P Block 2 Flashcards
Grp 14 IE
Grp 14 MP
Grp 14 density Order
increases down the grp
Oxides at lower or higher, which Oxidation state are more acidic
higher
Which Si oxide exists only in high temperature
SiO
Sn with water forms
SnO2 + H2
Lead with water forms and why?
lead forms nothing with water due to a protective oxide film formation
What grp 14 halides are ionic and which grp 14 halide doesn’t exist
SnF4 and PbF4 are ionic
and PbI4 doesn’t exist
Halides stability down the grp increase or decreases
increases
GeX2 is more/less stable than GeX4
less stable
Pb X2 is more/less stable than PbX4
more stable
PbO heated with O2 forms ___ ;then that heated with oxygen____ forms; and then heated that with oxygen forms
SiCl4 hydrolysis reaction
In diamond, each carbon has what hybridisation
sp3
In graphite, each carbon has what hybridization
sp2
Graphite layers are held by
weak vander vaal forces
What is used as a lubricant in machines working a high temp
Graphite becuase it cleaves easily between the layrs
there are how many 5 membered rings and how many six-membered rings in fullerene structure
and what’s the hybridization of carbon in the structure?!
sp2
C-C bond length is the maximum in which allotrope
diamond
Fullerenes have smooth/rough structure
smooth
how are fullerne formed
fullerenes are made by the heating of graphite in an electric arc in presents of inert gases such as helium or argon
hydrocarbons with water forms ? and at which condition
it makes CO + H2 and at very high temperature
Producer gas equation
prodcuer gas= CO + N2
Why are CO poisonous
CO is highly poisnous as it is about 300 more stable with a complex with haemoglobin as compared to oxyden heamoglobin complex this prevents RBC to carry oxygen and hence results intro death
Dry ice is formed by
dry ice is mafe by allowing thr liquifies CO2 to expand rapidly
Quartz is used in
quartz is extensively used as a piezoelectric material, it has possible to possible develop extremely accurate clocks modern radio and television broadcasting and mobile radio comms
SiO4^-4 structre and shape
shape= tetrahedral
SiO number of bonded/unbonded O formulae/trick’
Si Polymerization
Glasses Is made of up
silicates
Silicone dielectric constant , thermal stability, resistance to oxidation
high dielectric strength and thermal stability and resistance to oxidation and chemicals
Eg of silicate
zeolites
why does grpahite conduccts electricity
becuase it has an unpaired electron
Does PbI4 exists? why so?
no it doesnt exists as it doesnt release enough energy to unpair 6s2 electrons
which chloride of grp 14 doesn’t hydrolyses by water
CCl4 cuz it doesn’t has D orbitals to accompany hh2O
Carbon with steam forms ____ and it is also called?
carbon mono oxide and it is also called water gas or synthesis gas
CO2 with water forms
H2CO3
SnCl2 with Cl- forms?
SnCl2 with CuCl2 forms?
SnCl2 with NMe3 forms?
ans what is the type of bond formed?
coordinate bond is formed
for linear polymer! we must form bonds with only 2 sides! and for termination just one side
therefore the one with Cl will form the linear polymer and the one will one Cl will terminate the chain
What’s used as a drying agent?
silica gel can be used as a drying agent
what is used as a sealant?!
silicone
what is used as an ion exchanger?
zeolites(silicate)
fusing of 5 and 6 membered rings in fullerene
the 6 membered rings are fused to both six and five-membered rings
the 5 membered rings are fused only to 6 membered rings
