EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 7th January 2020 Shift 1>Q 12

EASY

JEE Main

IMPORTANT

Earn 100

Oxidation number of potassium in $K_{2} O, K_{2} O_{2}$ and $K O_{2},$ respectively, is:

52.94% studentsanswered this correctly

Important Questions on Redox Reactions

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 7th April 2013>Q 13

Consider the following reaction:

x {MnO}_{4}^{-} + y C_{2} O_{4}^{2 -} + {zH}^{+} ⟶ x {Mn}^{2 +} + 2 y {CO}_{2} + \frac{z}{2} H_{2} O

The values of x, y and z in the reaction are, respectively:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 6th April 2014>Q 14

In which of the following reactions

H_{2} O_{2}

acts as a reducing agent ?

(a) H_{2} O_{2} + 2 H^{+} + 2 e^{-} \to 2 H_{2} O

(b) H_{2} O_{2} - 2 e^{-} \to O_{2} + 2 H^{+}

(c) H_{2} O_{2} + 2 e^{-} \to 2 {OH}^{-}

(d) H_{2} O_{2} + 2 {OH}^{-} - 2 e^{-} \to O_{2} + 2 H_{2} O

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 5 September 2020 Shift 2>Q 15

The volume, in

mL

, of

0.02 {MK}_{2} {Cr}_{2} O_{7}

, solution required to react with

0.288 g

of ferrous oxalate in acidic medium is

\dots \dots \dots \dots

(Molar mass of

Fe = 56 {gmol}^{- 1}

)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 4 September 2020 Shift 2>Q 16

A $100 mL$ solution was made by adding $1.43 g$ of ${Na}_{2} {CO}_{3} . {xH}_{2} O .$ The normality of the solution is $0.1 N$ . The value of $x$ is _______

(The atomic mass of $Na$ is $23 g / mol$ )

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 4 September 2020 Shift 1>Q 17

A $20.0 mL$ solution containing $0.2 g$ impure $H_{2} O_{2}$ reacts completely with $0.316 g$ of ${KMnO}_{4}$ in acid solution. The purity of $H_{2} O_{2}$ (in $%$ ) is______ (mol. wt. of $H_{2} O_{2} = 34$ ; mol. wt. of ${KMnO}_{4} = 158$ )

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 31 August 2021 Shift 2>Q 18

In which one of the following sets all species show disproportionation reaction?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 3 September 2020 Shift 2>Q 19

The volume (in

mL

) of

0.1 N NaOH

required to neutralise

10 mL of 0.1 N

phosphinic acid is ____________.

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 2nd April 2017>Q 20

The products obtained when chlorine gas reacts with cold and dilute aqueous

NaOH

are