The category “Is Matter Around Us Pure?” delves into the fundamental concepts of purity in substances and materials that constitute our environment. It explores the distinction between pure substances and mixtures, examining their properties and significance in everyday life. Topics under this category include the classification of matter, methods for separating mixtures, and the importance of purity in various scientific fields like chemistry and biology. This exploration fosters a greater understanding of how matter is structured and interacts in both natural and artificial contexts, highlighting the relevance of purity in our daily experiences.
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[q] What is the definition of a pure substance?
A) A substance made of only one type of particle
B) A substance that cannot be broken down
C) A mixture of two or more substances
D) A substance that is always solid
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[a] A substance made of only one type of particle [q] Which of the following is an example of a heterogeneous mixture?
A) Saltwater
B) Air
C) Vegetable soup
D) Sugar [a] Vegetable soup [q] What is the main component of air?
A) Oxygen
B) Carbon Dioxide
C) Nitrogen
D) Hydrogen [a] Nitrogen [q] Which method can be used to separate a solid from a liquid?
A) Sublimation
B) Filtration
C) Evaporation
D) Distillation [a] Filtration [q] Which of the following is a characteristic of a solution?
A) It has a uniform composition
B) It always contains water
C) It can be separated by filtration
D) It can be colored and turbid [a] {answer_51]} [q] What type of mixture is composed of visibly different substances?
A) Homogeneous mixture
B) Pure substance
C) Heterogeneous mixture
D) Compound [a] Heterogeneous mixture [q] Which of the following is a property of a pure substance?
A) It can vary in composition
B) It has consistent properties
C) It is always liquid
D) It can dissolve in water [a] It has consistent properties [q] Which of these is considered a colloid?
A) Sand in water
B) Sugar in water
C) Milk
D) Saltwater [a] Milk [q] What kind of mixture is steel?
A) Element
B) Compound
C) Homogeneous mixture
D) Heterogeneous mixture [a] Homogeneous mixture [q] Which process involves heating a solution to form vapor and then cooling the vapor to obtain a solid?
A) Filtration
B) Evaporation
C) Distillation
D) Centrifugation [a] Distillation [x]Click here to explore more flashcards: Chemistry Flashcards [restart] [/qdeck]
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