Ques:Q: What is rusting an example of? Choices: - radiation change - Decomposition - contamination change - chemical change A:

Ans:chemical change
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Ques:Q: What is the basic chemical building block of matter; it is the simplest chemical substance? Choices: - atoms - helium - hydrogen - element A:

Ans:element
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Ques:Q: What word do get from the arabic al-qili, meaning "ashes of the saltwort plant from salt marshes"? Choices: - water - metals - crystals - alkali A:

Ans:alkali
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Ques:Q: What is the apparatus used for carrying out an electrolysis reaction called? Choices: - fluorescent cell - biochemical cell - reversible cell - electrolytic cell A:

Ans:
electrolytic cell
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