UNIT 1 TEST PART 2
Multiple Choice : Choose the one answer that most correctly answers the question or solves the problem.
1.) Which one of the following compounds would NOT be classified as an acid?
a) HCl b) H3PO4 c) H2SO4 d) C6H12O6
2.) On the pH Scale of Acids and Bases, a substance with which of the following pH would be considered a base?
a) 10 b) 7 c) 6 d) 3
3.) Which of the following heavy metals may have given rise to the term “Mad as a Hatter”?
a) Fe b) Pb c) Hg d) Cd
4.) Which of the following heavy metals is found in tobacco smoke?
a) Fe b) Pb c) Hg d) Cd
5.) The Tyndall effect is exhibited by what type of mixture :
a) Solution b) Suspension c) Colloid d) Solvent
6.) After performing a distillation on an impure water sample, which of the following substances would you expect to find in the resulting distilled sample?
a) NaCl (salt) b) Pb (lead)
c) C2H5OH (alcohol) d) CO2 (carbon dioxide)
7.) Distillation is not used by many water treatment plants to purify water. Why not?
a) It is too expensive
b) It fails to remove heavy metal contamination
c) It eventually alters the molecular structure of water
d) It gives off too much thermal energy
8.) The correct formula for an ionic compound composed of Mg+2 ions and Cl- ions is :
a) Mg2Cl b) MgCl2 c) Mg2Cl2 d) MgCl
9) Choose the correct name for the ionic compound KBr :
a) Potassium bromine b) Potassium boron
c) Potassium bromide d) Calcium bromine
Use the equation below to answer questions 10 – 12 :
N2 + 3H2 2NH3
10) How many Hydrogen atoms are on the reactant side of the equation?
a) 2 b) 3 c) 6 d) 1
11) How many Ammonia molecules are on the product side of the equation?
a) 2 b) 3 c) 6 d) 1
12) How many Nitrogen molecules are present on the reactant side of the equation?
a) 2 b) 3 c) 6 d) 1
13) A mixture of sugar water contains 13g of sugar in 100g of solution. What would the concentration of this solution be expressed as in ppt?
a) 13 ppt b) 0.13 ppt c) 130 ppt d) 7.7 ppt
14) A mixture of salt water contains 2g of salt in 1000g of solution. What would the concentration be expressed as in ppm?
a) 2000 ppm b) 20 ppm c) 0.2 ppm d) 2 ppm
15) Which of the following best represents an ion?
a) Ca b) CaO c) Ca+2 d) none of these
Use the solubility curve provided for KNO3 to answer questions 16-19
16) What would be the maximum number of grams of KNO3 that could be dissolved in 100g of river water when the temperature of the water is 20° C?
a) 13 g b) 21 g c) 32 g d) 46 g
17) At what minimum temperature would you be able to dissolve 60g of KNO3 in 100 g of water?
a) 10° C b) 40° C c) 25° C d) 5° C
18) The point labeled A on the graph would be a state of :
a) Saturation b) Unsaturation c) Supersaturation d) Megasaturation
19) The point labeled B on the graph would be a state of :
a) Saturation b) Unsaturation c) Supersaturation d) Megasaturation
For questions 20 – 22 ,identify each mixture as:
a) Solution b) Colloid c) Suspension
20) Italian salad dressing
21) Milk
22) A cola soft drink