Try segregating the things around you as pure substances or mixtures.
(N/A) pure substance consists of only one type of particles,whereas a mixture consists of two or more different types of particles.
$(a)$ Wood: Mixture (It contains cellulose,lignin,water,and other organic compounds).
$(b)$ Coal: Mixture (It is a complex mixture of carbon,hydrogen,nitrogen,oxygen,and sulfur).
$(c)$ Milk: Mixture (It is a colloid containing water,fats,proteins,lactose,and minerals).
$(d)$ Sugar: Pure substance (It consists only of sucrose molecules,$C_{12}H_{22}O_{11}$).
$(a)$ Wood: Mixture (It contains cellulose,lignin,water,and other organic compounds).
$(b)$ Coal: Mixture (It is a complex mixture of carbon,hydrogen,nitrogen,oxygen,and sulfur).
$(c)$ Milk: Mixture (It is a colloid containing water,fats,proteins,lactose,and minerals).
$(d)$ Sugar: Pure substance (It consists only of sucrose molecules,$C_{12}H_{22}O_{11}$).
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Similar Questions
Pragya 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 SolutionWhat is meant by a pure substance?
Medium
View SolutionWhich of the following are chemical changes?
$(a)$ Growth of a plant
$(b)$ Rusting of iron
$(c)$ Mixing of iron filings and sand
$(d)$ Cooking of food
$(e)$ Digestion of food
$(f)$ Freezing of water
$(g)$ Burning of a candle
$(a)$ Growth of a plant
$(b)$ Rusting of iron
$(c)$ Mixing of iron filings and sand
$(d)$ Cooking of food
$(e)$ Digestion of food
$(f)$ Freezing of water
$(g)$ Burning of a candle
Easy
View SolutionList the points of differences between homogeneous and heterogeneous mixtures.
Medium
View SolutionClassify the following as chemical or physical changes:
$1$. Cutting of trees
$2$. Melting of butter in a pan
$3$. Rusting of almirah
$4$. Boiling of water to form steam
$5$. Passing of electric current through water and the water breaking down into hydrogen and oxygen gases
$6$. Dissolving common salt in water
$7$. Making a fruit salad with raw fruits
$8$. Burning of paper and wood
$1$. Cutting of trees
$2$. Melting of butter in a pan
$3$. Rusting of almirah
$4$. Boiling of water to form steam
$5$. Passing of electric current through water and the water breaking down into hydrogen and oxygen gases
$6$. Dissolving common salt in water
$7$. Making a fruit salad with raw fruits
$8$. Burning of paper and wood
Medium
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