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NEET Chemistry p Block Elements (Group 15, 16, 17 & 18) 2024 NEET 2024

NEET Chemistry Question (2024) — Solution

Question

Given 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 molecular mass, H _2 O is expected to have lower boiling point than the other members of the group but due to the presence of extensive H -bonding in H _2 O , it has higher boiling point. In the light of the above statements, choose the correct answer from the options given below:

Options

  1. A. Both Statement I and Statement II are false
  2. B. Statement I is true but Statement II is false
  3. C. Statement I is false but Statement II is true
  4. D. Both Statement I and Statement II are true

Answer

D. Both Statement I and Statement II are true

Step-by-step solution

Statement I is correct, because boiling point of hydrides of group 16 follows the order H _2 O H _2 Te H _2 Se H _2 ~S . Statement II due to intermolecular H -bonding H _2 O shows higher boiling point than respective hydrides of group 16. (Both Statement are true) Order from H _2 Te to H _2 ~S is due to decreasing molar mass.

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Related: Chemistry — p Block Elements (Group 15, 16, 17 & 18) · All PYQ Banks