On heating potassium permanganate, one of the following compound is not obtained.
O2
MnO
MnO2
K2MnO4
B.
MnO
When heated, potassium permanganate decomposes at 513 K.
.
So, MnO is obtained.
Which of the following compound possesses the C-H bond with the lowest bond dissociation energy?
Toluene
Benzene
n-pentane
2, 2-dimethyl propane
In the presence of HCl, H2S results the precipitation of group-2 elements but no group-4 elements during qualitative analysis. It is due to
higher concentration of S2-
higher concentration of H+
Lower concentration of S2-
Lower concentration of H+
An alkali metal hydride (NaH) reacts with diborane in. A to give a tetrahedral compound B which is extensively used as reducing agent in organic synthesis. The compounds A and B respectively are
C2H6 and C2H5Na
CH3COCH3 and B3N3H6
C6H6 and NaBH4
(C2H5)2O and NaBH4
The correct statement is
BF3 is the strongest Lewis acid among the other boron halides
BI3 is the weakest Lewis acid among the other boron halides
there is maximum pπ- pπ back boinding in BF3
there is minimum pπ- pπ back boinding in BF3
The arrangement of following compounds.
(i) Bromomethane
(ii) Bromoform
(iii) Chloromethane
(iv) Dibromomethane
In the increasing order of their boiling point is
III < I < IV < II
IV < III < I < IV
II < III < I < IV
I < II < III < IV
The unit cell with crystallographic dimensions, a≠b≠c,α=γ=90 and β≠ 90 is
triclinic
monoclinic
orthorhombic
tetragonal
While charging the lead storage battery,
PbSO4 on anode is reduced to Pb
PbSO4 on cathode is reduced to Pb
PbSO4 on cathode is oxidised to Pb
PbSO4 on anode is oxidised to PbO2