Absorption of IR radiation by a molecule causes: O Stretching and bending of chemical bonds O Fragmentation of ions Resonance of hydrogen nuclei Excitation of electrons to a higher energy level O Translational energy
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- A carbon is covalently attached to =O, -CH2-CH3, and -CH3. It is best called a(n): aldehyde fatty acid ketone carbohydrate alcohol amino acid The movement of low-density lipoprotein (LDL) particles into our body cells from the bloodstream occurs by: passive transport a channel protein facilitated diffusion active transport exocytosis Chlorophyll fluorescence occurs when electrons are unable to move forward in the reactions of photosynthesis because the reactions are slowing down. Which of the following would be likely to cause an increase in chlorophyll fluorescence, i.e. by slowing down photosynthesis? choose one or more, or none 1-making more thylakoid membranes in chloroplasts 2-giving chloroplasts access to more CO2 3-raising the pH of the thylakoid spacesIn infrared spectroscopy, the following carbon-hydrogen bonds have peaks at different wave numbers. Explain why this is the caseHNDglag ) tNaOHCag)Naloag Caq)+ HoO D
- What are the types of MSDS forms. Explainwhat are the applications of Atomis Force Microscopy and explain eachWhich of the following is true about fluorescence intensity of the molecule? I Fluorescence is observed in planar molecules and its intensity increase with an increase in the number of aromatic rings II When zinc is added to a hydroxyl quinoline solution the fluorescence intensity increased due to the formation of a complex which increases the rigidity of the molecule. III On increasing the intensity of the incident radiation the fluorescence intensity increases IV On increasing the concentration of the fluorigenic molecule, the fluorescence intensity increases. A plot of intensity vs concentration exhibita linear relation indefinitely in all concentration ranges. O a. II,III,IV O b. 1,11,1II,IV O. I,II,III O d. II,I,IV O e. I,II,IV
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- With the aid of a Jablonski diagram, explain what is meant by the term Fluorescence Resonance Energy TransferTrue or False 1. A strong signal in infrared spectroscopy indicates that a molecule matches the emitted electromagnetic radiation and reports a high transmittance. 2. Among all the possible vibrational modes, symmetric stretching will be IR inactive. 3. A hygroscopic organic sample to be subjected to IR does not need to be kept dry because water molecules in the air will not affect the IR spectra.Molecular Recognition (Supramolecular Chemistry) in organic chemistry deals with the "lock and key " mechanisms that form new molecules. However, little is known of this subject when moleules go beyond 1500 daltons (g/mole) for example macromolecules of polyolefins (polyethylene, polypropylene), thermoplastic polyesters and polyamides (nylon). It is understood that pre-directional H bonding is the mechanism of molecular recognition of macromolecules. Question: What is the immediate and post manifestation of inducing molecular recognition to condensation polymers and ring opening polymerization polymers like thermoplastic polyesters (PET ), and Nylon 66, 6 etc. (polyamides)?