Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?
The radical because it has
6p-orbitals and 6 unpaired electrons
7p-orbitals and 6 unpaired electrons
7p-orbitals and 7 unpaired electrons
6p-orbitals and 7 unpaired electrons
Which of the following compounds will not undergo Friedal-Craft's reaction easily?
Cumene
Xylene
Nitrobenzene
Toluene
On mixing alkane with chlorine and irradiating with ultraviolet light, it forms only one monochloroalkane. The alkane is
Propane
Pentane
Iso-pentane
Neo-pentane
What is obtained when nitrobenzene is treated sequentially with (i) NH4Cl/Zn dust and (ii) H2SO4/Na2Cr2O7?
meta-chloronitrobenzene
para-chloronitrobenzene
Nitrosobenzene
Benzene
The addition of HBr to 2-pentene gives
2-bromopentane only
3-bromopentane only
2-bromopentane and 3-bromopentane
1-bromopentane and 3-bromopentane
ethylene can be separated from acetylene by passing the mixture through
fuming H2SO4
pyrogallol
ammoniacal Cu2Cl2
charcoal powder
In the compound the hybridisation of C-2 and C-3 carbons are respectively
sp3 and sp3
sp2 and sp3
sp2 and sp
sp3 and sp
C.
sp2 and sp