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The amino-acids are colourless crystalline compounds which are generally soluble in water but sparingly soluble in organic solvants; mort melt with decomposition, but Gross et al.(1955) have shown that sublimation is possible with a number of amino-acids.

When people ask me why they should understand basic chemistry concepts,one of this reasons i give them is so they can make wise nutritional choices & can cook food that is tasty & healthy,

Since electrons possess spin,they behave as spinning magnets and so will tend to orient themselves in an applied magnetic field. The spin of one election of a covalant pair and its interaction with a magnetic field is cancelled by the equal and opposite spine of its partner.An unpaired electron,however, will have an interaction that is not cancelled out.If a molecule contains only one unpaired electron, then the spin number can be either +1/2 -1/2. Thus there are only two orintations possible,