44. List five characteristics by which compounds can be distinguished from mixtures.
45. Explain why, a solution of salt in water is considered a mixture and not a compound.
Answers
Key Differences Compound and Mixture
The difference between compound and mixture can be drawn clearly on the following grounds:
The compound is used to mean a substance, created by combining two or more than two substances chemically in a certain ratio by weight. The mixture is described as a substance formed as a result of intermingling two or more substances into one, physically.
Compounds are always homogeneous, whereas mixtures can be homogeneous or heterogeneous.
In a compound, the ingredients are present in a definite proportion. On the contrary, the constituents are present in a variable proportion in a mixture.
The compound is a pure substance, which contains only one kind of molecule. As against this, a mixture is an impure substance which contains various types of molecules.
The properties of a compound are identical to the properties of its ingredients. Unlike mixture, wherein the properties of ingredients and the mixture are same.
The compound, results in the making of the new substance, while mixture does not lead to the creation of new substance.
The constituents of a compound can be separated only by chemical or electro-chemical reactions. Conversely, the components of the mixture can be bifurcated by physical methods.
Compounds are boiled or melted at a definite temperature. On the other hand, mixtures, do not have a fixed melting and boiling point.
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Answer: Hey mate here is your answer
Explanation:
44)
Compounds:
It is a pure substance
It cannot be seperated by physical method
Elements loose their properties in compounds
Its composition is fixed
It has fixed melting point
MIXTURES:
It is a impure substance
Cant be seperated by physical method
Substances forming mixture retain their properties
It has no fixed composition
It has no sharp melting point
45)
Ans: A solution of Salt in water considered as a mixture but not as a compound. Because when salt is dissolved in water it does not undergoing any chemical change but only dissociating into its ions.
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