Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202126 Feb 2021Morning ShiftChemistryChemical Bonding and Molecular StructureActual

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation. Reason R : Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical. In the light of the above statements, choose the most appropriate answer from the options given belo

Options

  1. AA is false but R is true
  2. BBoth A and R are true but R is NOT the correct explanation of A
  3. CA is true but R is false
  4. DBoth A and R are true and R is the correct explanation of A

Correct answer

A. A is false but R is true

Step-by-step solution

Assertion is incorrect since in hydrogen bonding, Dipole-dipole interactions are noncovalent but ion-dipole interaction can also result in H -bond formation. Reason is correct since F is most electronegative element & structure is Symmetrical H -bonds are present

Practice Chemical Bonding and Molecular Structure on Quantrex Academy →

More from Chemical Bonding and Molecular Structure

The correct order of dipole moments for the given species is 2026Consider the following species: SOCl ₂ , XeOF ₄ , ClF ₃ , ClF ₅ , XeF ₅^+ , SO ₃²⁻ , XeF ₃^+ , SF ₄ List-I contains different molecular shapes and List-II contains total number of 2026The correct order of ONO bond angle in the given species is 2026Bromine trifluoride autoionizes to form BrF ₂^ and BrF ₄^ . The shapes of the cation and anion are respectively ________, and ________. 2026Given below are two statements : Statement I : The number of compounds among SO₂ , SO₃ , SF₄ , SF₆ and H₂ S in which sulphur does not obey the Octet rule is 3 . Statement II : Amon 2026Given below are two statements : Statement I : F ₂ O Statement II : SiF ₄ , SnF ₄ and PbF ₄ are ionic in nature. In the light of the above statements, choose the correct answer fro 2026The pairs among A = [ SO ₃²⁻, CO ₃²⁻] , B = [ O ₂²⁻, F ₂] , C = [ CN ^-, CO ] , D = [ NH ₃, H ₃ O ^+] and E = [ MnO ₄²⁻, CrO ₄²⁻] that do not have similar Lewis dot structure are 2026The covalent radii of atoms A and B are r_A and r_B , respectively. The covalent bond length and total length of AB molecule are respectively 2026 Full Chemical Bonding and Molecular Structure list All JEE Main PYQs