P BLOCK PART 2: CARBON FAMILY(14TH GROUP ELEMENTS)

Question 1

How many 6 and 5 membered rings does C60 have?

Answer 1

20, 6 membered and 12, 5 membered

Question 2

C60

Answer 2

BUCKMISTERFULLERENE

Question 3

Stages of transformation of coal

Answer 3

Peat, lignite, bituminous, steam coal and anthracite

Question 4

Uses:
Moderator in nuclear reactor
Removing offensive odor from air
Manufacture of coal gas
Decolorizing sugar syrup
In gas masks
Electrodes
Electric furnaces
Black/Indian Printing inks or paints

Answer 4

Graphite
Charcoal
Coal
charcoal
charcoal
graphite
graphite
carbon black

Question 5

Crude form of carbon

Answer 5

Coal

Question 6

Ionic or Slat like carbides

Answer 6

Compounds of carbon with highly electropositive elements (Mainly metals)

Question 7

Interstitial Carbides

Answer 7

Carbon compounds of transition metals

Question 8

Covalent carbides

Answer 8

Compounds of carbon with elemnts having Electronegativity lower than C : SIC, B4C

Question 9

Si reaction with {dash} takes how much heat
F2
C
N2
O2
Cl2

Answer 9

25
2200
1400
900
450

Question 10

Si + KOH gives

Answer 10

K2SiO3

Question 11

Ultrapure Silicon is obtained by?

Answer 11

Zone refining

Question 11

SiO2 + mg gives?

Answer 11

Amphorous Silicon

Question 11

Sio2 + C(coke) gives

Answer 11

Crystalline Silicon

Question 12

Pyrosillicate forms which ion?

Answer 12

Si2(O7)6-

Question 12

Island structure is possesed by?

Answer 12

Pyrosillicate

Question 13

Which element from 14th group doesn’t show catenation?

Answer 13

Lead, Pb

Question 14

Nature of:
Co2,sio2,Geo2, Sno,Sno2, Pbo,
Pbo2,
Ga2O3
Co,
GeO
SO3
Co3
PbO2
Tl2O3
BeO

Answer 14

Acidic ,Acidic, Acidic, amphoteric, amphoteric, amphoteric, amphoteric,
amphoteric,
Neutral,
Distinctly acidic,
Acidic
Moderately basic
Amphoteric
Basic
Amphoteric

Question 15

Which element of group 14 doesn’t show reaction with water?

Answer 15

Lead, pb

Question 16

Oxidising power decrease down the group in 14th group due to?

Answer 16

Inert Pair effect

Question 17

Cesium is used for makin

Question 18

SiC + HF

Answer 18

No reaction as SiC is inert

Question 19

Glass

Answer 19

Pseudo solid

Question 20

Silicon uses

Answer 20

Cement, glass, transistors, semiconductors

Question 21

Tin mainly occurs as

Answer 21

cassiterite(SnO2)

Question 22

Lead occurs as

Answer 22

Galena(PBS)

Question 23

Sheet silicates gen. formula

Answer 23

(SI2O52-)n

Question 24

Chain silicates gen. formula

Answer 24

(Si4O6 6-)n

Question 25

Cyclic/ Ring silicates gen. formula

Answer 25

(SiO3 2-)n

Question 26

Thermodynamically most stable carbon form is:

Answer 26

Graphite