Some basic concept of chemistry

[00:00:04]Chemistry.

[00:00:07]Chemistry is a very important and very interesting subject and you know that everything is just made with the chemistry and uh I want to just explain here. I want to just go to explain here uh basic concept of the chemistry class 11th chapter first. Uh this is very important top uh chapter for everyone and we know that uh in this chapter we uh realize uh we revise all of the things uh that is we studied in the last classes and everything is just uh very important uh which is uh revised in this chapter that uh What things is in your life that is related to the chemistry? You should don't know uh you should know that uh the cloth which is made with the chemistry chemicals that is uh also provided by the chemistry and uh all of the medicines that you use uh illness time and uh sickness time that is made with the chemicals and that is also pro by the chemistry and all of the things uh here Here you can uh see in your daily life that toothpaste and toothbrush all of the things made with the chemistry and uh our main important diets uh that is uh protein, fat and carbide.

[00:01:54]All of the things that is uh uh related to the chemistry that is uh provided by the chemistry and uh in the space and uh in your search and everywhere you can find that load of the chemicals are used in your and your future and uh Every aspect of the life you used lot of chemicals.

[00:02:29]Now we are here to share it that is very important. You enjoy with their tools play a lot of games that is uh that's instruments are also made with the chemicals uh that is provided by the chemistry.

[00:02:52]Now we want to say that uh something that is uh related to your topic of your chapter.

[00:03:03]I want to say uh the matter everywhere you find that matter and how many types of matter you should just comment in your comment box how many types of the matters.

[00:03:19]Everyone know that the matter can be uh then the matter which is uh which have the volume and having the mass is called matter and it can cate categorized in three category normally that is solid, liquid and gas. But in the aspect of the chemistry this is on the basis of the physical appearance physical status of the compound uh physical status of the matter. But I want to say that we are here to study the chemistry and in the chemistry the matter is categorized in two category that is mixture and pure form of the matter. Mixture if you uh mix together two or more components two or more matter that may be homogeneous or heterogeneous. Homogeneous means the mixture have a definite ratio to mix together and this type of the mixture cannot be separated by the physical method and they cannot be identified with your naked eyes.

[00:04:34]uh with the naked eyes you can see that uh the chem the matter which are uh combined together or mixed together have a same property seen just same and there are no any difference between them. So you can say that is homogeneous. Uh this uh is more popular example is uh solution.

[00:05:04]So uh you can give example of the solution that uh is uh commonly you can find that uh water and table salt and uh sugar and the water and uh same time you can say that uh the uh today's is very uh popular and controversial solution is the petroleum and ethanol E20 that is uh too much highlighted in in the social media and a lot of the social uh platform and government are also facing a lot of the problems with the I want to say uh the mixture which mixture you can find in your life you can say if you have any mixture you can have any solution example of the solutions I'm saying another example that is too much popular and everyone know that the water and ethanol ethanol that is alcohol and too much uh famous in the society which are drunk drunk to the alcohol and I want to say this is the homogeneous mixture. Another type of the mixture that is uh heterogenous mixture.

[00:06:27]Hogenous mixture or mixture of two or more uh material which can be identified. Okay.

[00:07:17]Yes s uh which comment here have any problem.

[00:07:37]Problem face.

[00:07:44]Hi.

[00:07:54]Take care. In fact, I'm attending the class with the mobile.

[00:08:06]I'm I'm unable to see the comment. But I hope to you that you should just comment if uh you have any questions or have any solution to comment in the comment box. So uh I want to say that uh I'm saying the topic heterogenous mixture. Heterogeneous means two or more material are combined together and uh that uh identities are revealed by the physical methods that can be identified by the physical method and that physical method can be separate to uh that uh kind of the matters and that is uh another type of the mixture and it can also name at collide solution. You know that collide solution collide solution is a heterogenous mixture and suspension.

[00:09:09]Uh suspension is uh such type of the mixture that can be easily separated means the solvent or too much loss uh particle that can be settled down in their vitamin and you can find uh in their atoalium syrup and uh you can also find in the uh solution if you make the solution of the uh chalk chalk that is calcium carbonate. Calcium carbonate is generally find out in their classroom with if the teacher is stasis with the chalk that is uh calcium carbonate and uh that's mixture with the water is called suspension. You can say that too much uh good example in your life. You can find that mud means shil and water that is also mixture of the uh suspension.

[00:10:13]There is lot of examples in your life and you can find uh another example in your life. I hope to write example of daily life you can find that is a heterogenous mixture and uh I want to take another topic that is pure pure mixture and pure matter. Pure matter have identical type of the uh uh unit that is repeatedly get together to forms a matter and that is only one type of the uh matter.

[00:11:02]uh it can it can be categorized in two category that one of them is uh element and another is compound. Element is the smallest entities which repeatedly combine to forms the matter and uh it have the only one type of the atoms.

[00:11:26]Similarly another type of the com uh category that is a compound. Compound is a group of the elements which combine to form a unit and the unit forms get together uh as sustain you can say that you can say that here um H2O hydrogen and oxygen this forms the compound compound and C6 H2O6 that is the sugar and this molec molecule of the compound forms a sugar and NCL similarly you can say that NCL Na that is the sodium and CL L that is the chlorine. Uh both have the bond between them and it forms with table salt. Salt or table salt and this type of the matter is called what type the matters? This type of matter is called compound and uh it have two or more element which is chemically bonded to each other. I want to know that another example you have learn in their daily life or here there and everywhere you can find that is the example of compound. You should write in their comment box.

[00:13:22]I have to be that good uh example you know well known that can write the example in your comment box I very uh uh many persons are uh watching the video with no one write the example I hope everyone know that.

[00:13:54]I'm sure that you know that. But why you not writing the example in your comment box?

[00:14:02]Please, you should write the example of compound in the comment box.

[00:14:11]Please, you should write the example of compound in your comment box.

[00:14:21]Don't worry this is a m this uh is the matter and now I have another topic that is the unit unit or it is also known as physical quantities.

[00:14:45]uh s physical contacttors and units which unit what is the unit.

[00:14:53]If you want to say that if I say uh to you that you should uh measure the length of here to here.

[00:15:07]What you should do that commonly the students are uh uh measure it in this way that this is the way and the height of the different uh different students are not same and then this is some student find that this is the five and another student can uh measure it six.

[00:15:46]But if you uh measure anything in any measurement that will be same here there or for you for me and for any other persons that is the ideal uh unit but if someone say that I can uh measure it in this way and This is not also ideal uh measurement because uh here also you can find that the length of hand is different to person to person and this measurement is not similar for all of the persons. So we should just uh have we should have a definite length to measure with that and this will be also same for you and me and another person and here and there net only here not only there everywhere that's measurement will be same that is the unit and similarly you can say that uh you can find uh in the past period that there was a border system. What the bal system? Water system means uh uh anyone gives you a uh material that is grain in tori in basket and another person uh exchange with the another material with the basket.

[00:17:36]it no one can say that we give you a same amount of the matter and uh no one can say that that can take same amount of the matters. So here uh international units can be decided by the uh some everyone for every person's will be same that is five uh type the physical base physical quantities that is physical quantities and symbol and unit and uh symbol in this way which what is the base physical quantities? First of all we can write here the length length and length is denoted by L and unit is meter. Meter is also symbolized as a small m.

[00:18:53]And uh second is mass.

[00:18:58]And mass is symbolized as small m and mass is measured in the unit kilo and K is the symbol of kilo.

[00:19:14]And third basic physical quantity is time.

[00:19:20]Time is symbolized as small t. What is small t and its symbol uh its unit is second that is symbolized as small s and fourth basic unit is electric current with electric current I and its unit is a capital A is the symbol of this physical quantity.

[00:20:05]And now fifth fifth is the you can find that uh amount of substance s.

[00:20:26]Uh fifth is amount of substance of substance that is denoted by n and its unit is mole uh and its symbol is mole. here is not E only means uh in the unit and the symbol have the difference between uh difference only E and another six temperature that is denoted by capital T and its unit is Kelvin Kelvin that is denoted Okay. K, capital K. And at last seventh, seventh unit, seventh physical quantity that is intensity of light. intensity of light of light and that is IV and it its uh unit is candela candela CV there are total uh seven physical quantities and their units we should just Uh comment.

[00:22:11]Oh sorry dear student video clear.

[00:22:34]Sorry dear student actually I or friend video camera.

[00:23:46]I think clear. I I hope uh that you will be satisfied.

[00:23:58]So we are taking another some smallest to largest unit which are generally used in our uh study.

[00:24:10]Uh I want to start a smallest unit to the larger unit. So you can write here 10 ^ minus 5 that is pa huh fam that is divided by f and 10 ^ minus 12 that is pico uh pico and small divided by small P and you know that 10^ - 9 that is nano and ded by small N and uh in between them a measurement of 10 ^ - 9 what is known as 10 ^ - 9 uh 10 ^ - 10 you should write the name of this small unit in the comment box. I have to you that you should write the name of this small unit and this is very popular in uh botney geology and such type of things studies by the microscope.

[00:25:37]Similarly uh another example I want to write here that 10 ^ - 6 that is micro uh that is symbolized by that is symbolized by micro and another uh now we are saying that a large unit that is 10 ^ 3 that is kilo and divided by k and 10 ^ 6 that is mega a small m symbol and 10 ^ minus uh 10 ^ uh 9 that is giga capital G and 10 ^ 10 ^ 12 that is terra that is symbolize is as a t and another symbolize s t capital t and uh another is that is 10 ^ 15.

[00:27:08]This is the beta beta P.

[00:27:13]This some small and large unit are generally used in your study and in your daily life that uh Pico Pico is use Pico and Nano. This is these are used to measure the wet.

[00:27:35]This is the orbital and another micro. Micro is used to measure the uh length of bacteria. And uh this is a angle storm. I asked you the name of this measurement that is angle storm.

[00:27:59]You should just use to measure the also my uh bacteria and virus length of uh in this unit. And uh another unit kilo generally used you used in your daily life uh you bought the vegetables in kilogram and fruits also bought measurement of kilogram. Mega Mega is a large unit and uh giga is uh used in a computer uh computer calculations uh that is uh giga giga is generally used for CPU CPU calculations and terra terra and pa these are used to measure the uh storage of storage of computer.

[00:29:07]HDD hard drive storage of computer uh that is known as hard drive means storage of hard drive you can measure in terra and beta.

[00:29:22]This is very important uh units to use in our daily life and uh you should just find this is uh very important and uh you must use if you have a computer that you know that your uh uh hardd have the capacity 1TB 1 terabyte.

[00:29:50]sometime you have the SDDD 500 GB and you have the mobile uh that's storage is uh about 128 GB GB is the storage uh sorry dear student my mobile battery is down to cannot too long uh with the live.

[00:30:24]So I want to stop the lab here and uh next day we continue this topic again and similar time about uh after 10 to the after 10:00 in the night I have to you should just meet with me and uh I request you that you should just like this live A lot of the persons are watched but only one person like this live. Please I got a desired energy to your like so please goodbye.