Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 10 - Matter Around Us [Latest edition]

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

Among the following______ is a mixture.

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

______ is essential to perform separation by solvent extraction method.

______ has the same properties throughout the sample.

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

Oil and water are immiscible with each other.

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

A compound cannot be broken into simpler substances chemically.

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

Liquid–liquid colloids are called gel.

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

Buttermilk is an example of heterogeneous mixture.

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.

Match the following.

A ______ mixture has no distinguishable boundary between its components.

An example of a substance that sublimes is ______.

Alcohol can be separated from water by ______.

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

Chromatography is based on the principle of ______.

Diffentiate between absorption and adsorption.

Define Sublimation.

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

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

1. miscible liquids,
2. immiscible liquids

Name the components in each of the following mixtures.

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

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

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

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

How will you separate a mixture containing saw dust, naphthalene and iron filings?

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

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

Explain Tyndall effect and Brownian movement with suitable diagram. 

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