EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 8th April 2018>Q 8

EASY

JEE Main

IMPORTANT

Earn 100

The oxidation states of $Cr$ in $[Cr {(H_{2} O)}_{6}] {Cl}_{3}, [Cr {(C_{6} H_{6})}_{2}]$ and $K_{2} [Cr {(CN)}_{2} {(O)}_{2} (O_{2}) ({NH}_{3})]$ , respectively, are:

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Important Questions on Redox Reactions

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 8th April 2018>Q 9

An alkali is titrated against acid with methyl orange as an indicator, which of the following is a correct combination?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 8th April 2017>Q 10

The pair of compounds having metals in their highest oxidation state is

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 7th January 2020 Shift 2>Q 11

The redox reaction among the following is:

EASY

JEE Main

IMPORTANT

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

Oxidation number of potassium in

K_{2} O, K_{2} O_{2}

and

K O_{2},

respectively, is:

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 $23 g / mol$ )