EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 28 July 2022 Shift 1>Q 60

HARD

JEE Main

IMPORTANT

Earn 100

For kinetic study of the reaction of iodide ion with $H_{2} O_{2}$ at room temperature :

(A) Always use freshly prepared starch solution.

(B) Always keep the concentration of sodium thiosulphate solution less than that of $KI$ solution.

(C) Record the time immediately after the appearance of blue colour.

(D) Record the time immediately before the appearance of blue colour.

(E) Always keep the concentration of sodium thiosulphate solution more than that of $KI$ solution.

Choose the correct answer from the options given below

50% studentsanswered this correctly

Important Questions on Redox Reactions

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 29 July 2022 Shift 2>Q 61

A compound '

X

' is a weak acid and it exhibits colour change at

pH

close to the equivalence point during neutralization of

NaOH

with

{CH}_{3} COOH

. Compound '

X

' exists in ionized form in basic medium. The compound '

X

' is

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 24 January 2023 Shift 2>Q 62

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 29 January 2023 Shift 2>Q 63

An indicator ‘

X

’ is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion with

H_{2} O_{2}

at room temp. The indicator ‘

X

’ forms blue colored complex with compound ‘

A

’ present in the solution. The indicator ‘

X

’ and compound ‘

A

’ respectively are

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 30 January 2023 Shift 1>Q 64

The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _____ .

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 31 January 2023 Shift 1>Q 65

When

{Cu}^{2 +}

ion is treated with

KI

, a white precipitate,

X

appears in solution. The solution is titrated with sodium thiosulphate, the compound

Y

is formed.

X

and

Y

respectively are

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 31 January 2023 Shift 2>Q 66

Incorrect statement for the use of indicator in acid-base titration is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 6 - Redox Reactions>JEE Main - 1 February 2023 Shift 2>Q 67

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : An aqueous solution of $KOH$ when for volumetric analysis, its concentration should be checked before the use.

Reason (R) : On aging, $KOH$ solution absorbs atmospheric ${CO}_{2}$ .

In the light of the above statements, choose the correct answer from the options given below.