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10
×
Which indicator is blue in an alkaline solution and colorless in acid?
Methyl orange
Phenolphthalein
Universal indicator
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10
×
What is the ionic equation for neutralization?
Na⁺ + OH⁻ → NaOH
HCl + NaOH → NaCl + H₂O
H⁺ + OH⁻ → H₂O
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10
×
What is the role of an acid in a titration experiment?
To neutralize the alkali
To act as a catalyst
To form an insoluble salt
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10
×
Which of the following is an example of an acidic oxide?
CO₂
Na₂O
CaO
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10
×
What happens to the hydrogen ions when an acid is neutralized?
They turn into oxygen gas
They evaporate
They react with hydroxide ions to form water
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10
×
What type of chemical equation shows only the reacting ions in a solution?
Balanced equation
Structural equation
Ionic equation
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10
×
What is the correct balanced equation for the reaction between hydrochloric acid and sodium hydroxide?
HCl + NaOH → NaCl + H₂O
HCl + NaOH → NaOH + H₂
HCl + NaOH → Na + Cl₂ + H₂O
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eraser
Reset score!
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gold
Win 50 points!
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shark
Other team loses 20 points!
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baam
Lose 20 points!
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seesaw
Swap points!
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shark
Other team loses 25 points!
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rocket
Go to first place!
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baam
Lose 20 points!
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10
×
What happens when ammonia gas dissolves in water?
It forms a neutral solution
It forms an alkaline solution
It forms an acidic solution
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baam
Lose 10 points!
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rocket
Go to first place!
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shark
Other team loses 10 points!
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thief
Give points!
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25
10
×
Which of the following is an example of a strong acid?
Ethanoic acid
Ammonia
Hydrochloric acid
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10
×
How can an insoluble salt be prepared?
Precipitation
Evaporation
Filtration of a solution
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heart
Other team wins 10 points!
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gift
Win 10 points!
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fairy
Take points!
5
10
15
20
25
×
lifesaver
Give 15 points!
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10
×
What is the formula of the salt formed when sulfuric acid reacts with potassium hydroxide?
KNO₃
KCl
K₂SO₄
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10
×
Which gas is produced when an acid reacts with a metal carbonate?
Carbon dioxide
Oxygen
Hydrogen
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