JEE Chemistry 2026 Question with Solution

Given: Two statements about electronegativity and hydrolysis behavior of $p$-block compounds are to be checked.

Find: Which option correctly identifies the truth values of Statement I and Statement II.

Step 1: Analyze Statement I. Among $N$, $P$, $As$ and $Sb$, the electronegativity order is

$$\text{Electronegativity order: } N > P > As > Sb$$

So, $X = N$ and $Y = Sb$.

Now, $N_2O_3$ is an acidic oxide, while $Sb_2O_3$ is amphoteric in nature. Therefore, Statement I is true.

Step 2: Analyze Statement II. $BCl_3$ is covalent in nature and undergoes hydrolysis in water. However, it does not produce both $[B(OH)_4]^-$ and $[B(H_2O)_6]^{3+}$.

The species $[B(H_2O)_6]^{3+}$ is characteristic of $Al^{3+}$, not boron. Therefore, Statement II is false.

Conclude: Statement I is true but Statement II is false. Hence, the correct option is A.