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(a)Calicene has an unusually large dipole moment (ie. separation of charge) for a hydrocarbon. Explain using resonance structures. (b)Cyclopropanone is very reactive because of angle strain. Methylcyclopropanone is quite stab ...
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What are the products in following reactions ? *Image* ...
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Helium can be excited to 1s12p1 configuration by supplying 33.12×10-19 J of energy .The lowest excited singlet state 1s12s1 lies 5000 cm-1 below 1s12p1 state . what should be the average He-X bond energy so that HeX2 could f ...
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Briefly explain the following observations. Where possible and appropriate, use structures and/or mechanisms to support your answers. (a) The carbon-carbon bonds in naphthalene are not equal in length. (b) The resonance energ ...
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Q : 2 H2 + O2 → 2 H2O This reaction is exothermic in the forward direction: 2 H2 + O2 → 2 H2O + 285 kJ but endothermic in the reverse direction: 2 H2O + 285 kJ → 2 H2 + O2 Consider a general reversible reaction such as: ...
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Q.1 : Answer the following questions based on the potential energy diagram shown here: *Image* a. Does the graph represent an endothermic or exothermic reaction? b. Label the position of the reactants, products, and activated ...
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What is the pH of a solution prepared by mixing 0.0100 mol HA (with Ka = 1.00*10-2) and 0.0100 mol of A- and diluting with water to 1.00 L? ...
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Statues coated with white lead on long exposure to atmosphere turn black and the original colour can be restored on treatment with H2O2 .Why ? ...
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The ionization energy of the coinage metals fall in the order Cu<Ag>Au .Why ? ...
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Calculate the vapour pressure of solution having 3.42 g cane sugar in 180 g of water at 40 °C and 100 °C .Given that boiling point of water is 100 °C and heat of vaporization is 10 Kcalmol-1 in the given temperature range. ...
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A balloon of diameter 20 meter weighs 100 Kg.Calculate its pay load , if it is filled with He at 1.0 atm and 27 °C. Density of air is 1.2 Kgm-3. [R=0.082 dm3 atm K-1 mol-1 ] ...
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An engineer claims to have developed an engine which develops 3.4 kW while consuming 0.44 Kg of fuel of calorific value of calorific value of 41870 kJ / kg in one hour. The maximum and minimum temperatures recorded in the cyc ...
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As we known , the number of unpaired valence electrons is the valency therebye, Boron (2s2 2p1) should have monovalency , but it is invariably trivalent , never monovalent why ? ...
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In mineral A2B, atoms B form CCP structure while A atoms occupy the voids within this structure. What are the coordination numbers of atoms A and B ? Name the voids in which atoms A are present and what fraction of these void ...
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Streptimidone is an antibiotic and has the structure shown. How many stereoisomers of streptimidone are possible? How many enantiomers? Using the E,Z and R,S descriptors, specify all the essential elements of stereochemistry ...
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Identify Inorganic salt (A) which is hydrated and light green in colour and gives following reactions : (i) (A) decolorises acidified MnO4-and turns acidified Cr2O72- green. (ii) (A) in aq. solution gives light green turbidit ...
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(IE)1 and (IE)2 of Mg(g) are 740 and 1450 kJ mol-1. Calculate percentage of Mg+(g) and Mg2+(g) if 1 g of Mg(g) absorbs 50.0 kJ of energy. ...
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What is the effective nuclear charge at the periphery of nitrogen atom when an extra electron is added in the formation of an anion.Compare this value when the atom is ionised. ...
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Explain the order of basicity of the following compounds in (i) Gaseous phase and (ii) inaqueous soln. : (CH3)3N, (CH3)2NH, CH3NH2, NH3 Give Proper Explanation. ...
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*Image* What is the Product in above Problem? ...
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Use data from Figure to determine whether a solution containing 48 g of KNO3 per 100 g of water at 40 °C is saturated, unsaturated, or supersaturated *Image* ...
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Methylenomycin A is a potent antibiotic isolated from Streptomyces violaceoruber. Answer the following questions about methylenomycin A. *Image* i) Identify the stereogenic (chiral) centers in Methylenomycin A. Determine whet ...
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n0/2 atoms of X(g) are converted in to X+ (g) by energy ∆H,KJ .n0/2 atom atoms of X(g) are converted in to X+(g) and n0/2 atoms of X(g) converted in to X-(g) by energy ∆H2. calculate the ionization energy and electron aff ...
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K2Pt+4Cl6 is well known compound and corresponding Ni4+ Salt it unknown ? Whereas Ni+2 is more stable than Pt+2. Give Proper Explanation . ...
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Very simple problem. 75.2 g of phenol is dissolved in solvent of Kf = 14, if the depression in freezing point is 7 K. What is the % of phenol ? ...
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Multiple Correct Answer type . The standard enthalpy change of formation of Al2O3(s) is −1669 kJ mol−1 and the standard enthalpy change of formation of Fe2O3(s) is −822 kJ mol−1. (a) ∆Hο for the following reaction. ...
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Please read the paragraph carefully and answer the following questions with proper explanations. A student was investigating the speed of reaction between limestone granules and different concentrations of hydrochloric acid. ...
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Ehylene glycol (HOCH2CH2OH) is a low volatility liquid commonly sold as antifreeze to be mixed with water in car radiators. By adding a nonvolatile solute to the water in the radiator, not only is the freezing point of the re ...
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*Image* Based on this above graph , the correct answers are (a) At point ‘A’ ∆G° becomes O for the reaction. (b) Below point A magnesium can reduce alumina above this point. Aluminium can reduce magnesium oxide. (c) Mo ...
