You can take these notes in pdf files. Best chemistry notes by best students. Download Chemical Kinetics handwritten notes are available in hindi language. Chemistry Notes for Competitive Exam:आज हम आप सभी के प्रतियोगी परीक्षाओं से सम्बंधित बहुत ही Important PDF Notes. This PDF Contains रसायन विज्ञान Chemistry Notes in Hindi || Chemistry Study Material For SSC CGL, Railway Exams || General Science.
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Photochemistry Role of Metals in Biology Pollution Prevention and Waste Minimisation B. Find out the total hardness of water in ppm units, giving temporary and permanent hardness assuming the atomic mass of Fe to be 56, that of Ca to be 40, that of Mg to be 24 and that of Na to be What are the Constituents of petroleum?
Describe the Origin of petroleum. Give an account of production of petrol from crude oil.
A producer gas has the following composition by volume. Calculate the quantity of air re-quired per m3 of gas. Give one example for each class. Write a note on the conditions leading to failure of a refractory material.
Write a note on lubricants with special reference to their classification, mode of action, examples and applications. What are the draw backs of raw rubber? How are its properties improved? Metals are one category of elements that have lustre.
They conduct heat and electricity. They are sonorous.
They are malleable and ductile 7. Non metals do not have lustre, are not sonorous and are bad conductors of heat and electricity. A compound is a pure substance composed of two or more elements. It can be broken down into simpler substances by chemical or electrochemical methods.
A mixture contains two or more elements or compounds which are mixed together in any proportion.
In a mixture no new compound is formed. A mixture shows the properties of the constituent substances Mixtures are classified are homogeneous or heterogeneous mixture Mixtures whose components mix completely with each other to make a uniform composition are called homogeneous mixtures. There are two kinds of heterogeneous mixtures. Component of a solution present in large excess is called a solvent.
A solution that has dissolved maximum amount of solute at any particular temperature is said to be a saturated solution. This constant colliding of the particles in continuous motion is called Brownian movement. Homogeneous mixture of two or more substances is called a solution. Component of a solution present in small quantity is called a solute.
Scattering of a beam of light when light is passed through a colloidal solution is called the Tyndall effect Visit www. The ability of a substance to dissolve in another substance is called solubility. The concentration of a solution is the amount of solute present in a given amount mass or volume of solvent or solution.
In a colloidal system particles are always suspended and do not settle down. These Notes Are Downloaded From www.
Colloids are mixtures with particle sizes from 1 nm to nm. The medium in which colloidal particles dispersed or suspend themselves is called dispersion medium. Solution with high solute concentration is called concentrated solution and those with low concentration is called dilute solution The component of colloid present in small amount is called dispersed w w phase.
Percentage by mass is one of the methods of expressing concentration of solution Mixtures whose components mix completely with each other to make a uniform composition are called homogeneous mixtures A heterogeneous mixture has a non — uniform composition If the amount of solute contained in a solution is less than the saturation level.
Simple distillation is used for separating liquids having a difference in. Liquids that are immiscible in each other differ in their densities and so can be separated by making use of a separating funnel. Colloids are classified according to the state solid. Colloid in which dispersed phase is either liquid or a solid and sa re na. A suspension is heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout bulk of medium.
Fractional Distillation is used for separating liquids having a difference in boiling points of less than 25 K. Visit www.
The process. Suspensions are heterogeneous mixtures with particles that have a size greater than nanometers Colloid in which dispersed medium is a liquid and dispersed phase is solid. Volatile compounds can be separated from non-volatile compound by pp er sublimation Magnetic impurities can be separated from non-magnetic impurities by magnetic separation Mixtures of two or more liquid components can be separated by simple or fractional distillation or by using a separating funnel.
Chromatography is a method of separating and identifying various components in a mixture. Chromatography is used for separation of those solutes which dissolve in same solvent Colloid in which both dispersed phase and dispersed medium are in liquid state is called as an emulsion Particles of suspension are visible to naked eye.
The change in which the shape. In a physical change no new substance is formed.