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THE GRAND REPUBLIC DAY PARADE. It is special feature of our Republic Day celebration. Feature means part. The 3 armed forces, that is the army, the navy and the air force participate in the parade. Students from various states and National Cadet Corps also take […]
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Hi, kids, we are going to do chapter number 19, India: Cities and Development. Here we go.
What is a city? A city is a large and densely populated urban area. Let us learn about the factors which lead to the transformation of […]
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Hello, everybody here we are learning something very interesting which will tell about ourselves. That is the human body. Have you ever been to a big hospital in your neighbourhood? Such hospitals have a department which deals with taking photographs of the parts inside the […]
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State Board English Std VIII
English Demo Video
(05)
Students, now we will start with our first news item. And it is regarding a girl, a brave girl who fought for her rights and then was also reserved for a National Bravery Award. Let’s look at the story. Asu Kanwar, […]
So, in the last lecture if you remember we had started off with discussion of mass
percentage composition in empirical and molecular formula and I had discussed that how do
you determine the mass percentage in various elements in a compound. To do that I had
told that we will take 1 mole of the compound and we […]
So, in the last lecture if you remember we had discussed the effect of dilution and mixing of
solution and also we had discussed these calculations which we do in stoichiometry based
on the strength terms like on basis of molarity, you had seen acid based neutralization or
double displacement example in which you had seen precipitation of […]
Okay, let’s begin today’s discussion. First of all, we have to discuss these questions which
yesterday I had given as homework. I will show you how to tackle these two questions. In
the last lecture we had discussed neutralization of HCl and NaOH. So what we will do, for
first question, we will mark the reaction HCl plus […]
Okay everyone we will start with the discussion of the two questions that we had taken as
homework last time. Okay, so the first question was, calculate the volume of concentrated
sulphuric acid whose density is 1.84 gram per millilitre and contains 98.0% H2SO4 by weight,
that would contain 40.0 grams pure H2SO4. How many of you have […]
So, let’s resume with the discussion of strength terms, in the previous lecture we had
discussed parts (00:13), now we will start with the next term and it is one of the very
important terms. The first term that we are going to do is, Molality. Molality is defined with
the symbol small m, okay, so first all […]
We had earlier defined what is the strength of a solution. We said that, the strength of a
solution is the amount of solute, amount is not necessary it is just a mass, it can be moles, it
can be volume also. So it is the amount of solute dissolved per unit solution or solvent, is
called as […]
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