Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Redox Reactions

NTA Abhyas 2020 · Chemistry · Redox Reactions

Find the values of x, y, z in the given balanced equation H _ 2 S O...

Find the values of x,y,zx, y, z in the given balanced equation H2SO4+xHI→H2S+yI2+zH2O{H}_{2}S{O}_{4} + xHI \to {H}_{2}S + y{I}_{2} + z{H}_{2}O ,

Options

  1. Ax=3,y=5,z=2x = 3, y = 5, z = 2
  2. Bx=4,y=8,z=5x = 4, y = 8, z = 5
  3. Cx=8,y=4,z=4x = 8, y = 4, z = 4
  4. Dx=5,y=3,z=4x = 5, y = 3, z = 4

Correct answer

C. x=8,y=4,z=4x = 8, y = 4, z = 4

Step-by-step solution

Sulphur gains 8 electron in reduction and iodide ion loses 1 electron in oxidation.

Thus values of x,y,zx, y, z are 8, 4, 4 respectively hence the reaction is

H2SO4+8HI→H2S+4I2+4H2O{H}_{2}S{O}_{4} + 8HI \to {H}_{2}S + 4{I}_{2} + 4{H}_{2}O
Practice Redox Reactions on Quantrex Academy →

More from Redox Reactions

500 mL of 0.2 M MnO _4^- solution in basic medium when mixed with 500 mL of 1.5 M KI… JEE Main 2026Given below are two statements: Statement I: Sodium dichromate and potassium dichromate… JEE Main 2026In order to oxidise a mixture of 1 mole each of FeC_2O_4 , Fe_2(C_2O_4)_3 , FeSO_4 and… JEE Main 2026500 mL of 1.2 M KI solution is mixed with 500 mL of 0.2 M KMnO_ 4 solution in basic… JEE Main 2026One mole of Cl_ 2 (~g) was passed into 2 L of cold 2 M KOH solution. After the reaction… JEE Main 2026X and Y are the number of electrons involved, respectively during the oxidation of I^… JEE Main 2026200 cc of x × 10^ -3 M potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's… JEE Main 2026Identify the correct statements : A. Hydrated salts can be used as primary standard. B.… JEE Main 2026 Full Redox Reactions list All NTA Abhyas JEE Main PYQs