Chemistry Past Papers Questions & Answers - The Holy Grail of Chemistry

In this Powerpoint, we cover questions and answers from a variety of different past papers. The answers are given in detail.

Use this resource as a supplement in your chemistry class. These questions can be used to review particular topics, given as a formative/summative assessment, or an in class assignment.

Topics covered include:

1. Electrochemistry

2. Percetage conversions

3. Chemical equations and concentration calculations. (Yield)

4. Chemical Kinetics

5. Equilibrium reactions

6. Chemical bonding

7. Electronic configuration

8. Thermodynamics

9. Organic Chemistry

10. Column separations

11. Polymers

12. Industrial chemistry

…& so much more.

Here are some typical questions you will find:

QUESTION 6

Acid rain has a pH that is low enough to cause environmental damage.

(a) NO2 is an atmospheric pollutant that reacts with rainwater to form acid rain.

(i)(1) Write an equation for the reaction of NO2 with rainwater.

2NO2 + H2O → HNO2 + HNO3

(2) Hence, explain why the pH of acid rain is lower than that of rainwater.

•ionises completely in water

•acid has formed

•HNO3 → NO3- + H+

•[H+] increases so pH decreases

(ii) Identify another atmospheric pollutant that can contribute to the formation of acid rain.

SO2, SO3

NO

We hope you use this resource to aid your learning and teaching

Kind Regards

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