Which of the following materials fall in the | vedclass

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(A) pure substance consists of particles of only one type of chemical nature. Elements and compounds are considered pure substances.$CaO$ (Calcium oxi

Vedclass · Accepted Answer

$CaO, CO_2$ and $NaCl$

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(A) pure substance consists of particles of only one type of chemical nature. Elements and compounds are considered pure substances.$CaO$ (Calcium oxide), $CO_2$ (Carbon dioxide), and $NaCl$ (Sodium chloride) are all chemical compounds with fixed compositions.Brick is a mixture of various materials, mercury is an element (pure), but wood is a complex mixture.Iron is an element (pure), $CaO$ is a compound (pure), but air is a mixture of gases.Ice is pure water $(H_2O)$, but milk is a colloid (mixture of water, fats, proteins, etc.).Therefore, the group containing only pure substances is $CaO, CO_2$ and $NaCl$.

Which of the following materials fall in the category of a "pure substance"?

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