EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main 17 March 2021 Shift 1>Q 4

EASY

JEE Main

IMPORTANT

Earn 100

$15 mL$ of aqueous solution of ${Fe}^{2 +}$ in acidic medium completely reacted with $20 mL$ of $0.03 M$ aqueous ${Cr}_{2} {O_{7}}^{2 -} .$ The molarity of the ${Fe}^{2 +}$ solution is _______ $\times 10^{- 2} M$ (Round off to the Nearest Integer).

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Important Questions on Redox Reactions

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main 16 March 2021 Shift 1>Q 5

2 {MnO}_{4}^{-} + {bC}_{2} O_{4}^{2 -} + {cH}^{+} \to {xMn}^{2 +} + {yCO}_{2} + {zH}_{2} O

If the above equation is balanced with integer coefficients, the value of

c

is _______ . (Round off to the Nearest Integer).

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 9th April 2016>Q 6

What will happen when a block of copper metal is dropped into a beaker containing a solution of

1 M

Z n S O_{4}

?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 8th April 2019 Shift 1>Q 7

In order to oxidize a mixture of one mole of each of

F e C_{2} O_{4}, F e_{2} {(C_{2} O_{4})}_{3}, F e S O_{4}

and

F e_{2} {(S O_{4})}_{3}

in acidic medium, the number of moles of

K M n O_{4}

is:

EASY

JEE Main

IMPORTANT

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

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:

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: