A 9th grade few multiple choice questions science? please? It took me forever to type!
1. Acids are substances that
a. hydronium ions are formed when dissolved in water.
b. red litmus paper blue.
C. make foods taste bitter.
d. react with neutral liquid to form bases.
2. A substance with a pH of 13 is
a. neutral
b. strongly acid.
C. weakly basic
d. strongly basic.
3. The pH of an acid and base mixed in a solution depends on the
a. amounts of acid and base used.
b. concentration of the base alone.
C. temperature of the solution.
d. concentration of acid alone.
4. Marinades for meat commonly include acids such as vinegar or wine, because the acids can
a. toughen the meat.
b. tenderize meat.
C. preserve meat.
d. react with the salt.
5. The soap can remove grease and oil from your skin because it acts as
a. an emulsifier to surround the oil.
b. an acid to neutralize the soil.
C. a solvent to dissolve the dirt.
d. salt to make water more difficult.
6. Which of the following is a base?
a. lactose
b. lemon juice
C. Vitamin C
d. bleach
7. What is the pH of a 0.1 M solution of the strong acid HNO3 in water?
a. 1
b. 2
C. 3
d. 4
8. The salt potassium chloride, KCl can be formed by a reaction between
a. KOH and H2O.
b. KI and HCl.
C. KOH and HCl.
d. KI and NH3.
9. Which solution is more acidic?
a. a solution with a pH = 1
b. a solution with a pH = 6
C. a solution with a pH = 3
d. a solution with a pH = 1
10. What is the highest electrolyte?
a. weak base
b. strong acid
C. neutral solution
d. weak acid
Hello,
I am a minor in chemistry at the university. I'm sure most of these but there are a few that I am not sure of. I note that I am not positive about.
1)
2) D
3)
4) I'm not completely sure of it, I'd say B or C
5) I'm not sure, I'd say C
6) D
7)
8) C
9) A and D are the same answer. Make your job even if that date is the smallest number is the more acidic!
10) I'm not completely sure, I think that D
I hope this helps you a lot! Is not science fun? Haha ... Let me know if you need help!
1. a
2. d
3. a
4. b
5. a
6. d
7. a
8. c
9. There are two identical answers. either A or D
10. b
Posted on March 20, 2010.
