Now, there are things which are called asiotropic mixtures as your trumps. They are called as your trumps. What are they? What are they? They are those liquids which boil at at the same temperature. So, what happens? You form a solution, you boil it earlier we had seen when we used to do distillation that one of the liquids has a higher boiling point and the other liquid from the component, the component of the solution, one of them will boil first and then the second will boil. But what happens? These are the mixtures where these are those solutions where the whole liquid boils at the same time. So, both the components when you boil them both the components come into the vapor phase at once. So, what happens? You will no longer be able to separate them by distillation methods. So, these are the liquid solutions with the same composition, with the same composition in the vapor as well as the liquid phase correct. So, what happens? Both the components of the solution boil at the same time boil at the same time thereby making it impossible. To separate them, components by distillation method. We understand that. So, you will not be able to separate them out by the distillation method that was considered a common method of separation. So, you boil it you have the same composition there. Otherwise what what used to happen when we boil? Suppose, suppose ethanol and water, ethanol used to evaporate first and water used to follow. So, that was one of the ways that was taught to us to separate these. But we are not able to do that in azure drops. Now, the azuretropic mixtures are also of two times. So, they are of two times they are the first is the minimum boiling. Minimum boiling. As you are trumps. Now, try to understand this is not something that you should try to remember. Just try to understand. What happens is minimum boiling. So, what it indicates is the boiling point becomes lesser than what you had predicted. How can that happen? In a solution the boiling point has become lesser than what you would have otherwise predicted. Why is that possible? No, what happens? Both are volatile here. Here both are volatile. So, when is that happening? When is that going to happen? Here both are volatile. See if one was non-volatile mi will it be azuretropic. It will never be azuretropic. Because it is present in the vapor phase also. We are talking about separating it out. If it was non-volatile, I did not have that bother right. So, both the components volatile. Negative or positive? Minimum boiling will have a positive deviation from the route law. So, these have see just try to understand these have positive deviation. These are positive deviation solutions. Why? What happens? You have put them together and they are giving you a vapor pressure that is more than you expected. Now, when does a solution boil? It boils when? So, what happens? You will reach that vapor pressure at a low temperature than other ways. No? No. That depends on that cost. Atmospheric pressure is constant. When you are saying about boiling point, you always measure everything with respect to the atmospheric pressure. What if vapor pressure is already higher than it cost? It will not be a liquid. It will be a vapor already. Is it not? So, the positive deviation solutions will give you a minimum boiling azuretrop and in a similar manner, the maximum boiling, maximum boiling azuretrops will be, will be what? You will have to heat it more. So, these are negative deviation solutions. These are negative deviation solutions. The mixture which are otherwise not azuretrop at certain at at at a certain temperature, they suddenly turn azuretrops. So, for example, 95 percent ethanol and 5 percent water, 95 percent ethanol and 5 percent water that is an azuretrop. So, 95 percent ethanol? No, no. Azuretrops have to be in the positive and negative. So, they have to be non-ideal. Right? 95 percent ethanol plus 5 percent water is an azuretrop. Is that? What kind of solution will be? Azuretrop. No, no. Will follow. No. Okay. So, the positive one. This is the positive one. This is the positive one and this, the nitric acid and water. 68 percent nitric acid and 32 percent, 68 percent nitric acid plus 32 percent water by mass. That is a negative deviation as the atron.