P Block 2

Question 1

Grp 14 IE

Answer 1

Question 2

Grp 14 MP

Answer 2

Question 3

Grp 14 density Order

Answer 3

increases down the grp

Question 4

Oxides at lower or higher, which Oxidation state are more acidic

Answer 4

higher

Question 5

Which Si oxide exists only in high temperature

Answer 5

SiO

Question 6

Sn with water forms

Answer 6

SnO2 + H2

Question 7

Lead with water forms and why?

Answer 7

lead forms nothing with water due to a protective oxide film formation

Question 8

What grp 14 halides are ionic and which grp 14 halide doesn’t exist

Answer 8

SnF4 and PbF4 are ionic

and PbI4 doesn’t exist

Question 9

Halides stability down the grp increase or decreases

Answer 9

increases

Question 10

GeX2 is more/less stable than GeX4

Answer 10

less stable

Question 11

Pb X2 is more/less stable than PbX4

Answer 11

more stable

Question 12

PbO heated with O2 forms ___ ;then that heated with oxygen____ forms; and then heated that with oxygen forms

Answer 12

Question 13

SiCl4 hydrolysis reaction

Answer 13

Question 14

In diamond, each carbon has what hybridisation

Answer 14

sp3

Question 15

In graphite, each carbon has what hybridization

Answer 15

sp2

Question 16

Graphite layers are held by

Answer 16

weak vander vaal forces

Question 17

What is used as a lubricant in machines working a high temp

Answer 17

Graphite becuase it cleaves easily between the layrs

Question 18

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?!

Answer 18

sp2

Question 19

C-C bond length is the maximum in which allotrope

Answer 19

diamond

Question 20

Fullerenes have smooth/rough structure

Answer 20

smooth

Question 21

how are fullerne formed

Answer 21

fullerenes are made by the heating of graphite in an electric arc in presents of inert gases such as helium or argon

Question 22

hydrocarbons with water forms ? and at which condition

Answer 22

it makes CO + H2 and at very high temperature

Question 23

Producer gas equation

Answer 23

prodcuer gas= CO + N2

Question 24

Why are CO poisonous

Answer 24

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

Question 25

Dry ice is formed by

Answer 25

dry ice is mafe by allowing thr liquifies CO2 to expand rapidly

Question 26

Quartz is used in

Answer 26

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 

Question 27

SiO4^-4 structre and shape

Answer 27

shape= tetrahedral

Question 28

SiO number of bonded/unbonded O formulae/trick’

Answer 28

Question 29

Si Polymerization

Answer 29

Question 30

Glasses Is made of up

Answer 30

silicates

Question 31

Silicone dielectric constant , thermal stability, resistance to oxidation

Answer 31

high dielectric strength and thermal stability and resistance to oxidation and chemicals

Question 32

Eg of silicate

Answer 32

zeolites

Question 33

why does grpahite conduccts electricity

Answer 33

becuase it has an unpaired electron

Question 34

Does PbI4 exists? why so?

Answer 34

no it doesnt exists as it doesnt release enough energy to unpair 6s2 electrons 

Question 35

which chloride of grp 14 doesn't hydrolyses by water

Answer 35

CCl4 cuz it doesn't has D orbitals to accompany hh2O

Question 36

Carbon with steam forms ____ and it is also called?

Answer 36

carbon mono oxide and it is also called water gas or synthesis gas

Question 37

CO2 with water forms

Answer 37

H2CO3

Question 38

SnCl2 with Cl- forms?

Answer 38

Question 39

SnCl2 with CuCl2 forms?

Answer 39

Question 40

SnCl2 with NMe3 forms? ans what is the type of bond formed?

Answer 40

coordinate bond is formed

Question 41

Answer 41

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

Question 42

What's used as a drying agent?

Answer 42

silica gel can be used as a drying agent

Question 43

what is used as a sealant?!

Answer 43

silicone

Question 44

what is used as an ion exchanger?

Answer 44

zeolites(silicate)

Question 45

fusing of 5 and 6 membered rings in fullerene

Answer 45

the 6 membered rings are fused to both six and five-membered rings the 5 membered rings are fused only to 6 membered rings