REUGLAR QUIZZES - REGULAR TOPIC 2 Energy & Matter SET B
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QUESTION 1. What is always true of a compounds' composition?

(A) It varies
(B) It can be homogeneous or heterogeneous
(C) It is fixed
(D) It can change from one sample to the next
(E) None of the above

QUESTION 2. All Pure Substances are either?

(A) Elements or mixtures
(B) Compounds or mixtures
(C) Elements or compounds
(D) Elements or compounds or mixtures
(E) Only mixtures

QUESTION 3. Which of the following pairs are incorrectly matched?

(A) Pure sulfur - Element
(B) Kool-Aid - Homogeneous mixture
(C) Pure water - Compound
(D) Diet Coke - Compound
(E) Pure silver - Element

QUESTION 4. How might a chemical change be recognized?

(A) Melting
(B) Freezing
(C) A mixture changing composition
(D) A heterogeneous mixture becoming a homogeneous mixture
(E) The formation of new compounds or elements

QUESTION 5. When separating the componenets of a mixture using distillation, what physical property of the two components must be significantly different?

(A) Color
(B) Density
(C) Mass
(D) Freezing point
(E) Boiling point




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