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
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.
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
Q1Ans= a is physical change b is chemical change c is chemical change d is physical change. Q2 ans= chemical change cause its mass of substance is changing 😅 confused
Q1 A) Physical change. B) Chemical change C) Chemical change D) Physical change Q2= Cooking of food is chemical change because a new substance is formed . Q3 Physical change 1. In a physical change no change of substance. 2.Reversible. 3.The mass stays the same. Chemical change 1.A new substance formed. 2.Irreversible. 3.Mass changes. Sir I am in class 6 . Would you please check my answers
B.P is the physical changes while others respiration and rusting of Iron is the Chemical change and cutting of wood is the physical change. 2: yes, cooking is the Chemical change because it's produce a new product which is eatable while pre cooked food was not eatable... 3 Chemical and physical difference 1 when any substance chemically mixed it will be able to distinguish/separate out. 2 it will gives a new product which not convertable back to it's original form Many of chemical change spitounius changes (not for all).
q1.a is physical ,b. ischemical,c.is chemical and d. is physical q2.ooking of food gives out new substances in the form of gasses and other things, therefore it is chemical. q3.1.In a physical change no new substances are formed, however in a chemical change new substances are formed. 2.A physical change is usually reversable and a chemical change is usually permanent. 3.The mass of the reactant and product in the chemical change is different and the mass in a physical change remains the same.
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......
1A a physical change, b chemical change ,c physical change ,d physical change . 2A Cooking of food is chemical change Example: If a vegetable is cooked (potato ) we cant bring potato curry back to potato so it is irreversible, and new substance is formed . 3A Physical changes Chemical changes They are reversible They are irreversible mass wont change mass will change temporary permanent
Q1. Physical changes; Boiling of water and cutting of wood. Chemical changes; Rusting of iron and respiration. Q2. Chemical change, bcuz new substance is formed and the food is irreversible. Q3. Physical changes; No new substance is formed but chemical change, new substance is formed. Physical changes, reversible but, chemical change, irreversible. Chemical change, mass of substance usually change but, physical changes, mass substance remain the same.
1. a) Physical change. b) chemical change. c) chemical change. d) physical change. 2. Cooking of is both chemical and physical change. 3. 1) Physical changes are reversible changes. Chemical changes are irreversible changes. 2) In physical changes no new substances are formed. In chemical changes new substances are formed.
Ans 1 a. Boiling of water- Physical change b. Chemical change c. Chemical change d. Chemical change Ans 2 Physical change. It cannot be reversible, new substances are formed. Ans 3 Physical change: *Change which are temporary and reversible * No new substance are formed Chemical change: * Change which are permanent and irreversible * New substance are formed.
Q1 a physical change B chemical changes C chemicals change D physical change Q2 chemical change as new substance is formed and its irreversible Q3 physical change 1 no new substance formed 2 reversible 3 Wight doesn't change Chemical change 1 new substance is formed 2 irreversible 3 weight is changed By Harshita divgaya class VI6 Mahanadi RDPS betul
Ans 1a)physical changes B)chemical changes C)chemical changes D)physical changes Ans-2 Cooking of food is a chemical change as a new substance is formed and it is irreversible.
1a)physical change B) chemical change C) chamical change D) physical change 2it is chemical change because a new substance is produced and it is not be reversed 3 physical :no new substance is formed These are reversable The have same mass Chemicals : the produces a new substance They are not reversable They do not same mass
Answer 1) Boiling of water: Physical change 2) Rusting of Iron : Chemical change 3) Respiration : Chemical change 4) Cutting of wood : Physical change -------------------------------------------------------------------- Answer the question 1) Cooking of food is a chemical change because it form a new substance. --------------------------------------------------------------------- 2) Difference between PHYSICAL AND CHEMICAL CHANGES. ----------------------------------------------------------------- PHYSICAL CHANGES: * No new substances formed * Use of very little energy * These are temporary changes and it can be reversible --------------------------------------------------------------------- CHEMICAL CHANGES: * New substances formed * It contains lot of energy * These are permanent changes and cannot be reversed.. ----------------------------------------------------------------- Now I am clear with this chapter in this video Thanks for upload this video 😃 ________________________________________
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
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. 😊
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 )
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
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
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.
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
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.
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
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
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
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
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.
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 ----------
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
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
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 .
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.
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
@@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
@@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.
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
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.
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
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
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
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.
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!
