A solution of (+) 2-chloro-2-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of
1.carbanion
2.carbene
3.free radical
4.carbocation
The decreasing order of boiling points of alkyl halides is
1.RF > RCl > RBr > RI
2.RBr > RCl > RCl > RF
3.RI > RBr > RCl > RF
4.RCl > RF > RI > RBr
The reaction of tert butyl bromide with sodium methoxide produces mainly
1.isobutane
2.isobutylene
3.tert-butyl methyl ether
4.sodium tert butoxide
-Cl bond of chlorobenzene in comparison to C-Cl bond in methyl chloride is
1.Longer and weaker
2.Shorter and weaker
3.Shorter and stronger
4.Longer and stronger
A Grignard reagent may be made by reacting magnesium with
1.Methyl amine
2.Diethyl ether
3.Ethyl iodide
4.Ethyl alcohol
CH3CH2CH2Br + NaCN → CH3CH2CH2CN + NaBr, will be fastest in
1.ethanol
2.methanol
3.N, N-dimethylformamide
4.Water
Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
1. Benzyl Chloride
2.Ethyl chloride
3.Chlorobenzene
4.Isopropyl chloride
Phosgene is commonly known as
1.thionyl chloride
2.carbonyl chloride
3.carbon dioxide and phosphine
4.phosphoryl chloride
The increasing order of nucleophilicity would be?
1. Cl– < Br– < I–
2. I– < Cl– < Br–
3. Br– < Cl– < F–
4. I– < Br– < Cl–
Which of the following is most reactive towards SN1 reaction?
1.C6H5C(CH3)C6H5Br
2.C8H5CH2Br
3. C6H5CH(C6H5)Br
4. C6H5CH(CH3)Br