1. Analyze the diagram on the left, what evidence
shows that the reaction's product is a gas?
a. bubbles are forming and collected
b. the gas is not soluble in water
C. acids always produce gases when theyreact with a solid
d.
there is no filter funnel and paper to remove unreacted solid.
2-3 Refer to the illustration below:
Solo
The following depicts the formation of methanol (CH3OH).
carbon + hydrogen gas + oxygen gas — methanol
+
-
2. What would be the skeleton equation for this reaction?
a. C + Cl2 + O2 - CH3CIH
b. C + H2 + 02 - CH3OH
c. C2 + H2 + 02 - CH3OH
d. C + H + O - CH3OH
3. If the formula for methanol is CH3OH, what would be the balancedchemical
equation for this reaction?
a. C3 + 2H2 + O2 2CH3OH
b. 2C + 4H2 + O2 + 2CH3OH
c. 2C + 2H2 + O2 → 2CH3OH
d. C + H + O CH3OH
4. Which of the following is the correct balanced reaction?
a. 2 CH+100, 6C0, +8H,0
b. C,H, +0,- C0, +H,0
C. CH +0, 300, + 2H,0
d.C.H. +50, 300, +4H,0
5. Quicklime (Cao) is used as a drying agent. When water is added to this,
slaked lime Ca(OH)2 is formed. What type of reaction is this?
a. combination
b. single displacement
b. decomposition
double displacement
6. Fresh fish and meat that are not stored in a refrigerator show signs of
spoilage in less than a day. What has caused this spoilage?
a. temperature changes
b. presence of microorganisms
C. oxygen in air
d. all the above
C.
-7. The rate of reaction increases as the temperature increases. Which of the
following statements provides the best explanation for this?
a. At lower temperatures, the particles do not collide with each other.
b. At higher temperatures, the particles have more energy, move faster, and collide
more often.
c. Higher temperature has higher activation energy.
d. Increasing the temperature increases the number of particles, so theycollide more
often.
8. Which of the following statements about collisions is correct?
a. Reaction will occur even without collision of molecules.
b. All colliding particles have the same amount of energy.
c. Only fast-moving particles collide with each other.
d. Reactions can happen if the colliding particles have enough energy.
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