IS MATTER AROUND US PURE?

The lead in the pencil we use is made of a material called graphite, graphite is a mixture of……………..

Pure water is a compound. It contains 11.19% by mass of hydrogen and oxygen ………….. by mass

Coines are mixtures of solid. Smoke is a mixture of ……………….

Some pairs of items are given below. Could you identify the incorrect pair?

components of given matter can be separated by various purifiying techniques. Components of liquid air can be separated by adopting ……………. Physical method.

………….. have no definite volume.

……………. Cannot be broken down chemically.

……………. Is a pure substance.

An example for solid in gas

Amalgam is…………

Air is ……………

Lead in pencil is made of ………………

Water is………..

Air contains …………… % of Nitrogen.

An example for homogeneous mixture.

Immiscible liquids can be separated by

Boiling point of Benzene is……….

An example for sublimation

A mixture of common salt and camphor can be separated by

Miscible liquids can be separated by…………..

The process used to separate two or more dissolved solids.

The entire world around us is made up of

The purity of a substance is determined by measuring its……………

In water Hydrogen and Oxygen are combined in the ration of …………… by volume.

Inhaled air contains …………….% of carbondioxide

The ratio of hydrogen: oxygen by mass is

matter that has a definite volume but does not have a definite shape.

State of matter that does not have a definite volume for a given mass.

State of matter with minimum space between molecules.

state of matter in which liquids change on heating

Liquids expand more than gases on heating.

Gases cannot be compressed easily with a little pressure.

Solids have no definite shape.

Liquids have lower densities than gases.

Solids have very low densities.

A type of substance that cannot be broken into simple substances chemically.

The substance resulting from the chemical combination of two or more elements in fixed proportion

Two or more substances are mixed together and the substances retain the individual original properties

Mixture of two solids (metals)

The purity of a substances is often determined by measuring its _______ properties.

Water is a colourless, odourless and tasteless liquid which boils at ______ at atmospheric pressure and freezes at ______and has a density of _____. So water is pure substance and is classified as a compound.    

Match the following

1. Small units of an element       a) compound
2. Clusters of 2 or 3 atoms         b) atoms
3. Hydrogen                                c) mixture
4. Iron Sulphite                         d) molecules
5. The lead of the pencil          e) element

Match the following Types of matter              Examples

1. Element                          a)Air
2. compound                     b) Sodium
3. Homogenous                   c) Juice with ice cubes
4. Heterogeneous                     d) water

Match the following

• Types of matter              Examples

1. Solid in solid             a) Charcoal with adsorbed gas
2. Solid in liquid             b) smoke
3. Solid in gas                  c) coin
4. Gas in solid                 d) sea water

Match the following

• Types of matter              Examples

1. Liquid in solid           a) Alcohol and water
2. Liquid in liquid            b) Soda
3. Liquid in gas            c) Amalgam
4. Gas in liquid             d) Cloud

Match the following

•      Inhaled Air                                    Examples

1. Nitrogen                      a) 20%
2. Oxygen                     b) very little
3. Carbon dioxide        c) 78%
4. Moisture                  d) 0.03%

Match the following

• Gases in air                                 Examples

1. Nitrogen                  a) Negligible
2. Oxygen                    b) 1%
3. Argon                      c) 75.50%
4. Helium                    d) 23.20%

Match the following

• Process of separation               Examples

1. Chromatography                 a) Volatile and non-volatile solids
2. Separating Funnel               b) dissolved solids
3. Sublimation                             c) miscible liquids
4. Fractional Distillation         d) immiscible liquids

Zinc amalgam (Zinc + Mercury) ……………………

Seawater…………………..

Soda drinks…………….

Air…………………….

Carbon particles in air (smoke)………………

Brass (Cu + Zinc an alloy) ………………..

Alcohol + Water ………………..

Solid – Solid Homogeneous mixture …………………..

Liquid – Liquid Homogeneous mixture ………………

Gaseous – Gaseous Homogeneous mixture ……………….

A mixture of two immiscible liquids can be separated by …………………..

A mixture of alcohol and benzene can be separated by the process of ……………….

A mixture of iodione and sand can be separated by…………………..

Percentage of nitrogen in the atmospheric air is……………….

Seawater is a mixture of ………………..

Properties of compounds are different from those of its constituent ……………

Separation of Benzene – Toluene mixture can be done by ……………………..

Seperation of two or more dissolved solids can be carried out by ……………………… which involves the distribution between a ………… phase and ……………..phase.

Water from ink ………………

lodine from the mixture of iodine and sand ………………….

Water from a mixture of Kerosene and water ……………….

Water from a mixture of a Alcohol and water …………….

Benzene from the mixture of Benzene and Toluene……………

Sand from the suspension of sand and water…………

Common salt from its solution with water ……………..

Liquids have a definite shape

Air is a pure substance

Frog is an example for gas in gas mixture.

In water the ratio of H:O by mass is 2:1

Tea is an example for heterogeneous mixture

Miscible liquids can be separated by using separation funnel.

…………….. have definite volume

Air is a ……………… mixture

Cool drinks are examples of …………. Mixture

Water is a ……………

A mixture of common salt and camphor can be separated by…………….

Spot the odd and give reason: Distillation, Decantation, Fractional Distillation, Chromatography

Spot the odd and give reason: Boiling point, density, decomposition, freezing point