1.

The melting points and solubility in water of amino acids are generally higher than that of the corresponding halo acids. Explain.

Answer»

amino acids exist as ZWITTER ions resulting in strong dipole-dipole attraction
amino acids are OPTICALLY active
due to HIGHER molecular mass of -`NH_(2)` group molecular mass of amino acids is higher
they interact with water more than halo-acids and have SALT like STRUCTURE .

Solution :Amino acids exist as zwitter ions, `H_(3)overset(+)N-CHR-COO^(-)` .Because of this dipolar salt-like character, they have strong dipole-dipole attractions . Hence, their melting points are higher than halo-acids .


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