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10
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What is the color change of methyl orange in acid and alkali?
Blue in acid, red in alkali
Red in acid, yellow in alkali
Yellow in acid, blue in alkali
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10
×
Which indicator is used in titrations involving a strong acid and a strong base?
Universal indicator
Thymolphthalein
Phenolphthalein
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10
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Which acid is used in making fertilizers like ammonium nitrate?
Nitric acid
Ethanoic acid
Hydrochloric acid
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10
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Which of the following is an example of an amphoteric oxide?
Simple distillation
Fractional distillation
Filtration, crystallization
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10
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Which indicator is blue in an alkaline solution and colorless in acid?
Methyl orange
Universal indicator
Phenolphthalein
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10
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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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10
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What is the formula of the salt formed when sulfuric acid reacts with potassium hydroxide?
KNO₃
K₂SO₄
KCl
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10
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What type of reaction occurs when an acid reacts with a base?
Decomposition
Oxidation
Neutralization
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10
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Which of the following salts is soluble in water?
Silver chloride
Sodium nitrate
Barium sulfate
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10
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What type of oxide is formed when a metal reacts with oxygen?
Basic oxide
Amphoteric oxide
Acidic oxide
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gift
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10
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What is the ionic equation for neutralization?
HCl + NaOH → NaCl + H₂O
H⁺ + OH⁻ → H₂O
Na⁺ + OH⁻ → NaOH
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10
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What happens to the hydrogen ions when an acid is neutralized?
They turn into oxygen gas
They react with hydroxide ions to form water
They evaporate
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