NCERT Class XII Chemistry
Chapter - Biomolecules
Questions with Solutions

© examsnet.com
Question : 29
Total: 33
The melting points and solubility in water of amino acids are higher than those of the corresponding haloacids. Explain.
Solution:  
The amino acids exist as zwitter ions, H3N+OHRCOO. Because of this dipolar salt like character they have strong dipole-dipole attractions. So, their melting points are higher than halo acids which do not have sail like character. Moreover, due tothis salt like character, they interact strongly with H2O. Thus, solubility of amino acids in water is higher than that of the corresponding halo acids which do not have salt like character.
© examsnet.com
Go to Question: