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

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'.

24.

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 metals is refined by electrolytic method?

• Aluminium

• Bismuth

• Tin

• Lead

Which of the following complexes has lowest molar conductance?

• ${\mathrm{CoCl}}_3·3{\mathrm{NH}}_3$

• ${\mathrm{CoCl}}_3·4{\mathrm{NH}}_3$

• ${\mathrm{CoCl}}_3·5{\mathrm{NH}}_3$

• ${\mathrm{CoCl}}_3·6{\mathrm{NH}}_3$

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