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Unit 1 - Periodic Motion and Wave Mechanics

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Lesson 2 Quiz: Acids, Bases, Salts, Oxides and pH Scale

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1.
Which of the following solutions has the lowest pH value (strongest acidity) at equal concentration?
NaCl
CH3COOH
HCl
NH4OH
2.
Phenolphthalein indicator cannot distinguish between an acidic solution and a neutral solution because:
It is colorless in both
It precipitates in both
It is blue in both
It is red in both
3.
Which of the following oxides is amphoteric?
SO3
Na2O
MgO
ZnO
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