Science, asked by shivamgamer32, 9 months ago

Jigyasa purchased a packet of salt and Milk on which ‘PURE’ is written. Here the word Pure

suggests that these consumables do not have any adulteration in them.

Gyan, Are they scientifically pure too?

No DiDi, scientifically a “Pure substance” means all of its constituents must

have the same chemical nature, but here it is not so. Like Milk is a mixture of

water, Fats and protein etc. which have different chemical properties.

Most of the substances/matter around us is mixtures only like Air, Soil, and

Milk etc

The substances that are

formed by simple mixing

of two or more pure

elements or compounds

where no chemical

reaction takes place are

called as Mixtures. The

components of a mixture

can be separated by

physical methods like

filtration, boiling, using a

magnet etc.

Mixture

MmMIXTURE

मिश्रण

Homogeneous Mixture:

A mixture in which the

constituents are

uniformly distributed

throughout without any

clear boundary of

separation. The

constituents are not easily

visible.eg mixture of

sugar, salt and water, Air.

Heterogeneous Mixture:

A mixture in which the

constituents are not

uniformly distributed

throughout and has visible

boundary of separation

between its constituents.

eg. sugar and sand

mixture, dirty water, salt

and iron filings mixture

Check Yourself: -

1. What do you understand by the term Mixture?

2. Write the differences between Homogeneous and Heterogeneous mixtures with

examples.

3. Categorise the following as Homogeneous and Heterogeneous mixtures:

Mixture of Chalk and soil, mixture of Wheat Flour and water, Soda Water and alloys.




upar padke answe btao or apne aap se btao help​

Answers

Answered by ninjasplayhouse
1

What is a Mixture?

A substance, on the other hand, is impure if it consists of different kinds of elements combined together physically and not chemically. Impure substances also called mixtures. Mixtures are further divided into a homogenous or heterogeneous mixture.

A homogeneous mixture occasionally called a solution, is comparatively unvarying in configuration or constant. Every unit of the mixture is like every other unit. For instance, if you liquefy sugar in water and blend it really well, your concoction is essentially the same no matter where you sample it. This mixture contains two or more chemical substances.

A heterogeneous mixture is a concoction whose configuration varies from spot to spot within the sample. For example, if you put a little amount of sugar in a vessel, add some sand, and then shake the jar a couple of times, your concoction doesn’t have the same configuration all throughout the jar. As the sand is heftier, there’s possibly more amount of sand at the bottom of the jar and more sugar at the top part. These mixtures can be identified visually and separated easily by physical means.

Characteristics And Properties Of Mixtures Or Impure Substance

It does not have any specific properties, the properties of the mixture are a result of the average properties of all the constituents.

It is formed as a result of a physical change.

They have a variable composition.

Their melting and boiling points differ.

Example Of Mixtures

Some common examples of mixtures include;

Gas and gas like nitrogen and oxygen in the atmosphere.

A solution like water and oil.

Gas and liquid such as water.

Solid and liquid such as sand and water

Answered by pravala2007
2

Answer:   Difference between Homogeneous and Heterogeneous Mixture

Homogeneous mixture: It has a non-uniform composition. There are two or more phases. It can be separated out physically. hetero means different.  Example: a mixture of sodium chloride and sand

Heterogeneous mixture

It has a uniform composition  

It has only one phase  

It can’t be separated out physically  

‘homo’ means the same  

Example: a mixture of alcohol and water  

Explanation:

Mixture: When two or more elements or compounds mix together, not necessarily in a definite ratio and do not interact chemically, then the resulting substance is known as a mixture.

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