Disolved oxygen (DO) in water should be?
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✅ Correct answer: D. 4 to 5 ppm
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What is known the cold and dense air blowing down from the mountain slope during the night_____?
✅ A. Katabatic wind
The function of hemoglobin is_______?
✅ B. Transportation of oxygen
At what temperature does silver melt?
✅ C. 961.8 °C
Most of the ozone in the atmosphere is concentrated in the ________?
✅ C. Stratosphere
Periodontics deals with ________?
✅ D. Dentistry
Which of the following is a function of Vitamin A in the body?
✅ D. All of the above
Which one of the following is the softest?
✅ B. sodium
Chemical Name of Dry Ice?
✅ B. Solid Carbon Dioxide
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