Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Advanced2021Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Paragraph: The reaction of K ₃ [ Fe ( CN )₆ ] with freshly prepared FeSO ₄ solution produces a dark blue precipitate called Turnbull's blue. Reaction of K ₄ [ Fe ( CN )₆ ] with the FeSO ₄ solution in complete absence of air produces a white precipitate X , which turns blue in air. Mixing the FeSO ₄ solution with NaNO ₃ , followed by a slow addition of concentrated H ₂ SO ₄ through the side of the test tube produces a

Options

  1. AFe NO 2 SO 4 2 2 -
  2. BFe NO 2 H 2 O 4 3 +
  3. CFe NO 4 SO 4 2
  4. DFe NO H 2 O 5 2 +

Correct answer

D. Fe NO H 2 O 5 2 +

Step-by-step solution

3 Fe 2 + + NO 3 - + 4 H + → NO + 3 Fe 3 + + 2 H 2 O Fe H 2 O 6 2 + + NO → Fe H 2 O 5 NO 2 + Brown   ring + H 2 O

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) : Oxidising power of halogens decreases in the order F₂ > Cl₂ > Br₂ > I₂ , which is the basis of "Layer test". Statement (II) : "Laye 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 2026 Full p Block Elements (Group 15, 16, 17 & 18) list All JEE Advanced PYQs