by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
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Medicine Analysis – Synthesising Aspirin results After recrystallisation differences between the crude and purified aspirin were noted. The impure (crude) aspirin was powered and fluffy with small clumps and was slightly yellow in colour whereas the pure aspirin has a less fluffy crystalline powder and was whiter. This showed distinct differences in the two substances but similarities were also apparent showing aspirin‚ in some level‚ was created. Before recrystallisation the crude aspirin could
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Introduction:The purpose of this lab was to determine the activating effect of aniline‚ phenol‚ anisole and acetanilide after reacting with pyridinum tribromide in order to undergo electrophilic aromatic substitution. The melting point of the isolated products were measured against the standards in order to determine how strong of an ortho/para activator the compound was based on the product(s) and melting point obtained. Theory: Electrophilic aromatic substitution is an organic reaction that takes
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routes is reviewed. Production of KA oil from phenol is also covered‚ as is the Asahi process for cyclohexanol production from benzene via cyclohexene. Appropriately adjusted nitric acid oxidation is appended to each of these processes. Solutia‚ working with the Boreskov Institute of Catalysis (BIC) in Russia‚ has developed a one step process to manufacture phenol from benzene‚ using nitrous oxide for the oxidation step. Thus‚ by coupling phenol production and adipic acid production‚ Solutia
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the reaction. It seems‚ phenol is the intermediate of photocatalytic oxidation of benzene‚ which it consumed by active species to generate CO2 and / or H2. Furthermore‚ Figure 6b illustrated CO2 and H2 production on Fe2O3 versus time of irradiation‚ which demonstrates‚ consuming of benzene in the photocatalytic process; however‚ Fe2O3 is less active than the spinel counterpart. In addition‚ phenol generation over Fe2O3 was investigated diligently;Moreover‚ on Fe2O3‚ phenol production detected as the
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method. Carbohydrate fermentation: 1) Phenol red lactose broth. 2) Phenol Red Glucose broth. 1) Phenol red lactose broth test This test is used in order to indicate whether the organism can use lactose as the source of energy or not. Phenol red indicator also added in the broth. In this experiment the color remained red and didn’t change which makes the test negative. It means that the organism didn’t ferment with phenol red lactose (PRL). 2) Phenol Red Glucose broth test In this test if
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plants during photosynthesis. We will be using phenol red to measure the pH and light intensity to see color changes in each test tube. Whether the color intensity of each test tube was acidic‚ neutral‚ or basic in pH. 8. Summarize the procedure in past tense/first person language. Make sure to describe all important aspects of the procedure‚ but do NOT list or cut&paste all the steps as written in the lab handout. We filled three test tubes with phenol red and blew into each test tube with a straw
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recrystallization procedure will be performed. Since salicyclic acid is considered a phenol‚ a Ferric Chloride test (shows the presence of phenols by changing color from orange to different concentrations of purple‚ the darker it is the more concentration of phenol is present.) will be performed at the beginning of the experiment and also after each crystallization in order to demonstrate the presence of phenols in the results and thus the purity of the product. A melting point range will also be
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experiment in order to test the effectiveness of yeasts ’ ability to ferment different carbohydrates. We first filled 6 small flasks with 75 ml of water and 5 drops of phenol red to each flask. Four of these were labeled with the solution that would feed into them and the other two with “control” and the last with “increased CO2.” The color of phenol red is
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1. Double-Strength chloroform water B.P Product Manufacturing Record Product Details Product Code: Name: Double-Strength chloroform water B.P Batch NO: Date of Manufacture Quantity: Ingredients Ingredient Batch NO Formula For 1000 ml Amount Used 100ml POM Check 1. Chloroform 2. Purified water up to
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