Which statement is not correct about fullerene C60 ?
It contains 20 six membered rings and 12 five membered rings
All carbon atoms undergo sp2 hybridisation
A six membered ring is fused with six membered rings only
A five membered ring is fused with six membered ring only
C.
A six membered ring is fused with six membered rings only
C60 (fullerene) looks like a soccer ball and contains 20 six membered rings and 12 five membered rings of carbon atoms. Six membered rings are fused with both six membered as well as five membered rings while five membered rings are attached only with six membered rings.
Among the following select the alkane that is expected to have lowest boiling point
hexane
2-methylpentane
3-methylpentane
2,2-dimethylbutane
'X' is an optically active alkane having lowest molecular mass, Predict the structure of the major product obtained on monochlorination of 'X'.
Which among the following metals is employed to provide cathodic protection to iron?
Zinc
Nickel
Tin
Lead
Oxidation number of nitrogen in which among the oxides of nitrogen is the lowest?
Nitric oxide
Nitrous oxide
Nitrogen dioxide
Nitrogen trioxide
Rate law for the reaction, A+ B → product is rate = k[A]2[B] What is the rate constant; if rate of reaction at a given temperature is 0.22 Ms-1, when [A]= 1 M band [BJ= 0.25 M?
3.52 M-2s-1
0.88 M-2s-1
1.136 M-2s-1
0.05 M-2s-1
Which among the following group 16 elements exists in more than two allotropic states?
Polonium
Tellurium
Selenium
Oxygen
How is electrical conductance of a conductor related with length and area of cross section of the conductor?
G = κ· l· a-1
G = l· a· κ-1
G = κ· a· l-1
G = κ· a· l-2