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Q1 · Chemistry · EASY
Which of the following is an example of a chemical change?
Q2 · Chemistry · MEDIUM
The pH value of lemon juice is approximately 2.2. What is the nature of lemon juice?
Q3 · Chemistry · MEDIUM
In the reaction: 2KClO3 → 2KCl + 3O2, what type of chemical reaction is this?
Q4 · Chemistry · EASY
Which gas is produced when dilute hydrochloric acid reacts with zinc metal?
Q5 · Chemistry · MEDIUM
The pH value of a neutral solution at 25°C is: