Given below are two statements : Statement-I : Element 'X' and 'Y' are the most and least electronegative elements, respectively among N, As, Sb and P. The nature of the oxides X2O3 and Y2O3 is acidic

Question

Given below are two statements : Statement-I : Element 'X' and 'Y' are the most and least electronegative elements, respectively among N, As, Sb and P. The nature of the oxides X2O3 and Y2O3 is acidic and amphoteric, respectively. Statement-II : BCl3 is covalent in nature and gets hydrolysed in water. It produces [B(OH)4] – and [B(H2O)6] 3+ in aqueous medium. In the light of the above statements, choose the correct answer from the options given below :

(A) Both Statement-I and Statement-II are true.
(B) Statement-I is true but Statement-II is false.
(C) Both Statement-I and Statement-II are false.
(D) Statement-I is false but Statement-II is true.

Prashant Kotian · Accepted Answer

Correct answer: B. N > P > As > Sb Electronegativity order : Most electronegative Least electronegative X = N X2O3 = N2O3 (Acidic) Y = Sb Y2O3 = Sb2O3 (Amphoteric) Statement-I is true BCl3 + 3H2O  B(OH)3 + 3HCl Statement-II is false

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