CHEMISTRY CH10 Matter Around Us Science - CHEMISTRY CH10 Matter Around Us

______ has the same properties throughout the sample.

______ is essential to perform separation by solvent extraction method.

When we mix a drop of ink in water we get a ______.

Among the following______ is a mixture.

The separation of denser particles from lighter particles done by rotation at high speed is called ______.

How is a mixture of common salt, oil and water separated? You can use a combination of different methods.

Name the components in each of the following mixtures.

1. Ice cream
2. Lemonade
3. Air 
4. Soil

Name the apparatus that you will use to separate the components of mixtures containing two,

1. miscible liquids,
2. immiscible liquids

Match the following.

1.	Element	Made up of molecules
2.	Compound	Impure substance
3.	Colloid	Settles down on standing
4.	Suspension	Pure substance
5.	Mixture	Made up of atoms

Explain Tyndall effect and Brownian movement with suitable diagram. 

Write the differences between elements and compounds and give an example for each.

How are homogenous solutions different from heterogeneous solution? Explain with examples.

Two immiscible liquids are taken in the above funnel for separation. Which is denser, X or Y? Suggest any one example for X and one for Y. A third liquid Z which is soluble only in Y is added to the mixture and contents in the funnel are shaken well. How many layers will you observe now? How will you separate the three liquids? Boiling point of X is 98°C, that of Y is 43°C and that of Z is 75°C.

Write the Classification of colloids based on physical state of dispersed phase and dispersion medium.

Diffentiate between absorption and adsorption.

Chromatography is based on the principle of ______.

In petroleum refining, the method of separation used is ______.

Alcohol can be separated from water by ______.

An example of a substance that sublimes is ______.

A ______ mixture has no distinguishable boundary between its components.

You have just won a medal made of 22-carat gold. Have you just procured a pure substance or impure substance?

Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?

Which of the following are pure substances? Ice, Milk, Iron, Hydrochloric acid, Mercury, Brick and Water.

A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?

Define Sublimation.

State whether true or false. If false, correct the statement.

Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.

• True

• False

State whether true or false. If false, correct the statement.

Buttermilk is an example of heterogeneous mixture.

• True

• False

State whether true or false. If false, correct the statement.

Liquid–liquid colloids are called gel.

• True

• False

State whether true or false. If false, correct the statement.

A compound cannot be broken into simpler substances chemically.

• True

• False

State whether true or false. If false, correct the statement.

Oil and water are immiscible with each other.

• True

• False