Bond dissociation energy of E-H bond of the "$\mathrm{H}_{2} \mathrm{E}$" hydrides of group 16 elements (given below), follows order. (A) O (B) S (C) Se (D) Te

JEE Main · 2023 · 30 Jan 2023 · Shift 2 · p-Block Elements

Bond dissociation energy of E-H bond of the "

H_{2} E

" hydrides of group 16 elements (given below), follows order.
(A) O
(B) S
(C) Se
(D) Te

(A)A $>$ B $>$ C $>$ D✓ Correct
(B)A $>$ B $>$ D $>$ C
(C)B $>$ A $>$ C $>$ D
(D)D $>$ C $>$ B $>$ A

Answer: (A)

Solution

Descending group 16 from oxygen to tellurium the atoms grow steadily larger, the element–hydrogen bond lengthens, and the shared pair is held less firmly. A longer, weaker bond needs less energy to break, so the bond dissociation enthalpy of the E–H bond falls as the size increases. The bonds weaken in the order

H_{2} O > H_{2} S > H_{2} Se > H_{2} Te

, that is

A > B > C > D

JEE Main · 2023 · 30 Jan 2023 · Shift 2 · Single correct option

Practise more: all JEE Main PYQs on p-Block Elements →

More JEE Main questions on p-Block Elements

Given below are two statements:

Statement I: The number of pairs among [ $SiO_{2}, CO_{2}$ ], $[SnO, SnO_{2}], [PbO, PbO_{2}]$ and $[GeO, GeO_{2}]$ , which contain oxides t …
JEE Main 2026View solution →
A 'p'-block element (E) and hydrogen form a binary cation $(EH_{x})^{+}$ , while $EH_{3}$ on treatment with $K_{2} HgI_{4}$ in alkaline medium gives a precipitate of basic mercury(II)amido-iodine. Given below are first …
JEE Main 2026View solution →
Given below are two statements :

Statement I: The halogen that makes longest bond with hydrogen in HX, has the smallest covalent radius in its group.

Statement II : A group 15 element's hydride $EH_{3}$ has the lowest boiling point among corresponding hydrides of oth …
JEE Main 2026View solution →
Two p-block elements X and Y form fluroides of the type $EF_{3}$ . The fluoride compound $XF_{3}$ is a Lewis acid and $YF_{3}$ is a Lewis base. The hybridization of the central atoms of $XF_{3}$ and $YF_{3}$ respectively are
JEE Main 2026View solution →
Given below are two statements:

Statement I: The correct order in terms of bond dissociation enthalpy is $Cl_{2} > Br_{2} > F_{2} > I_{2}$
Statement II: The correct trend in the covalent character of the metal halides is …
JEE Main 2026View solution →
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 $X_{2} O_{3}$ and …
JEE Main 2026View solution →