Consider the following reaction sequence
CH3OH 'A' 'B' 'C' 'D'
Choose the correct option regarding the different products obtained in the above reaction sequence:
'D' is an alcohol consisting one carbon more than the starting alcohol
Product 'B' is formed via SN2-pathway
'C' is an amine
All of the above
The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
acyl chloride > acid anhydride > ester > amide
ester > acyl chloride > amide > acid anhydride
acid anhydride > amide > ester > acyl chloride
acyl chloride> ester> acid anhydride > amide
In the reaction
C7H8 X Y Z
Z is
o-bromotoluene
m-bromotoluene
p-bromotoluene
3-bromo-2, 2, 6- trichlorotoluene
The molal freezing point depression constant for benzene (C6H6) is 4.90 K Kg mol-1. Selenium exists as a polymer of the type Sex. When 3.26 g of selenium is dissolved in 226 g of benzene, the observed freezing point is 0.112C lower than that of pure benzene. The molecular formula of selenium is (atomic mass of Se = 78.8 g mol-1).
Se8
Se6
Se4
Se2
A.
Se8
To calculate the molar mass of Selenium (Se)
Mass of Selenium (WB) = 3.26 gm
Mass of Benzene (WA) = 226 gm = 0.226 kg
Depression in freezing point () = 0.112C
Molar depression constant (Kf) = 4.9K kg mol-1
Given, gram atomic mass of selenium = 78.8 g/mol
For Sex (78.8 g mol-1) = 631.08 g mol-1
or,
Thus, molecular formula of selenium = Se8