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Assertion:The sea water can be classified as a homogeneous as well as heterogeneous mixture. Reason:The sea water contains the mixture of salt and some other bigger size of impurities as well as the mixture of several gases. A.Both assertion and reason are correct and reason is the correct explanation for assertion B.Both assertion and reason are correct but reason is not the correct explanation for assertion C.Assertion is correct but reason is incorrect D.Both assertion and reason are correct

Assertion:The sea water can be classified as a homogeneous as well as heterogeneous mixture.
Reason:The sea water contains the mixture of salt and some other bigger size of impurities as well as the mixture of several gases.
A.Both assertion and reason are correct and reason is the correct explanation for assertion
B.Both assertion and reason are correct but reason is not the correct explanation for assertion
C.Assertion is correct but reason is incorrect
D.Both assertion and reason are correct

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 9723 Points
20 days ago
Mixtures are formed when two or more substances mix together without participating in a chemical change. In a homogeneous mixture, the components mixed are uniformly distributed but in case of heterogeneous mixture, the components are completely mixed and all the particles can be seen under a microscope. Complete step by step answer: In a mixture, the substances need not necessarily mix in a definite ratio. Some examples of mixture include sand and water, mixtures of sugar and salt etc. Further, there are two types of mixtures -Homogeneous mixture -Heterogeneous mixture In case of homogeneous mixtures, the particles are distributed uniformly and we can’t just judge a homogeneous mixture by just seeing it. Example: rainwater, vinegar etc. Now, in case of heterogeneous mixtures, the particles are distributed non-uniformly and we can easily judge a heterogeneous mixture by just seeing it. Now, in the given question, both assertion and reason are correct and reason is the correct explanation for assertion. This is because sea water can be classified as both homogeneous and heterogeneous mixture. It is called as homogeneous because it contains dissolved salts in it and it may be also called as heterogeneous as it contains various insoluble components too as sand, microbes etc. Hence, option A is correct. Note: Blood is a heterogeneous mixture because the blood cells are physically separated from the blood plasma. The cells have different properties than the plasma. These cells can be separated from plasma by centrifuging, which is observed as a physical change.

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