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
Posted Date:-2021-03-08 07:06:33
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
Posted Date:-2021-03-08 07:06:33
The reaction of tert butyl bromide with sodium methoxide produces mainly
1.isobutane
2.isobutylene
3.tert-butyl methyl ether
4.sodium tert butoxide
Posted Date:-2021-03-08 07:06:33
-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
Posted Date:-2021-03-08 07:06:33
A Grignard reagent may be made by reacting magnesium with
1.Methyl amine
2.Diethyl ether
3.Ethyl iodide
4.Ethyl alcohol
Posted Date:-2021-03-08 07:06:33
CH3CH2CH2Br + NaCN → CH3CH2CH2CN + NaBr, will be fastest in
1.ethanol
2.methanol
3.N, N-dimethylformamide
4.Water
Posted Date:-2021-03-08 07:06:33
Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
1. Benzyl Chloride
2.Ethyl chloride
3.Chlorobenzene
4.Isopropyl chloride
Posted Date:-2021-03-08 07:06:33
Phosgene is commonly known as
1.thionyl chloride
2.carbonyl chloride
3.carbon dioxide and phosphine
4.phosphoryl chloride
Posted Date:-2021-03-08 07:06:33
The increasing order of nucleophilicity would be?
1. Cl– < Br– < I–
2. I– < Cl– < Br–
3. Br– < Cl– < F–
4. I– < Br– < Cl–
Posted Date:-2021-03-08 07:06:33
Which of the following is most reactive towards SN1 reaction?
1.C6H5C(CH3)C6H5Br
2.C8H5CH2Br
3. C6H5CH(C6H5)Br
4. C6H5CH(CH3)Br
Posted Date:-2021-03-08 07:06:33