1. Explain IR spectroscopy and its applications
2.Write a note on Enantiomers and pDiastereomers.
3.Explain lanthanide contraction.
4.Write a note on semi conductors
Answers
Explanation:
1. Infrared (IR) spectroscopy is a vibrational spectroscopic technique based on the absorption of infrared radiation by matters that excite vibrations of molecular bonds. It is a powerful method for investigating structural, functional, and compositional changes in biomolecules, cells, and tissues.
2. Enantiomers are the chiral molecules that are mirror images of one another and are not superimposable. Diastereomers are the stereomer compounds with molecules that are not mirrored images of one another and that are not superimposable. They are non-superimposable mirror images of each other.
3. Lanthanide contraction is the gradual decrease in the atomic and ionic size of lanthanoids with an increase in atomic number. Causes of lanthanide contraction: With an increase in the atomic number, the positive charge on nucleus increases by one unit and one more electron enters same 4f subshell.
4. Common elemental semiconductors are silicon and germanium. ... Silicon forms most of ICs. Common semiconductor compounds are such as gallium arsenide or indium antimonide. Semiconductors became essential for many electronic appliances as well as for social infrastructure that support our everyday life.
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