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Q. Show the Colorimetric analysis?
Colorimetric analysis depends on the variation of the colour with the change in concentration of the compound. Usually, absorption of light is measured at different known concentrations of a compound and a graph is plotted between the absorption and concentration. Absorption of an unknown concentration of the compound is then measured and its concentration evaluated from the graph. Thus, 1 ,lo-phenanthroline or 2.2'-bipyridyl which forms coloured complexes with iron, are often used for its determination in fruits, wines, leather and other biological materials. There are many such reagents which are fruitfully employed for the quantitative determination of various metal ions.
Show the Principles of preservation ? Various methods can be used for preservation of foods like freezing, pasteurization, sterilization, canning, dehydration, use of preserva
Why a covalent bond is directional? Covalent bond is formed as a result of pairing of two electrons in atomic orbitals of two atoms. Bond then must lie along the direction of
An unknown amount of copper, at 95 degrees C,, is placed in 100 g of water at 20 degrees C. It reaches temperature equilibrium at 60 degrees C. What is the mass of the copper?
why beryllium show simmillarity with Alumminium
How many moles of O2 are produced when 0.400 mol of KO2 reacts in this fashion? 4KO2+2CO2 ----> 2K2CO3+3O2
The shape of P -orbital is : (1) Elliptical (2) Spherical (3) Dumb-bell (4) Complex geometrical Ans: Dumb-bell
at what temperature centigrade will the volume of a gas at 0 degrees Celsius double itself pressure remaining constant
Measure the combustion energies for the burning of 1 mol of propane and butane gas in air under these conditions. Calculate the efficiency of the combustion process as a functi
properties of atom
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