Organic Concepts Quiz 3
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Which of the following terms describes a reaction in where more energy is released by bond formation than is consumed by bond cleavage?
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In which form energy is stored in chemical bonds?
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If a reaction is nth order the half-life period ________ of the initial concentration of the reactants.
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Which is not true for a second order reduction?
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In addition of halogen (Bromine) to an alkene, how can we isolate a bromonium in the reaction?
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The rate of decomposition of a substance increases concentration of substance at same temperature. Find out order of reaction.
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Which of the following is the most activating in electrophilic aromatic substitution?
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Which of the following statement is incorrect about electrophiles?
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Which halogen nucleophile is weakest in polar, aprotic solvents?
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Which reagent is a good nucleophile?
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Which energy is required for homolytic cleavage?
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What is the type of reaction between alkanes and hydroxyl radical?
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Energy released or absorbed in a chemical bond formation or dissociation is measured in which of the following units?
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Which of the following is not true about combustion of hydrocarbons?
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Compound undergoing homolytic bond cleavage will lead to formation of which chemical species?
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What will be the product formed when phenol reacts with Br2 in CCl4 medium?
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How the bond dissociation enthalpy changes as one goes along the series of diatomics Li2, B2, C2, N2, O2 and F2?
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Which energy is required for heterolytic cleavage?
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In a reaction, 2A2 + B2 ? 2A2B, when the reactant A will disappear?
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Which of the following is not an electrophile?
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The rate of reaction that does not involve gases, is not dependent on _____________
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Which of the following statements is true about ammonia and water?
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With respect to enthalpy of combustion which of the following is correct?
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Which of the following is not true about nucleophile?
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The rate of reaction, A + B Products, is given by the equation, r = k[A][B]. If B is taken in excess, what would be the order of reaction?
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Which of the following reaction has a faster rate of reaction for nascent oxygen atom?
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What is the electrophile in the electrophilic substitution reaction of benzene using oleum and conc. H2SO4?
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Which halide ion is the best nucleophile in dimethyl sulfoxide solution?
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What will be the change in energy for the following reaction? H2(g)+F2(g)? 2HF Given: To break one mole of H2, energy absorbed is 436 kJ. To break one mole of F2, energy absorbed is 158 kJ. To form one moles of HF, energy released is 568 kJ.
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The rate law for a reaction between the substances A and B is given by rate = K[A]n [B]m. On doubling the concentration of A and halving the concentration of B. What will be the ratio of the new rate of the earlier rate of the reaction?
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When a bond is dissociated, what is the change in energy in surrounding?
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Which of the following statement is incorrect about oxidation number?
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Which of the following is the slow, low-temperature, flameless form of combustion, sustained by the heat evolved when oxygen directly attacks the surface of a condensed-phase fuel?
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Which one of the following statements best describes the enthalpy change of a reaction?
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Which of the following nucleophile can be used for partial enolization 1,3-Dicarbonyl compound?
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What will be the number of products (excluding stereoisomers) in the given reaction? C6H5CHO + CH3-CHO + NaOH ? Product
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Which of the following cannot react as a nucleophile?
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