Chemistry: September 2019

The process of changing a liquid into a solid by cooling is called freezing

The process of turning solid into liquid is called as fusion

The process of cooling vapour is called as condensation

The process of conversion of liquid into vapour at temperature below boiling point is called as evaporation

The pressure in which a solid is converted into gas without passing though liquid state and vice versa is called as sublimation

The heat energy required to convert 1 kg of solid at atmospheric pressure is called as Latin heat of melting

The temperature on which a liquid boys is called as boiling point

The temperature on which a solid melts into liquid is called as melting point

Kinetic energy increases

Kilogram per cubic metre

Spreading of smell of scent in air

Compressed natural gas

Liquefied Petroleum gas

Sodium carbon dioxide

The mass of unit volume of any things is called density
Density=Mass/Volume

Mixing of particles of two different substance automatically is called as diffusion

There are sufficient vacant space among particles of liquid and gas due to which these can be compressed this property is called as compression

Do substance which don't have definite shape and volume are called as gas example oxygen carbon dioxide nitrogen ammonia

Matter that don't have definite shapes are called as liquids example while milk petrol Mercury

Matter which has definite shape and volume is called as solid example wood stone iron

A substance is a type of matter which cannot be divided in other types of matter for example sugar is substance

There are three States of matter solid liquid and gas

Everything which has mass and which occupies space is called as matter Iron stone soil cloud plants and animal etc are matter or they contain matter

Sunday, September 29, 2019