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Question of the Day: TOEIC

Water was long regarded as an element. In 1781 Cavendish showed that it is formed by the union of hydrogen and oxygen. Being a believer in the phlogiston theory, however, he failed to interpret his results correctly. A few years later Lavoisier repeated Cavendish's experiments and showed that water must be regarded as a compound of hydrogen and oxygen.

Adapted from An Elementary Study of Chemistry by William McPherson, Ph.D. and William Edwards Henderson, Ph.D (1905)

According to the passage, what are the ingredients of water?

Oxygen

Hydrogen

Phlogiston

Hydrogen and oxygen

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