The chemical name of quartz is:
Correct answer A. Silicon Dioxide
Tip: press A, B, C or D to answer, and N for the next question.
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See allThe number of electrons of a neutral atom is automatically known if one knows the?
Correct answer A. Atomic number
Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?
Correct answer B. Chlorofluorocarbons
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Phosphorus is an essential component of one of the following biological molecules:
Correct answer B. Nucleic acids
Laughing gas has chemical composition of following two elements?
Correct answer C. Nitrogen + Oxygen
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