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Tests of unsaturation - Bromine - carbon tetrachloride test The compound is liquefying in carbon tetrachloride or chloroform and after that a few drops of 5% bromine solution i
Tests of benzaldehyde - aldehydes and ketones (a) It forms a white precipitate with solution. (b) It creates a yellow precipitate with 2: 4 dinitrophenyl hydrazines. (
When an electron revolves in a stationary orbit then: (1) It absorbs energy (2) It emits radiation (3) Its energy remains constant (4 )It gains kinetic energy Ans:
Substitution reactions Replacement of a molecule or set/group of the substrate by any another type of atom or group is termed as substitution reactions. Examples :
Q. Explain about Preparation of diborane? Diborane can be prepared in almost quantitative yields by the reduction of boron Tricloride etherate (BF 3 , 0Et 2 ) with lithium alum
The covalent bond produced by the unequal sharing of electrons among the two atoms is known as polar covalent bond.
The amount of energy released when one mole of bonds are formed among the corresponding gaseous atoms is known as Bond energy.
Safety in Preparation of Preparation of trimethyl: 1 Use a round-bottomed flask equipped with a Claisen head (lagged with glass-wool), Quickfit thermometer (very expensive!)
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diagonal relationship and anomalous behaviour of the each element of the periodic table
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