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Subject: Re: CP4062 : OSRM Quiz Author: wtb [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 07:03:50 08/02/02 Fri In reply to: Admin 's message, "CP4062 : OSRM Quiz" on 06:26:15 08/02/02 Fri Question: Energy is required to Your answer: break bonds during reaction and overcome the repulsion between the electron charge clouds of the two molecules as they approach each other. -------------------------------------------------------------------------------- Question 2 (Received 2 out of 2 points) Question: The rate of the following reaction: P + Q -----> R + S is zero order with respect to P. It means that Your answer: the rate of reaction is independent of the concentration of P. -------------------------------------------------------------------------------- Question 3 (Received 2 out of 2 points) Question: Which one of the following is the rate-determining step of a reaction? Your answer: The slowest step -------------------------------------------------------------------------------- Question 4 (Received 2 out of 2 points) Question: The carbocation is a/an Your answer: electrophile. -------------------------------------------------------------------------------- Question 5 (Received 0 out of 2 points) Question: Which one of the following is the unit for rate? Your answer: mol-1 dm3 s-1 -------------------------------------------------------------------------------- Question 6 (Received 2 out of 2 points) Question: A nucleophile is best described as Your answer: a negative ion -------------------------------------------------------------------------------- Question 7 (Received 2 out of 2 points) Question: Which one of the following is not a Lewis base? Your answer: Phosphorous pentachloride -------------------------------------------------------------------------------- Question 8 (Received 2 out of 2 points) Question: 2-Bromobutane cannot be prepared by Your answer: 1-butene and bromine -------------------------------------------------------------------------------- Question 9 (Received 0 out of 2 points) Question: Which one of the following is neither a nucleophile or an electrophile? Your answer: H2O -------------------------------------------------------------------------------- Question 10 (Received 2 out of 2 points) Question: Chlorofluorocarbons or CFCs in the stratosphere can destroy the ozone layer that protects us from the Sun's harmful ultraviolet radiation. Which one of the following is the propagation step of this reaction? Your answer: Cl atom + O3 (ozone) -----> O2 + ClO radical -------------------------------------------------------------------------------- You scored 16 out of 20 points. -------------------------------------------------------------------------------- [ Next Thread | Previous Thread | Next Message | Previous Message ]

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[> Subject: Re: CP4062 : OSRM Quiz Author: ed [ Edit | View ] Date Posted: 07:04:05 08/02/02 Fri - Which one of the following can behave as an electrophilic reagent? Hydrogen cation - The rate equation for a certain reaction is given by Rate = k[P]. Which one of the following is the rate determining step of the reaction? P ---> Q + S -The rate equation for a certain chemical reaction is given by Rate = k[P][Q][R]. Which one of the following is the slow step of the reaction? P + Q + R ---> X + Y - Activation energy is the minimum energy which the molecules of the reactants must acquire before a reaction can occur. The__________ with respect to a given reactant is the power of the reactant's concentration in the experimentally determined rate equation. order of a reaction 2-Bromobutane cannot be prepared by 1-butene and bromine Which one of the following is neither a nucleophile or an electrophile? H3O+ Chlorofluorocarbons or CFCs in the stratosphere can destroy the ozone layer that protects us from the Sun's harmful ultraviolet radiation. Which one of the following is the propagation step of this reaction? Cl atom + O3 (ozone) -----> O2 + ClO radical A certain reaction can be represented by the following equations: A + B --------> C slow C --------> D + E fast What is the rate equation for this reaction? Rate = k[A][B] A nucleophile is best described as a negative ion Which one of the following is not a Lewis base? Ammonia 1-Bromopropane can be prepared by reacting phosphorous tribromide with 1-Propanol The rate of the following reaction: P + Q -----> R + S is zero order with respect to P. It means that xno P molecules possess sufficient energy to react, x the rate of reaction is proportional to the concentration of Q Which one of the following is the rate-determining step of a reaction? The slowest step [ Post a Reply to This Message ]