Question 4 Objective Type Questions Next
Answer:
Solution:
Video transcript Hey hello everyone so hope everyone is doing well so this is our question here, we need to select the correct answer from the choice in the bracket to complete each sentence okay so the first fill up says dust in the air is an examples of homogeneous or heterogeneous mixture well I'll go for the homogeneous reasons being dust is evenly distributed throughout in the air right so they like the characteristics of homogeneous as in uniform composition is being satisfied then then the other reason being it is like it exists in one phase only that is the mixture of dust in the air All right. so hence uh like homogeneous would be will be the answer for the first one now coming on to the second one a soluble solid is separated from an insoluble solid okay so we have this container and in this we have some soluble solid inside it and some insoluble solid okay so this is the blue one that is insoluble and the red one is soluble, and this is a liquid all right so the these red particles as in these red solute will are soluble ones so they are dissolved in this liquid and we'll only be left with what these blue particles right so we'll be left only with the blue particles so what we can do is we can use the solvent extraction method to extract this solvent and we'll be left with only these uh insoluble particles in the container so hence the soluble solid has been separated from the insoluble solid okay so this is our answer solvent extraction right now coming on to the fourth one sorry third one so in the third one the reactive elements from the two mono atomic element is well when we talk about the third one neon is an inert gas as in it has its outer shell is fully filled so it is in it has a stable configuration and it doesn't react with it doesn't react it is the most stable one of the most stable elements that exist so yeah our answer will be silicon over here okay so we have eliminated here we have used the elimination Trick okay now coming on to the fourth one compound are homogeneous or heterogeneous and always homogeneous in it okay so compounds basically would be uh we have seen they have uniforms composition all in like in the compounds every molecule will have a similar configuration and they can't be broken down physically right so hence they are always homogeneous, the answer is always homogeneous in nature right they can't be separated from any physical the process they need some chemical process and to separate them the elements in the compounds okay now coming on to the fifth one we need to give an example of a monoatomic molecule that is among hydrogen and helium well the answer is helium. because again helium is a very stable compound Helium is a very stable element as in it satisfies the stable configuration in it's the last the shell that is of two electrons hence it is it doesn't react to anyone and hence exist in a form of single as in monoatomic molecule while hydrogen has one uh electron in its outer shell so it pairs up with other hydrogen and forms the The double compound that is h2 diatomic molecule okay not compound diatomic molecule okay this is an elementary state this is an element not compounded okay so yes hopefully every answer is clear and thank you hope this helped you
Was This helpful? Formation of a mixture is a physical change Its constituents do not retain their individual properties Open in App 2
Option 1 : Uniform composition
100 Questions 200 Marks 120 Mins
The correct answer is Uniform composition. Heterogeneous Mixture -
Examples of Heterogeneous Mixtures
Homogeneous Vs. Heterogeneous Mixtures
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Which statement is true about a heterogeneous mixture but not of a homogeneous mixture
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