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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
An increase in temperature
B
An inhibitor
C
A catalyst
D
An increase in the surface area.
2) How many periods is in the modern periodic table?
A
4
B
5
C
7
D
6
3) If you add zinc to hydrochloric acid, bubble of hydrogen gas forms. What will most likely increase the rate of bubble formation?
A
cooling the hydrochloric acid
B
diluting the hydrochloric acid
C
using powdered zinc.
D
using less zinc.
4) The energy needed to start a chemical reaction.
A
activation energy
B
reactant energy
C
enzymes
D
inhibitor energy
5) Which element has chemical properties most like Gallium?
A
Aluminum
B
Germanium
C
Arsenic
D
Zinc
6) Which element is most likely a good insulator?
A
Silicon
B
Calcium
C
Chlorine
D
Copper
7) Which below is not a factor that would affect the rate of reaction?
A
temperature
B
concentration
C
surface area
D
color
8) Crushing up a tablet before dissolving it in water would
A
decrease the temperatuer
B
decrease the concentration
C
decrease the surface area
D
increase the surface area
9) Why is copper used in electrical wiring?
A
Because it is a semiconductor
B
Because it is ductile and a good conductor of electricity
C
Because it is a good insulator
D
Because it is malleable and a poor conductor of electricity
10) A reaction that absorbs energy is called a(n)
A
exothermic reaction
B
terperputic reaction
C
reductive reaction
D
endothermic 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 has a low density
B
Because gold is malleable
C
Because gold is ductile
D
Because gold is very reactive
12) Which element below is the most reactive?
A
Silver
B
Potassium
C
Mercury
D
Tungsten
13) How many energy levels are in Bromine?
A
2
B
4
C
3
D
5
14) What elements are most useful for semiconductors in computers?
A
non-metals
B
All elements can be use as semiconductors
C
metalloids
D
metals
15) A reaction that releases energy is called a(n)
A
reductive reaction
B
temperputic reaction
C
endothermic 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
increase the temperature of the vinegar
B
decrease the concentration of the vinegar
C
decrease the surface area of the baking soda
D
use an inhibitor
17) Who developed the first periodic table?
A
Mrs. Lopez
B
Demetri Mendeleev
C
Mr. Groce
D
Mrs. Vaughn
18) In the modern periodic table, the elements are arranged by
A
increasing atomic number
B
decreasing atomic mass
C
decreasing number of valence electrons
D
increasing atomic mass
19) The elements in a vertical column are called
A
rows
B
families
C
periods
D
stalks
20) A material that can be hammered into shapes or rolled into flat sheets is called
A
malleable
B
corrosive
C
ductile
D
reactive
*select an answer for all questions
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