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Questions and Answers
What concentration of fluoride ions in water prevents tooth decay?
What concentration of fluoride ions in water prevents tooth decay?
- 3 ppm
- 1 ppm (correct)
- 1.5 ppm
- 2 ppm
Which of the following is an example of a mixture?
Which of the following is an example of a mixture?
- Oxygen
- Water
- Salt
- Brass (correct)
Which substance is commonly used in rat poison?
Which substance is commonly used in rat poison?
- Sodium fluoride (correct)
- Nickel
- Copper
- Zinc
What type of solutions will be mostly considered in this unit?
What type of solutions will be mostly considered in this unit?
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What properties of solutions will be studied after their formation?
What properties of solutions will be studied after their formation?
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