$$ \text { Compound ' } \mathrm{P} \text { ' undergoes the following sequence of reactions : } $$

$$ ' \mathrm{P}^{\prime} \text { is : } $$

$$ \text { Consider the following compounds } $$

$$ \text { Arrange these compounds in the increasing order of reactivity with nitrating mixture. } $$

The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are :

A. It is red in colour.

B. It has a high solubility in water at $\mathrm{pH}=9$.

C. The Ni ion has two unpaired d-electrons.

D. The $\mathrm{N}-\mathrm{Ni}-\mathrm{N}$ bond angle is almost close to $90^{\circ}$.

E. The complex contains four five-membered metallacycles (metal containing rings).

Choose the correct answer from the options given below :

But-2-yne and hydrogen (one mole each) are separately treated with (i) $\mathrm{Pd} / \mathrm{C}$ and (ii) $\mathrm{Na} /$ liq. $\mathrm{NH}_3$ to give the products X and Y respectively.

Identify the incorrect statements.

A. X and Y are stereoisomers.

B. Dipole moment of $X$ is zero.

C. Boiling point of X is higher than Y .

D. X and Y react with $\mathrm{O}_3 / \mathrm{Zn}+\mathrm{H}_2 \mathrm{O}$ to give different products.

Choose the correct answer from the options given below :