Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202120 Jul 2021Morning ShiftChemistryHydrogenActual

Given below are two statements : One is labelled as Assertion A and other is labelled as Reason R . Assertion A : The dihedral angles in H 2 O 2 in gaseous phase is 90 . 2 ° and in solid phase is 111 . 5 ° . Reason R : The change in dihedral angle in solid and gaseous phase is due to the difference in the intermolecular forces. Choose the most appropriate answer from the options given below for A and R .

Options

  1. AA is correct but R is not correct.
  2. BBoth A and R are correct but R is not the correct explanation of A .
  3. CBoth A and R are correct and R is the correct explanation of A .
  4. DA is not correct but R is correct.

Correct answer

D. A is not correct but R is correct.

Step-by-step solution

(a) H 2 O 2 structure in gas phase, dihedral angle is 111 . 5 ° . (b) H 2 O 2 structure in solid phase at 110   K , dihedral angle is 90 . 2 ° . Hence given statement ( A ) is not correct But statement ( B ) is correct.

Practice Hydrogen on Quantrex Academy →

More from Hydrogen

The mass of iron converted into Fe₃O₄ by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 , 16 and 56 g mol ⁻¹ respectively) Assume iron is present in exce 2026During water-gas shift reaction 2023Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Isotopes of hydrogen have almost same chemical properties, but d 2023Given below are two statements: Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening of water. Statement II: Synthetic resin met 2023Match List I with List II List I Type of Hydride List II Example A Electron deficient hydride I MgH 2 B Electron rich hydride II HF C Electron precise hydride III B 2 H 6 D Saline 2023Which hydride among the following is less stable? 2023Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Physical properties of isotopes of hydrogen are different. Reas 2023Given below are two reactions, involved in the commercial production of dihydrogen H 2 . The two reactions are carried out at temperature “ T 1 ” and “ T 2 &rdquo 2023 Full Hydrogen list All JEE Main PYQs