What is meant by a pure substance?
(N/A) pure substance is defined as a substance that consists of only one type of particles (atoms or molecules).
For example: $Hydrogen$,$Water$,$Gold$,etc.,are considered pure substances.
Note: All elements and compounds are classified as pure substances because they have a fixed chemical composition and uniform properties throughout.
For example: $Hydrogen$,$Water$,$Gold$,etc.,are considered pure substances.
Note: All elements and compounds are classified as pure substances because they have a fixed chemical composition and uniform properties throughout.
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Similar Questions
Explain the following giving examples.
$(a)$ Colloid
$(b)$ Suspension
$(a)$ Colloid
$(b)$ Suspension
Medium
View SolutionDifferentiate between homogeneous and heterogeneous mixtures with examples.
Difficult
View SolutionPragya tested the solubility of four different substances at different temperatures and collected the data as given below (results are given in the following table,as grams of substance dissolved in $100 \,g$ of water to form a saturated solution).
Substance Dissolved $283 \,K$ $293 \,K$ $313 \,K$ $333 \,K$ $353 \,K$ Potassium nitrate $21$ $32$ $62$ $106$ $167$ Sodium chloride $36$ $36$ $36$ $37$ $37$ Potassium chloride $35$ $35$ $40$ $46$ $54$ Ammonium chloride $24$ $37$ $41$ $55$ $66$
$(a)$ Find the solubility of each salt at $293 \,K$. Which salt has the highest solubility at this temperature?
$(b)$ What is the effect of change of temperature on the solubility of a salt?
| Substance Dissolved | $283 \,K$ | $293 \,K$ | $313 \,K$ | $333 \,K$ | $353 \,K$ |
| Potassium nitrate | $21$ | $32$ | $62$ | $106$ | $167$ |
| Sodium chloride | $36$ | $36$ | $36$ | $37$ | $37$ |
| Potassium chloride | $35$ | $35$ | $40$ | $46$ | $54$ |
| Ammonium chloride | $24$ | $37$ | $41$ | $55$ | $66$ |
$(a)$ Find the solubility of each salt at $293 \,K$. Which salt has the highest solubility at this temperature?
$(b)$ What is the effect of change of temperature on the solubility of a salt?
Medium
View SolutionList the points of differences between homogeneous and heterogeneous mixtures.
Medium
View SolutionWhich of the following materials fall in the category of a 'pure substance'?
$(a)$ Ice $(b)$ Milk $(c)$ Iron $(d)$ Hydrochloric acid $(e)$ Calcium oxide
$(f)$ Mercury $(g)$ Brick $(h)$ Wood $(i)$ Air.
$(a)$ Ice $(b)$ Milk $(c)$ Iron $(d)$ Hydrochloric acid $(e)$ Calcium oxide
$(f)$ Mercury $(g)$ Brick $(h)$ Wood $(i)$ Air.
Easy
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