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Problem Set: Mixtures Video Lecture | Quantitative for GMAT

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FAQs on Problem Set: Mixtures Video Lecture - Quantitative for GMAT

1. What are mixtures and how are they different from pure substances?
Ans. Mixtures are a combination of two or more substances that are physically mixed together. They can be separated into their individual components through physical means. On the other hand, pure substances are made up of only one type of atom or molecule and cannot be separated into other substances by physical means.
2. Can mixtures have varying compositions?
Ans. Yes, mixtures can have varying compositions. The proportion of each substance in a mixture can vary, leading to different compositions. For example, a mixture of salt and water can have different concentrations of salt depending on the amount of salt dissolved in the water.
3. How can mixtures be separated?
Ans. Mixtures can be separated through various physical methods such as filtration, distillation, evaporation, and chromatography. These methods take advantage of the different physical properties of the substances in the mixture, such as differences in solubility, boiling point, or particle size.
4. What are homogeneous and heterogeneous mixtures?
Ans. Homogeneous mixtures are uniform throughout and have the same composition and properties in all parts of the mixture. Examples include sugar dissolved in water or air. Heterogeneous mixtures, on the other hand, have uneven distribution and different properties in different parts of the mixture. Examples include a salad with various ingredients or a mixture of oil and water.
5. Can mixtures be classified based on their state of matter?
Ans. Yes, mixtures can be classified based on their state of matter. They can be solid mixtures (such as a mixture of sand and salt), liquid mixtures (such as a mixture of oil and water), or gaseous mixtures (such as air, which is a mixture of gases).
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