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stephin reaction in hindi.
what is perkin reaction?
Upward and downward pressure are the same at any given depth Get a glass cylinder at least 15 cm long and 4 cm in diameter. Such a length of tube can be made from a straight-si
Two element have electronegativity of 1.2 and 3.0. Bond formed between them would be: (1) Ionic (2) Polar covalent ( 3) Co-ordinate (4) Metallic A ns: Ionic
Q. Illustrate Strengths of Acids and Bases? Ans. Acids and bases can be classified as strong or weak . If an acid or base is strong, it ionizes completely in water. On
In hydrogen spectrum the different lines of Lyman series are present is : (1 )UV field (2) IR field (3) Visible field (4) Far IR field Ans: UV field
Some of them show (S)-configuration at all their chiral centres. Illustrate their configurational formulae. If there is a meso-compound with this molecular formula illustrate it
Structure of Aldehydes and Ketones Carbonyl carbon atom is connected to three atoms by sigma bonds. As these bonds use Sp 2 -orbitals, they found in the same plane and are 120°
Discuss effect of impurity, temperature and alloying on the electricity conductivity of metal. For an ideal crystal with no impurities and imperfections mean free path at 0 K i
how to find stability of carbocations in benzene ring..??? and how how to find optically inactive isomers ??? (say of--C2H5Cl) how to find the weakest C-X (carbon-halogen bond in
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