Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AIIMS 2017
Exam
AIIMS
Year
2017
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

AIIMS 2017 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Assertion : Hydrides of group-16 elements show volatility in the...

Assertion : Hydrides of group-16 elements show volatility in the order: H2O>H2 S>H2Se>H2Te\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te} Reason : Electronegativity of group-16 elements increases down the group from oxygen to tellurium.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

Hydrides of group-16 elements show volatility in the order : H2 S>H2Se>H2Te>H2O\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{O} Oxygen is most electronegative than other elements of group-16, it undergoes hydrogen bonding. Due to strong intermolecular hydrogen bonding in H2O\mathrm{H}_2 \mathrm{O}, it shows lowest volatility. As the size of the atom increases regularly from sulphur to tellurium, van der Waals' forces of attraction increase and hence volatility decreases from H2 S\mathrm{H}_2 \mathrm{~S} to H2Te\mathrm{H}_2 \mathrm{Te}.
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 : NEET 2026Given below are two statements: Statement-I : Heating NaCl with concentrated H _2 SO _4… NEET 2026Given below are two statements: Statement I : Like nitrogen that can form ammonia… NEET 2025Match List - I with List-II List-I List-II A. XeO_3 I. sp^3 d, linear B. XeF_2 II. sp^3… NEET 2025Among Group 16 elements, which one does NOT show -2 oxidation state? NEET 2024Identify the incorrect statement. NEET 2024The products A and B obtained in the following reactions, respectively, are aligned & 3… NEET 2024Given below are two statements: Statement I: The boiling point of hydrides of Group 16… NEET 2024 Full p Block Elements (Group 15, 16, 17 & 18) list All AIIMS PYQs