Measuring rates of reaction Quiz
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5 questions, one answer each
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1. A reaction makes 48 cm³ of gas in 40 s. What is the mean rate?
- A. 0.83 cm³ s⁻¹
- B. 1.2 cm³ s⁻¹
- C. 8.0 cm³ s⁻¹
- D. 1920 cm³ s⁻¹
2. Which method is best for following a reaction that makes a cloudy precipitate?
- A. Measuring gas volume
- B. Measuring mass loss
- C. Measuring the pH
- D. Timing how long a cross takes to disappear
3. What does a steep line on a volume against time graph show?
- A. A fast rate
- B. A slow rate
- C. That the reaction has stopped
- D. That no gas is made
4. In an investigation into the effect of temperature on rate, which is the dependent variable?
- A. The temperature of the acid
- B. The mass of magnesium
- C. The volume of gas collected in 60 s
- D. The concentration of acid
5. Which is the correct unit for a rate measured as mass lost per second?
- A. g s
- B. g s⁻¹
- C. s g⁻¹
- D. g