Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2019Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which is the correct thermal stability order for H 2 E E = O ,   S ,   S e ,   T e   a n d   P o ?

Options

  1. AH 2 S < H 2 O < H 2 S e < H 2 T e < H 2 P o
  2. BH 2 O < H 2 S < H 2 S e < H 2 T e < H 2 P o
  3. CH 2 P o < H 2 T e < H 2 S e < H 2 S < H 2 O
  4. DH 2 S e < H 2 T e < H 2 P o < H 2 O < H 2 S

Correct answer

C. H 2 P o < H 2 T e < H 2 S e < H 2 S < H 2 O

Step-by-step solution

Thermal stability of H 2 E decreases with the decrease in bond dissociation enthalpy of H - E bond down the group. H 2 O &#62; H 2 S &#62; H 2 S e &#62; H 2 T e &#62; H 2 Po

Practice p Block Elements (Group 15, 16, 17 & 18) on Quantrex Academy →

More from p Block Elements (Group 15, 16, 17 & 18)

Identify the incorrect statement from the following : 2026Given below are two statements: Statement-I : Heating NaCl with concentrated H₂ SO₄ and MnO₂ results in oxidation of Mn. Statement-II : Heating NaI with concentrated H₂ SO₄ and MnO 2026Given below are two statements: Statement I : Like nitrogen that can form ammonia, arsenic can form arsine. Statement II : Antimony cannot form antimony pentoxide. In the light of 2025Match List - I with List-II array llll & List-I & & List-II . & XeO ₃ & I. & sp ^3 ~d , linear . & XeF ₂ & II. & sp ^3 ; pyramidal . & XeOF ₄ & III. & sp ^3 ~d ^3 ; distorted octah 2025Among Group 16 elements, which one does NOT show -2 oxidation state? 2024Identify the incorrect statement. 2024The products A and B obtained in the following reactions, respectively, are aligned & 3 ROH + PCl ₃ 3 RCl + A & ROH + PCl ₅ RCl + HCl + B aligned 2024Given below are two statements: Statement I: The boiling point of hydrides of Group 16 elements follow the order H ₂ O H ₂ Te H ₂ Se H ₂ ~S . Statement II: On the basis of molecula 2024 Full p Block Elements (Group 15, 16, 17 & 18) list All NEET PYQs