Chemistry Notes 24X7

Melting point :   Melting point is the temperature at which a solid becomes a liquid at normal atmospheric pressure. Boiling point :   Temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and liquid change to vapor.

Saturated solutions is the chemical solution containing the maximum concentration of a solute dissolved in the solvent. The additional solute will not dissolve in a saturated solution. Ex :- Sugar solution.

Colloidal solutions, or colloidal suspensions, are nothing but a mixture in which the substances are regularly suspended in a fluid. A colloid is a very tiny and small material that is spread out uniformly all through another substance.  What do you mean by Colloids?   Colloids are mixtures in which microscopically dispersed insoluble particles of one substance are suspended in another substance. The size of the suspended particles in a colloid can range from 1 to 1000 nanometres (10-9 metres).

A Chemical Reaction is a process that occurs when two or more molecules interact to form a new product(s). Compounds that interact to produce new compounds are called reactants whereas the newly formed compounds are called products.

 'Tyndall effect, also called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles.' Ex - Smoke or Dust in a room, which makes visible a light beam entering a window.  Short-wavelength blue light is scattered more strongly than long-wavelength red light. The Tyndall effect occurs from particles roughly the same size as the wavelength of light. The effect is named for the 19th-century British physicist John Tyndall, who first studied it extensively.                                            or 'The scattering of light by particles in its path is called Tyndall effect.' When a beam of light enters a smoke-filled dark room through a small hole, then its path becomes visible to us. The tiny dust particles present in the air of room scatter the beam of light all around the room. Thus, scattering of light makes the particles visible. Tyndall effect can also be observed when sunlight passes through a canopy of a dense forest. Here

Answer : The difference between saturated and unsaturated fat lies in the number of double bonds in the fatty acid chain. Saturated fatty acids lack double bonds between the individual carbon atoms, while in unsaturated fatty acids there is at least one double bond in the fatty acid chain.

Answer : Adding a spoonful of sugar to a cup of hot coffee produces an unsaturated sugar solution. Vinegar is an unsaturated solution of acetic acid in water. Mist is an unsaturated (but close to saturated) solution of water vapor in air.

Answer : A soda is a saturated solution of carbon dioxide in water. This is why, when the pressure is released, carbon dioxide gas forms bubbles. Adding chocolate powder to milk so that it stops dissolving forms a saturated solution.

The term matter refers to anything that occupies space and has mass. it is made up of tiny particles called atoms. There are three states of matter.  Solid Liquid Gas For example pen, pencil, toothbrush, water, milk are matters as well as car, bus, bicycle is also a matter. So matter is considered as a living thing and a non-living thing.