
Exploring Chemical Reactions and Acids

Quiz
•
Others
•
10th Grade
•
Easy
Muzamil Ahmed
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the law of conservation of mass?
Mass can be created in chemical reactions.
Mass is conserved in chemical reactions; it cannot be created or destroyed.
Mass is only conserved in physical changes.
Mass can be destroyed during a reaction.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define a chemical reaction and provide an example.
Dissolving salt in water: NaCl -> Na+ + Cl-
Rusting of iron: 4 Fe + 3 O2 -> 2 Fe2O3
Photosynthesis: 6 CO2 + 6 H2O -> C6H12O6 + 6 O2
An example of a chemical reaction is the combustion of methane: CH4 + 2 O2 -> CO2 + 2 H2O.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the signs that a chemical reaction has occurred?
No visible changes in the mixture
Change in the state of matter without heat
Signs of a chemical reaction include gas formation, color change, temperature change, precipitate formation, and odor change.
Formation of a solid without a reaction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between exothermic and endothermic reactions.
Both exothermic and endothermic reactions release energy.
Exothermic reactions occur only in gases; endothermic reactions occur only in liquids.
Exothermic reactions absorb energy; endothermic reactions release energy.
Exothermic reactions release energy; endothermic reactions absorb energy.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is pH, and how is it measured?
pH indicates the concentration of oxygen in water, measured with oxygen meters.
pH is a measure of temperature, measured with thermometers.
pH is a measure of pressure, measured with barometers.
pH is a measure of acidity/alkalinity, measured with pH meters or indicator strips.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the properties of acids and bases.
Bases donate protons and have a sour taste.
Acids and bases are both neutral and tasteless.
Acids donate protons and have a sour taste; bases accept protons and have a bitter taste.
Acids are slippery and have a sweet taste.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the neutralization reaction? Give an example.
An example of a neutralization reaction is the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH), which produces water (H2O) and sodium chloride (NaCl).
The reaction between hydrogen peroxide and baking soda.
The reaction between potassium chloride and water.
The reaction between vinegar and oil.
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