AIEEE 2008 PYQ Mock Test

In the following sequence of reactions, the alkene affords the compound ‘B’:
$${\text{CH}}_3\text{CH}={\text{CHCH}}_3\stackrel{{\text{O}}_3}{\to }\text{A}\stackrel{{\text{H}}_2\text{O/Zn}}{\to }\text{B}$$
The compound B is:

A larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being:

In which of the following octahedral complexes of $\text{Co}$ (at. no. 27) will the magnitude of ${\Delta }_o$ be the highest?

At $80^{\circ }\text{C}$, the vapour pressure of pure liquid ‘A’ is $520\text{mm Hg}$ and that of pure liquid ‘B’ is $1000\text{mm Hg}$. If a mixture solution of ‘A’ and ‘B’ boils at $80^{\circ }\text{C}$ and $1\text{atm}$ pressure, the amount of ‘A’ in the mixture is ($1\text{atm}=760\text{mm Hg}$):

For a reaction $\frac{1}{2}A\to 2B$, the rate of disappearance of ‘A’ is related to the rate of appearance of ‘B’ by the expression: