physical change is a temporary change. A chemical change is a permanent change. . Some examples of physical change arefreezing of water, melting of wax, boiling of water, . A few examples of chemical change are digestion of food, burning of coal, rusting Sir plz reply my answer
You are the awesome teacher in the world I have seen you explained it very cleary by examples. I am so glad that I have seen this vedio during my exams thanks a lot sir for your explanation 🥰🥰🥰🥰🥰🥰🥰. Everyone please like this video
1.1 Physical change 1.2 chemical change 1.3 chemical change 1.4 Physical change Ans2. Cooking is chemical change because it is make a new subtance and not is reversible. Ans3. Chemical change - 1. Make a new substance 2. Irreversible 3. Change of mass Physical Change- 1.no make a new substance 2. Reversible 3. Unchange mass.
question 1 a=physical change b=chemical change c=physical change d=physical change question 2 chemical change because new substance is formed question 3 PHYSICAL CHANGE= 1. no new substance is formed 2. mass remain unchange 3. In this change physical properties change CHEMICAL CHANGE= 1. new substance is formed 2. mass changes 3. In this change chemical properties change
Sir question 1 a) physical change b) chemical change c) chemical change d) physical change Questions 2 Answer- it is chemical change because they produce new substances that are entirely new chemical compound Questions 3 Answer - physical change- they are reversible, new substances is not formed, mass is same Chemical change - they are irreversible, new substances is formed, mass is not same. Examples of physical change - melting of ice cube into water, dissolving of sugar into water Examples of chemical change- burning of magnesium, rusting of iron. Examples for reversible change- melting of ice and freezing of water Example for irreversible change-burning of magnesium Example for periodic change-change of seasons Example for non periodic change- change of weather Example for slow change-seed growing into a tree Example for fast change- occruing of lightning
Q 2 i am thinking that like for example tea first we take some water now the water is boiling then we add some sugar and tea the boiling of water,sugar and tea is physical change then we add milk but milk is used everywhere like shake, paneer, curd so milk is chemical
Dissolving of water chemical change ha Mixing lemon salt and water bhi chemical change ha Sir burning of candle bhi physical change ha apne jo candle use ki ha vo alag ha ager hm normal candle use kare to uski mom bach jati ha or usko ikhta karke dubra candle bana sakte ha
Chemical change examples 1. Burning of papers 2. Burning of wood Physical change example 1. Clothes Drying 2. Tearing of paper Are my answers correct ?
(1) Physical Change - boiling of water, cutting of wood Chemical change - rusting of iron, respiration (2) Cooking of food is chemical change. example - Making of bread, chappati (3) Physical change - no new substance formed, reversible, mass doesn't change. Chemical change - new substance made, irreversible, mass change
@@mannuphougat5717 Mistakes: Physical: boiling of water may change chemical property at micro level similarly, cutting of wood somewhat burn wood at micro level, cooking of food is physico-chemical change. Physical and chemical has no direct relation with Reversibility. Mass can change in physical reaction also. Possibly this one also almost correct.
Q1. A) chemical change. B) chemical change. C) chemical change. D) physical change. Q2. Cooking of food is a chemical change because the ingredients we have used in making the dish/food cannot come back to their original form. Hence cooking of is a chemical change. Q3. Physical change :- 1. No new substance is formed. 2. They can be reversible. 3. A little energy is consumed and released. B). Chemical change. 1. New substance is formed. 2. They are irreversible. 3. Lot of energy is consumed and released.
ques.1 (a)physical change(b)chemical change(c)chemical change(d)physical change ques.2 cooking of food is chemical changes bcoz cooking of food irrversible and new substance formed ques.physical change- 1-no new substance formed 2-it is rversible 3-it is temprory change chemical change-new substance formed 2-it is reversible change3-it is permanent in nature
1 Chemical change 2 chemical change 3 Physical change 4 Physical change Question 2 chemical change, because A chemical change is type of change that new substance is formed.
1 (a) Phisical changes (b) Chemical changes (c) Chemical changes (d)Phisical changes 2 It is Cemical changes because it doesn't reversabale and the mass of food is change after cook 3 Chemical changes- New substance is form Energy is large Irreversible Phisical changes No New substance is form Energy is small reversible Mass is different. My answers is done
1 . a ) Physical change
b) Chemical change
c) Chemical change
d ) Physical change
2) Cooking food is a chemical change because when food is cooked new substance is formed and it is irreversible reaction .
3 ) No new substance are formed in physical change . Most of the physical change are reversible. Example - Boiling of water
On other hand new substance are formed in chemical change. Most of the reaction of chemical change are irreversible. Example- Cooking food .
Sir please upload more video for class 7th superb teaching ☺️
Vow!!What an interesting video.👍👍👏👏👏👏👏
Boiling of water :-physical change
Cooking of food:-chemical change
Cutting of wood:-physical change
Rusting of iron:-chemical change
Respiration:-chemical change
Very nicely explained sir 🤩🤩🤩wow understood everything nicely.
Thank you so much ❤❤sit
Sir
1=boiling of water and rusting of iron 2=cooking of food is chemical change because we don't get that food again
Thanks sir for telling very easily
Nice explanation
Method of teaching is too gud sir🙏🙏🙏
Sir very good thanku for nice explanation Love for india
Yes sir
No
Thank you sir it was very helpful for my exams
Q2:- Yes, it is a chemical change. REASON:- For eg:- when we cook food add spices to a vegetable, the spices can't be seperated from the vegetable
In making lemonade can we get lemon juice and sugar back?then why it is consider as physical change aur yeh wapis reverse b nhi horaha hum lemon ko Pani se wapis kase nikalen
Sometimes it is irreversible.
Mayebe by some sort of evaporation ,u can get ur lemon back!
Thanks sir 👍👍👍👍👍👍👍😀😀😀😀😀😊😊😊😊😊
And now i know the difference between chemical change and physical change💜
in making lemonade, can we get lemon juice and sugar back?? then why this is consider as physical change?
Yes, the lemon juice and sugar can be recovered from lemonade, which is why making lemonade is considered a physical change:
No new substances formed
When lemon juice and sugar are mixed with water, no new substances are created. The sugar and lemon juice simply dissolve in the water.
Reversible
The powder and water can be separated again by evaporation, demonstrating that this is a reversible physical change.
No change in color, smell, or temperature
Mixing lemon juice and sugar does not change the mixture's color, smell, or temperature.
Thank you so much sir you explain it very well thnx sir
Thank you so much
Happy to hear that you liked the video :) Thanks!!
@@ManochaAcademyHindi thanks ye video banane ke liye
Thnx a lot.....sir......😀😁😃😄
This is very knowledgeable video thank you sir for this video
Sir you are best
😁
if we mix lemon,sugar,salt and ice a new substance is formed which is called shikangi
Q1.
(a) chemical change, (b) chemical change
(C) chemical change (d) physical change
Q2. Cooking of food is chemical change because the mass is irreversible.
Q3. Physical change
- New physical formation can appearance.
- Reversible in nature
- Mass is constant
Chemical change
- No new physical formation
- Irreversible
- Mass is alternate
Pubg khelta hai
The legends will see this video,the day before the exam😂
After watching this, I'll be going to make refreshing lemonade water😂😋😋
🤣🤣🤣🤣🤣🤣🤣🤣
Padhna likhna Aata Nahin kya Jo answer Nahin bata sakte the yah sab likhane ki kya jarurat thi
Out standing Sir .. very nice... 👍👍👍👌👌👌
Tour are teaching way is very good
Thank you!!
1)
A) physical change
B) chemical change
C) chemical change
D) chemical
2) cooking of food is chemical change because as it involves the change in the composition of the food. After cooking, the raw ingredients of the vegetables cannot be regained.
3) Physical change is a temporary change. A chemical change is a permanent change. . Some examples of physical change arefreezing of water, melting of wax, boiling of water, . A few examples of chemical change are digestion of food, burning of coal, rusting
Sir plz reply my answer
Absolutely 😊😊😊
Thanks sir
X
Nice
You are the best teacher in the world your explanation is very easy and simple and different thanks to teach us
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U are from uttrahand
Superb you are science expert👍😊
Thank you sir 🙏🏼🙏🏼
You have explained very nicely 🤗 thankyou sir 🙂🙂
Sir your explanation was amazing 😊😊
You are the awesome teacher in the world I have seen you explained it very cleary by examples. I am so glad that I have seen this vedio during my exams thanks a lot sir for your explanation 🥰🥰🥰🥰🥰🥰🥰. Everyone please like this video
Thanks sir beautiful video and material and their properties
Reading ⛔ Cooking ✅
You are right 😂
Bhai koi sence hai kya 🙂
Yes bro mere ko lagata h ye phele chef the 1:28
Thank you so much💯💯👍👍
Thank you ,sir for such a clear explanation 😀😀
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yes
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sir you are best first teacher i love in youtube because you are giving example and explanation
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May you and your family and your team live thousands of years
Thank a lot
Mai bhut channel pe gaya kuch samajh me nahi aaya but is channel pe samajh aa aya great help of student
Along with physical and chemical change he also taught how to make lemonade ......😁😋
Yes
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Lol
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Excellent teaching sir thank😘😘😘
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Thank u so much sir your great ..l understand properly and l can do this 3 question 👍
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1.1 Physical change
1.2 chemical change
1.3 chemical change
1.4 Physical change
Ans2. Cooking is chemical change because it is make a new subtance and not is reversible.
Ans3. Chemical change -
1. Make a new substance
2. Irreversible
3. Change of mass
Physical Change-
1.no make a new substance
2. Reversible
3. Unchange mass.
Thank you sir for teaching us🙏🙏🙏
Thank you sir for explaining 😊
1:- cutting of wood
3:- physical change : no new substance are formed
Chemical change :- new substance are formed
Physical change are ... a) boiling of water , d) cutting of wood .... Chemical changes are .. b) rusting of iron ,c) respiration 😎🙏🏻
Nice video of physical and chemical change
you are best teacher
Best channel for concept clearing
question 1 a=physical change
b=chemical change
c=physical change
d=physical change
question 2 chemical change because new substance is formed
question 3
PHYSICAL CHANGE=
1. no new substance is formed
2. mass remain unchange
3. In this change physical properties change
CHEMICAL CHANGE=
1. new substance is formed
2. mass changes
3. In this change chemical properties change
you are very intelligent .
Amazing👍🤩
Wa wa thank you sir
Thank you so much it's very helpful video
You are the great sir ❤❤❤😊
Sir question 1
a) physical change
b) chemical change
c) chemical change
d) physical change
Questions 2
Answer- it is chemical change because they produce new substances that are entirely new chemical compound
Questions 3
Answer - physical change- they are reversible, new substances is not formed, mass is same
Chemical change - they are irreversible, new substances is formed, mass is not same.
Examples of physical change - melting of ice cube into water, dissolving of sugar into water
Examples of chemical change- burning of magnesium, rusting of iron.
Examples for reversible change- melting of ice and freezing of water
Example for irreversible change-burning of magnesium
Example for periodic change-change of seasons
Example for non periodic change- change of weather
Example for slow change-seed growing into a tree
Example for fast change- occruing of lightning
Q 2 i am thinking that like for example tea first we take some water now the water is boiling then we add some sugar and tea the boiling of water,sugar and tea is physical change then we add milk but milk is used everywhere like shake, paneer, curd so milk is chemical
Simpel and sweet
Sir app bohot acha padhate he ☺️
Dissolving of water chemical change ha
Mixing lemon salt and water bhi chemical change ha
Sir burning of candle bhi physical change ha apne jo candle use ki ha vo alag ha ager hm normal candle use kare to uski mom bach jati ha or usko ikhta karke dubra candle bana sakte ha
Burning of candle chemical change hai!!
@@Sumit_rai49 kse hm candle ko dubra candle bana sakte ha bro
@@nisthacrazygirl5853 melting of a candle physical change hai iss se mom ikatha kr fir se candle bana skte hai
Thank you 🤗
Chemical change examples
1. Burning of papers
2. Burning of wood
Physical change example
1. Clothes Drying
2. Tearing of paper
Are my answers correct ?
Sir you explained very nicely 👌
Thank you sir telling very nice 💞🙏🙏👍👍👍
No new substances is formed in physical change but New substance is formed in chemical change It is difference between physical and chemical change
(1) Physical Change - boiling of water, cutting of wood
Chemical change - rusting of iron, respiration
(2) Cooking of food is chemical change. example - Making of bread, chappati
(3) Physical change - no new substance formed, reversible, mass doesn't change.
Chemical change - new substance made, irreversible, mass change
Yaa it's right 👍
It’s almost right.
It's absolutely correct
@@mannuphougat5717 Mistakes: Physical: boiling of water may change chemical property at micro level similarly, cutting of wood somewhat burn wood at micro level, cooking of food is physico-chemical change. Physical and chemical has no direct relation with Reversibility. Mass can change in physical reaction also.
Possibly this one also almost correct.
@@jeminkukadiya13 sorry bro I can't understand you ....because of your words like *micro level* . My teacher doesn't tell us deeply.so...
Q2..This chemical change happened because it is getting new food in it. We get energy by eating energy in food.
Q1. A) chemical change.
B) chemical change.
C) chemical change.
D) physical change.
Q2. Cooking of food is a chemical change because the ingredients we have used in making the dish/food cannot come back to their original form. Hence cooking of is a chemical change.
Q3. Physical change :-
1. No new substance is formed.
2. They can be reversible.
3. A little energy is consumed and released.
B). Chemical change.
1. New substance is formed.
2. They are irreversible.
3. Lot of energy is consumed and released.
Thanku sir it's really very helpful 🥰💯
Ha
Two things in this video recipe and education
ques.1
(a)physical change(b)chemical change(c)chemical change(d)physical change
ques.2 cooking of food is chemical changes bcoz cooking of food irrversible and new substance formed ques.physical change- 1-no new substance formed 2-it is rversible 3-it is temprory change
chemical change-new substance formed 2-it is reversible change3-it is permanent in nature
Sir I know all answer and
Thank you so much sir
♥️
Thankyou soooo much sir very easy explanation
Thanks for explaining nice ☺️👍
please explain the entire chapter breefly
Chemical change: burning of candle & physical change:melting of wax..
Sir aapne practical kr ke dikaya jise sab samaj aa gaya Thank you Sir
Btw aapne sikha diya Lemonade kaise banate h 😂😅
1 Chemical change
2 chemical change
3 Physical change
4 Physical change
Question 2 chemical change, because A chemical change is type of change that new substance is formed.
Amazing ,keep doing, don't listen to haters🥰
Sir thank you Kal Mera paper h or apne bhout ache se padya
1
(a) Phisical changes
(b) Chemical changes
(c) Chemical changes
(d)Phisical changes
2
It is Cemical changes because it doesn't reversabale and the mass of food is change after cook
3
Chemical changes-
New substance is form
Energy is large
Irreversible
Phisical changes
No New substance is form
Energy is small
reversible
Mass is different.
My answers is done
Very nice❤
Hi
@@dalbirkaur3868 hi