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Questions and Answers
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
- Melting ice
- Boiling water
- Burning wood (correct)
- Mixing salt and water
What is the atomic number of carbon?
What is the atomic number of carbon?
- 8
- 6 (correct)
- 16
- 12
Which of the following is a greenhouse gas?
Which of the following is a greenhouse gas?
- Nitrogen
- Oxygen
- Carbon dioxide (correct)
- Argon
Which of the following is true about an acid?
Which of the following is true about an acid?
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Which of the following elements is a noble gas?
Which of the following elements is a noble gas?
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Which of the following is an example of an exothermic reaction?
Which of the following is an example of an exothermic reaction?
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