Chemistry MCQs

Page No. 20

Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?


aprimary alcohol

✓


bsecondary alcohol

✖


ctertiary alcohol

✖


ddihydric alcohol

✖


View Answer primary alcohol

Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?


aformaldehyde

✖


bketone

✖


cethylene epoxide

✖


dBoth A and C

✓


View Answer Both A and C

Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?


athey have an electrophilic carbon

✖


bthey have an electrophilic carbon & a good leaving group

✓


cthey have an electrophilic carbon & a bad leaving group

✖


dthey have a nucleophilic carbon & a good leaving group

✖



For which mechanisms the first step involved is the same ?


aE1 + E2

✖


bE2 + SN2

✖


cE1 and SN1

✓


dSN1 and SN2

✖


View Answer E1 and SN1

SN2 reaction can be best carried out with__________________?


aprimary alkyl halide

✓


bsecondary alkyl halide

✖


ctertiary alkyl halide

✖


dall

✖


View Answer primary alkyl halide

When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?


apropane

✖


bpropanoic acid

✓


cpropanal

✖


dpropanol

✖


View Answer propanoic acid

When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?


a2 moles of ethane

✖


b1 mole of ethane

✖


c2 moles of butane

✖


d1 mole of butane

✓


View Answer 1 mole of butane

Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?


aCH3-X

✖


b(CH3)3 C-CH2 – X

✖


c(CH3)2 CH – X

✓


d(CH3)3 C – X

✖


View Answer (CH3)2 CH – X

Which one is not a nucleophile ?


aC2H5O-

✖


bSCN-

✖


cNH3

✖


dH3C+

✓


View Answer H3C+

Which alkyl halide has the highest reactivity for a particular alkyl group ?


aR-F

✖


bR-C

✖


cR-Br

✖


dR-I

✓


View Answer R-I

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