$(a)$ State the difference between a pure substance and a mixture. Give one example of each.
$(b)$ Identify homogeneous mixtures from the following:
$(i)$ Smoke
$(ii)$ Brass
$(iii)$ Tincture of iodine
$(iv)$ Milk
$(b)$ Identify homogeneous mixtures from the following:
$(i)$ Smoke
$(ii)$ Brass
$(iii)$ Tincture of iodine
$(iv)$ Milk
$(II, III)$ Pure substance consists of particles of only one kind of matter. These can be elements or compounds; for example, $Gold$ or $Water$. $A$ mixture is obtained by mixing two or more different elements or compounds which do not react chemically; for example, $Salt$ solution in water.
$(b)$ The homogeneous mixtures are:
$(ii)$ $Brass$ (an alloy of copper and zinc).
$(iii)$ $Tincture$ of iodine (a solution of iodine in alcohol).
$(b)$ The homogeneous mixtures are:
$(ii)$ $Brass$ (an alloy of copper and zinc).
$(iii)$ $Tincture$ of iodine (a solution of iodine in alcohol).
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Similar Questions
Two substances,$A$ and $B$,were made to react to form a third substance,$A_2B$,according to the following reaction: $2A + B \to A_2B$. Which of the following statements concerning this reaction are incorrect?
$(i)$ The product $A_2B$ shows the properties of substances $A$ and $B$.
$(ii)$ The product will always have a fixed composition.
$(iii)$ The product so formed cannot be classified as a compound.
$(iv)$ The product so formed is an element.
$(i)$ The product $A_2B$ shows the properties of substances $A$ and $B$.
$(ii)$ The product will always have a fixed composition.
$(iii)$ The product so formed cannot be classified as a compound.
$(iv)$ The product so formed is an element.
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