Sindh MDCAT 2022 Chemistry#Alkyl Halides#SN1 Reaction41Choose the best answerQ.109 SN¹ mechanism is a:AFormation of carbocation is fast stepBSingle step mechanismCTwo step mechanismDAttack of nucleophile on a carbocation is slow step Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Fundamental Principles of Organic Chemistry#Wöhler's Synthesis42Choose the best answerQ.103 The first organic compound manufactured from inorganic compound was:AEthyl acetateBUreaCAcetic acidDMethane Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Gamma Radiation#Radioactivity43Choose the best answerQ.111 The option having all the properties of γ-rays:ANeutron highly penetrating, velocity is equal to that of light. Remain undeflected in magnetic fieldBMost penetrating, velocity is equal to that of light, no deflection in magnetic field, short wavelength, shorter than X-raysCLeast penetrating, velocity of light, deflects in magnetic field, helium nucleusDProton least penetrating, deflects like negative particle in magnetic field Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Chemical Equilibrium#Dynamic Equilibrium44Choose the best answerQ.82 At equilibrium in a reversible reaction:AThe rate of backward reaction > rate of forward reactionBThe rate of forward reaction > rate of backward reactionCThe rate of forward reaction is same as rate of backward reactionDThe concentration of reactants & products becomes constant & the rate of forward reaction is same as the rate of backward reaction Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Chemical Kinetics#Surface Area and Reaction Rate45Choose the best answerQ.88 Pulverized CaCO₃ reacts faster because of the increase in:APressureBSurface areaCVolumeDSurface tension Like 0 Discuss 0Share