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Reaction Rates, Indicators And Toxic Chemicals
Test Description: Test on reaction rates, indicators and toxic chemicals
Instructions: Answer all questions to get your test result.
1) Which answer below will not cause an increase in the rate of reaction?
A
A catalyst
B
An increase in the surface area.
C
An increase in temperature
D
An inhibitor
2) How many periods is in the modern periodic table?
A
7
B
5
C
6
D
4
3) If you add zinc to hydrochloric acid, bubble of hydrogen gas forms. What will most likely increase the rate of bubble formation?
A
using less zinc.
B
using powdered zinc.
C
diluting the hydrochloric acid
D
cooling the hydrochloric acid
4) The energy needed to start a chemical reaction.
A
inhibitor energy
B
enzymes
C
reactant energy
D
activation energy
5) Which element has chemical properties most like Gallium?
A
Aluminum
B
Arsenic
C
Zinc
D
Germanium
6) Which element is most likely a good insulator?
A
Copper
B
Silicon
C
Chlorine
D
Calcium
7) Which below is not a factor that would affect the rate of reaction?
A
temperature
B
surface area
C
concentration
D
color
8) Crushing up a tablet before dissolving it in water would
A
decrease the concentration
B
decrease the surface area
C
decrease the temperatuer
D
increase the surface area
9) Why is copper used in electrical wiring?
A
Because it is a good insulator
B
Because it is a semiconductor
C
Because it is malleable and a poor conductor of electricity
D
Because it is ductile and a good conductor of electricity
10) A reaction that absorbs energy is called a(n)
A
endothermic reaction
B
reductive reaction
C
terperputic reaction
D
exothermic reaction
11) The capitol building in Atlanta, Georgia is covered in gold foil. It takes only 2.2 kilograms of gold to cover the entire top of the building. Why does it take such a small amount of gold?
A
Because gold is very reactive
B
Because gold is ductile
C
Because gold is malleable
D
Because gold has a low density
12) Which element below is the most reactive?
A
Tungsten
B
Potassium
C
Mercury
D
Silver
13) How many energy levels are in Bromine?
A
5
B
2
C
4
D
3
14) What elements are most useful for semiconductors in computers?
A
All elements can be use as semiconductors
B
metals
C
metalloids
D
non-metals
15) A reaction that releases energy is called a(n)
A
reductive reaction
B
endothermic reaction
C
temperputic reaction
D
exothermic reaction
16) If I add vinegar to baking soda, a chemical reaction takes place and carbon dioxide is produced. Which of the following will increase the speed of the chemical reaction?
A
use an inhibitor
B
decrease the surface area of the baking soda
C
decrease the concentration of the vinegar
D
increase the temperature of the vinegar
17) Who developed the first periodic table?
A
Demetri Mendeleev
B
Mr. Groce
C
Mrs. Vaughn
D
Mrs. Lopez
18) In the modern periodic table, the elements are arranged by
A
decreasing number of valence electrons
B
decreasing atomic mass
C
increasing atomic number
D
increasing atomic mass
19) The elements in a vertical column are called
A
families
B
periods
C
stalks
D
rows
20) A material that can be hammered into shapes or rolled into flat sheets is called
A
malleable
B
corrosive
C
reactive
D
ductile
*select an answer for all questions
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