out of four problems. ❆ To simplify the problem‚ hints and expected compounds related to molecular formula‚ general formula are given in this material. ❆ Problems available in PTA book and Govt exam question paper (upto March 2013) are solved in easiest way. ❆ Repeated practice is enough to get full marks. ❆ Problems are given in the following order 70(a)Hydroxy derivatives (b) d-block elements or (c) Carbonyl compounds (d) Electro chemistry - I www.kalvisolai.com 5 Mark Compulsory Problems
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Pre-Lab Work Sheet Which type of compound usually has higher melting points: ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points) Ionic compounds have higher melting and boiling points than covalent compounds. The electrostatic attraction in an ionic bond is very strong hence a lot of heat energy is required to break it down‚ ionic bonds have high melting and boiling points. In covalent bonds‚ the intermolecular forces are very weak and
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CHEMICAL BONDS Chemical Bonds I. Introduction Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms called a chemical bond. The two extreme cases of chemical bonds are the covalent bonds and ionic bonds. Covalent bonds are bonds in which one or more pairs of electrons are shared by two atoms. Covalent bonds
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Serology Serology? What is serology? How do Forensic Scientists use serology? Serology is the study of blood‚ blood serum‚ saliva‚ semen‚ and other bodily fluids. However the reason that this became a discipline of Forensic Science is because forensic scientists can use the DNA found from the different assortments of bodily fluids in order to narrow down and eliminate possible suspects. Forensic Serology is the study of serology in the relation to crimes and other legal matters‚ using a biological
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property of R. discolor is correlated to the phytochemicals present in the plant. Yet‚ there is no existing claim that the anthocyanin content of this plant is the sole compound that exhibit the antioxidant property. Plants contain a wide variety of antioxidants‚ and it is difficult to separately measure the antioxidant capacity of each compound (Medini‚ Fellah‚ Ksouri‚ & Abdelly‚ 2014). As a result‚ this study was conducted to evaluate the total antioxidant capacity of the crude leaf extract with special
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Identifying the ionic compound By visual inspection‚ the compound in bottle A was pure element‚ and the compound in bottle D was heterogeneous mixture because the mixture does not mix well and the proportions of substances were uneven visually. To determine the ionic compound from compound B and compound C‚ a conductivity test and solubility test were carried out. Both compounds were mixed with water. Both compounds were soluble in water. Therefore‚ the type of compounds could not yet be determined
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Be able to develop an Experiment Beginning to End * Find a good reaction * Good reaction is defined by high yield‚ green chemistry (less waste‚ less harmful chemicals) * Reaction found on Reaxys * Find MSDS Sheet for all Compounds (Reactants‚ Products and Side Products) * It is important to know what you are working with * The toxicity category numbers are there to gauge how toxic the chemical is‚ 4 being most severe and 1 being least. * Safety‚ no exposed
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March 2013 Identify and Unknown Ionic Compound ILI#3 Abstract: In this laboratory investigation‚ 8 solutions were combined with each other and an unknown liquid #1 in order to identify the ionic compound in the unknown solution. The students performed an experiment in which the reactions between each substance were compared to the unknown solution #1’s reactions and the color of each solution was compared to help find the unknown #1. The unknown ionic compound was identified to be Zinc Sulfate as
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Abstract. The present study focused on the separation and identification of the active compounds against head lice from the hexane extract of Annona squamosa L seed. Chromatographic and spectroscopic techniques revealed that two major compounds of the hexane seed extract were oleic acid and triglyceride with one oleate ester. The yields of these compounds were 13.25% and 7.74% dry weight‚ respectively. The compounds were tested in vitro against head lice‚ comparing to the crude hexane extract of the
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Lab Report: [Liquid Density] Your Name: ______________________________________________________________ 1 Purpose of this Lab What is the goal of this lab? What question are you trying to answer‚ or what problem are you trying to explain? | | |
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