Cyclopentadienyl anion is
benzenoid and aromatic
non-benzenoid and aromatic
non-benzenoid and non-aromatic
non-benzenoid and anti- aromatic
Balance the following equation by chossing the correct options:
xKNO3 + yC12H22O11 → pN2 + qCO2 + rH2O + sK2CO3
x | y | p | q | r | s |
36 | 55 | 24 | 24 | 5 | 48 |
x | y | p | q | r | s |
48 | 5 | 24 | 36 | 55 | 24 |
x | y | p | q | r | s |
24 | 24 | 55 | 48 | 5 |
x | y | p | q | r | s |
24 | 48 | 36 | 24 | 5 | 55 |
The set representing the right order of ionic radius is
Li+ > Na+> Mg2+ > Be2+
Mg2+ > Be2+> Li+> Na+
Na+> Mg2+> Li+> Be+
Na+> Li+> Mg2+> Be+
The reactivity of alkyl bromides.
Towards iodide ion in dry acetone decrease in the order
V > I > II > III
I > IV> II> III
III> II> I> I
III > II > IV > I
Optically active CH3—CH2—CHOH—CH3 was found to have lost its optical activity after standing in water containing a few drops of acids, mainly due to the formation of
CH3—CH2—CH=CH2
CH3—CH=CH—CH3
CH3—CH(CH3)—CH2—OH
CH3—CH2—CH2—CH2—OH
The bonding in diborane (B2H6) can be described by
4 two centre - two electron bonds and 2 three - centre- two electron bonds
3 two centre - two electron bonds and 3 three - centre- two electron bonds
2 two centre - two electron bonds and 4 three centre - two electron bonds
4 two centre - two electron bonds and 4 two- centre- two electron bonds
The element that forms stable compounds in low oxidation state is
Mg
Al
Ga
Tl
D.
Tl
Thallium (Tl), due to inert pair effect shows stable lower oxidation state and forms stable compounds in low oxidation state.
Atomic radius (pm) of Al, Si,N and F respectively is:
117, 143, 64, 74
143, 117, 74, 64
143, 47, 64, 74
64, 74, 117, 143
Reaction of calgon with hard water containing Ca2+ ions produce
[Na2CaP6O18]2-
CaCO3
CaSO4
Ca2(PO4)3