Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main20262 April 2026Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Given below are two statements : Statement (I) : Oxidising power of halogens decreases in the order F₂ > Cl₂ > Br₂ > I₂ , which is the basis of "Layer test". Statement (II) : "Layer test" to identify Br₂ and I₂ in aqueous solution involves the oxidation of bromide or iodide into Br₂ or I₂ respectively with Cl₂ , which is a type of displacement redox reaction. In the light of the above statements, choose the correct a

Options

  1. ABoth Statement I and Statement II are true
  2. BBoth Statement I and Statement II are false
  3. CStatement I is true but Statement II is false
  4. DStatement I is false but Statement II is true

Correct answer

A. Both Statement I and Statement II are true

Step-by-step solution

Statement I is true. The oxidising power of halogens decreases down the group in the order F₂ > Cl₂ > Br₂ > I₂ . A stronger oxidising halogen can displace a weaker oxidising halogen from its aqueous halide solution. This principle forms the basis of the layer test. Statement II is true. In the layer test, chlorine water ( Cl₂ ) is added to an aqueous solution containing bromide ( Br^- ) or iodide ( I^- ) ions. Since Cl₂ is a stronger oxidising agent, it oxidises Br^- to Br₂ and I^- to I₂ . The reaction is given by:

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

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

Correct statement(s) about the compounds X , Y and Z is(are) 2026Correct statement(s) about the compounds P , Q and R is(are) 2026Find the correct statements related to group 15 hydrides. A. Reducing nature increases from NH₃ to BiH₃ B. Tendency to donate lone pair of electrons decreases from NH₃ to BiH₃ C. T 2026Treatment of a gas ' X ' with a freshly prepared ferrous sulphate solution gives a compound ' Y ' as a brown ring. The compounds X and Y are. 2026Correct statements from the following are: A. Nitrogen in oxidation states from +1 to +4 disproportionates in acid medium. B. Nitrogen has the ability to form d - p multiple bonds 2026Given below are two statements: Statement I: The covalency of oxygen is generally two but it can exceed upto four. The oxidation state of oxygen in SO₂ is -2 and in OF₂ it is +2 . 2026Given below are two statements : Statement I : The increasing order of boiling point of hydrogen halides is HCl Statement II : The increasing order of melting point of hydrogen hal 2026Regarding the hydrides of group 15 elements EH ₃( E = N , P , As , Sb ) , select the correct statement from the following: A. The stability of hydrides decreases down the group. B. 2026 Full p Block Elements (Group 15, 16, 17 & 18) list All JEE Main PYQs