Which of the following is an element? (a)Nitrogen dioxide gas (b)sulphur dioxide gas (c)Oxygen gas (d)Carbon dioxide gas
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Answer:
oxygen
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Element from given options is -
C) Oxygen gas
Element are substances comprising of only one type of atom. Since oxygen gas contains only oxygen atom, hence it is an element.
Other options are compounds, as they comprise of two or more than two types of elements. Nitrogen dioxide gas contains nitrogen and oxygen. Sulphur dioxide contains sulphur and oxygen. Carbon dioxide contains carbon and oxygen.
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