As you know, water mixes with other compounds to form a variety of mixes. Which of the following would best describe a mix where the particles are not dissolved but will precipitate out?
a colloid
a solution
a suspension
a solute
The Correct Answer is C
A. a colloid: A colloid has larger particles than a solution, but they do not settle out (e.g., milk).
B. a solution: In a solution, particles are completely dissolved and remain evenly distributed (e.g., salt water).
C. a suspension: In a suspension, particles are large, do not dissolve, and will settle out over time (e.g., muddy water).
D. a solute: A solute is a substance dissolved in a solvent-not a type of mixture.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. homozygous recessive: That would be written as ww - both alleles being recessive.
B. homozygous dominant: WW means both alleles are dominant-this is homozygous dominant.
C. heterozygous dominant: That would be Ww-one dominant and one recessive allele.
D. heterozygous recessive: There is no such term; heterozygous always means one dominant and one recessive.
Correct Answer is C
Explanation
A. it is a base and the hydrogen ion concentration increased: A base decreases H⁺ concentration by accepting H⁺ or releasing OH⁻.
B. it is an acid and the hydrogen ion concentration decreased: Acids increase H⁺ concentration, and a pH of 9.4 is basic, not acidic.
C. it is a base and the hydrogen ion concentration decreased: A pH of 9.4 is above 7, indicating a basic solution, and bases lower H⁺ concentration.
D. it is a buffer and the hydrogen ion concentration increased: A buffer resists changes in pH; it doesn't make pH jump to 9.4. Also, H⁺ would not increase in a basic environment.
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