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BECE Science 2021 Paper
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© africaexams.com
Question : 1
Total: 40
Which of the following substances is a compound?
Oxygen
Magnesium
Water
Sodium
Validate
Solution:
A compound consists of two or more different elements chemically combined in a fixed ratio. Oxygen,
magnesium and sodium are all elements but water is a compound made up of hydrogen and oxygen
(
H
2
O
)
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