JEE(ADVANCED) – 2014 PAPER-1 Code-1 Questions with Answers PART – 1 PHYSICS SECTION – 1 (One or More Than One Options Correct Type) This section contains 10 multiple choice type questions. Each question has four choices (A)‚ (B)‚ (C) and (D) out of which ONE or MORE THAN ONE are correct. At time ?? = 0‚ terminal A in the circuit shown in the figure is connected to B by a keyand an (????)‚ with ??0 = 1Aand ω = 500 rad s-1 starts flowing in it with alternating current ??(??) = ??0 cos 1. the
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NITROSYL CHLORIDE 657 NITROSYL CHLORIDE [2696-92-6] Formula: ClNO; MW 65.459 Structure: Cl—N=O. bent molecule‚ N—O bond distance 1.139Å and N—Cl bond distance 1.975Å Uses Nitrosyl chloride is an important component of aqua regia. It is an oxidizing agent in organic synthesis. It also is used as a catalyst. Physical Properties Yellow gas; heavier than air‚ density 2.3 (air=1); gas density 2.872 g/L; liquefies at –5.55°C; liquid density 1.273 g/mL; freezes at –59.4°C; critical temperature 167°C;
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Aim: The objective is to identify specific chemical substances within a cell and to be able to verify the presence or absence of each one in a cell or food substance for future testing. Hypothesis: The identification of each biomolecular chemical substance should be verified successfully‚ as well as determining if it is present or absent in the cell(s). Theoretical Base: A biomolecule is a substance that naturally occurs in living organisms. Biomolecules consist primarily of carbon and hydrogen
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LECTURE NOTES 1: Foundations of Biochemistry - 1 open ended and 5 MC Properties of living organisms - self-replication & self-assembly - sensing and resonding to changes in environment - define function for each component and regulation - Classification of organisms based on where they get their energy Phototrophs (take energy from sun light) Chemotrophs (take energy from food in environment) - organotrophs (bacteria) - not photosynthetic Biological 1) Cellular a. nucleus (eukaryotes)
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purify and characterize caffeine from tea leaves and to b. calculate the percentage yield of caffeine. The active ingredient in the tea and coffee is the caffeine‚ which is an alkaloid. Alkaloids contain nitrogen and have properties of an organic amine base. Caffeine has a mild stimulating effect on the central nervous system. Caffeine belongs to the family of xanthine‚ which is known as stimulants. Caffeine is the most powerful xanthine because of its ability to increase alertness‚ put off sleep
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for spectrophotometric determination of the drug. It is simple‚ precise‚ accurate‚ sensitive and reproducible and can be used for the routine quality control testing of the marketed formulations. Glucosamine sulphate (GLS) is a water-soluble amine sugar that is extensively used in the treatment of various conditions of arthritis and collagen deficiency 1-4. Literature survey reveals that the drug can be estimated only by HPLC5 and no spectrophotometric methods have been reported. The present
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1. History The invention of epoxy resin has undergone a long period of time. As early as 1891‚ the German Lindmann hydroquinone and epichlorohydrin with the reaction of condensation into the resin and make use of anhydride curing. But its value has not been revealed. Epoxy plastic has its roots far back in history‚ to be specific‚ in 1936‚ when Dr. Pierre Castan in Switzerland succeeded in synthesizing an epoxy resin that he hardened with pthalic acid anhydride. Dr. Castan’s work was licensed
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Unit operations and unit processes http://www.mine-engineer.com/ • At the end of this unit you should be able to: a. List the various reasons for undertaking size reduction and enlargement in the chemical industry b. Describe the operation principles of some size reduction equipment and size enlargement equipment c. Explain how industrial materials can be separated on the basis of their magnetic‚ electrostatic‚ hydrophobic and volatility differences respectively d. Discuss various organic unit
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compound made then synthesized. The methods used were acid-base titrations‚ redox titrations‚ gravity filtration‚ and distillation. General conclusions included Procedures Weight of Crucibles 1. The first experiment is Preparation of a Cobalt Amine Bromide Product ; Synthesis #3 was used to create the compound. Added 5 grams of cobalt carbonate to 20 mL of hrdrobromic acid in a beaker. Noticied a slight color change to dark purple. Solution frothed after it settled I mixed in 15mL water and did
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Chromatography • • • Separation based on polarity of compounds Two potential phases for a compound to exist in: mobile and stationary Partitioning of compounds between mobile phase and stationary phase occurs: o Compounds that are less polar move more in the mobile phase‚ those that are more polar “stick” more on the stationary phase o These polarity differences cause compounds move at different rates and therefore can be separated 1. Mobile Phase: the phase the moves; can be gas or
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