Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JEE Main 202120 JulyEvening Shift

Exam: JEE Main
Year: 2021
Date: 20 July
Shift: Evening Shift
Subject: Chemistry
Chapter: Redox Reactions

JEE Main 2021 · 20 July · Evening Shift · Chemistry · Redox Reactions

Cu ^ 2 + salt reacts with potassium iodide to give

{Cu}^{2 +}

salt reacts with potassium iodide to give

Options

A ${Cu}_{2}{I}_{2}$
B ${Cu}_{2}{I}_{3}$
C $Cul$
DCu{ $\left({I}_{3}\right)}_{2}$

Correct answer

A. ${Cu}_{2}{I}_{2}$

Step-by-step solution

$2{Cu}^{+ 2} + 4{I}^{-} ⟶ {Cu}_{2}{I}_{2}\left(s\right) + {I}_{2}$

$2{Cu}^{+ 2} + 3{I}^{-} ⟶ 2CuI + {I}_{2}$

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 2026 Given below are two statements: Statement I: Sodium dichromate and potassium dichromate… JEE Main 2026 In order to oxidise a mixture of 1 mole each of FeC_2O_4 , Fe_2(C_2O_4)_3 , FeSO_4 and… JEE Main 2026 500 mL of 1.2 M KI solution is mixed with 500 mL of 0.2 M KMnO_ 4 solution in basic… JEE Main 2026 One mole of Cl_ 2 (~g) was passed into 2 L of cold 2 M KOH solution. After the reaction… JEE Main 2026 X and Y are the number of electrons involved, respectively during the oxidation of I^… JEE Main 2026 200 cc of x × 10^ -3 M potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's… JEE Main 2026 Identify the correct statements : A. Hydrated salts can be used as primary standard. B.… JEE Main 2026 Full Redox Reactions list All JEE Main PYQs