CBSE
ethylene can be separated from acetylene by passing the mixture through
fuming H2SO4
pyrogallol
ammoniacal Cu2Cl2
charcoal powder
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?
Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80-100°C forms which one of the following products?
1, 2-dinitrobenzene
1, 3-dinitrobenzene
1, 4-dinitrobenzene
1, 2, 4-trinitrobenzene
On mixing alkane with chlorine and irradiating with ultraviolet light, it forms only one monochloroalkane. The alkane is
Propane
Pentane
Iso-pentane
Neo-pentane
Which of the following compounds will not undergo Friedal-Craft's reaction easily?
Cumene
Xylene
Nitrobenzene
Toluene
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
How nitrobenzene is identified using Mulliken-Barker test?
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
Which one of the following is s-butyl phenyl vinyl methane?