11.

Which of the following relationships is correct?

• $\ln k=\frac{∆\mathrm{H}°-\mathrm{T}∆\mathrm{S}°}{\mathrm{RT}}$

• $\ln \mathrm{k}=\frac{\mathrm{T}∆\mathrm{S}°-∆\mathrm{H}°}{\mathrm{RT}}$

The sample with largest number of atoms is

• 1g O₂(g)

• 1g Ni(s)

• 1g B(s)

• 1g N₂(g)

Pick out the isoelectronic structures from the following

 $$\begin{gathered} {\mathrm{CH}}_3^{+}; {\mathrm{H}}_3{\mathrm{O}}^{+}; {\mathrm{NH}}_3; {\mathrm{CH}}_3^{-} \\ \mathrm{I} \mathrm{II} \mathrm{III} \mathrm{IV} \end{gathered}$$

• I and II

• I and III

• I and IV

• II, III and IV

Which one of the following hydrocarbons has octane number 100?

• 2, 2, 3-trimethylpentane

• 2, 3, 3-trimethylpentane

• 2, 2, 4-trimethylpentane

• 2, 3, 4-trimethylpentane

Which one of the following is both nucleophilic and electrophilic?

• CH₄

• CH₃CN

• H₂O

• CH₃OH

The temperature of maximum density of H₂O and D₂O respectively are

• 0°C and 11.6°C

• 4°C and 0°C

• 4°C and 11.6°C

• 4°C and 12.5°C

Doping of silicon with boron leads to

• n-type semiconductor

• p-type semiconductor

• superconductor

• insulator

Which one of the following is the best reagent to accomplish the following conversion ?

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Br} \stackrel{?}{\to } {\mathrm{CH}}_3-{\mathrm{CH}}_3$

• NaBH₃

• Na|ether

• Zn|C₂H₅OH

• Mg followed by H₃O⁺

Which one of the following gases has both oxidising as well as reducing property?

• CO

• SO₂

• H₂S

• PH₃

Among the following, the group of molecules that undergoes rapid hydrolysis is

• SF_6, Al₂Cl₆, SiMe₄

• BCl₃, SF₆, SiCl₄

• BCl₃, SiCl₄, PCl₅

• SF₆, Al₂Cl₆, SiCl₄