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Analytical tests of glycerol - Acrolein and Dunstan test
(a) Acrolein test: while glycerol is heated with an extremely offensive smell is generated due to formation of acrolein. Its aqueous solvent restores the colour of schiff's reagent and decreases Fehling solution and Tollen's reagent.
(b) Dunstan's test: A drop of phenolphthalein is added almost 5 ml of borax solution. The pink in colour seems on adding 2-3 drops of glycerol, pink colour goes. The pink colour emerges out on heating and disappears on cooling again.
Volume of diatomic gas is less than the monatomic gas , although diatomic gas has 2 moles ( 2 times atomes) than monoatomic gas ?? Ans) The answer is derived by avogadros law
explain why boiling and meliting points of nitroalkanes than that of iosmeric alkyl nitrites
simple method of synthesis of the above chemical with highest yield.
Uses of Perfluorocarbons Perfluorocarbons are good electrical insulators. These have several important uses like: (a) Perfluorocarbons are used as surface coatings, lubrican
a small 0.600ml bubble forms at the bottom of a lake where the temperature is 4.0 degrees Celsius and the pressure is 2.40 atm. What volume will the bubble occupy near the surface
Physical properties of Cycloalkane (i) In Cycloalkane First two members are gases, next three members are liquids and higher ones are solids. (ii) Cycloalkane is not solubl
The number of electrons in [ 40 19 k ] -1 is: (1) 19 (2) 20 (3)18 (4)40 Ans: 40
A tank contains 50 gal of a solution of NaCl in water (20% wt). To wash the tank, we supply fresh water at 10 gal/min and drain the tank at the constant rate of 10 gal/min. Determi
240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample
4. (a) Explain the concept of (i) intrinsic, (ii) n-type, and (iii) p-type semiconductors with the aid of bond diagrams and band diagrams. (b) What is a hole? Using a mathematic
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