JEE Main 2021 (Online) 25th February Morning Shift | Hydrogen Question 52 | Chemistry | JEE Main - ExamSIDE.com

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1

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Which of the following equation depicts the oxidizing nature of H₂O₂?

A

$$C{l_2} + {H_2}{O_2} \to 2HCl + {O_2}$$

B

$$KI{O_4} + {H_2}{O_2} \to KI{O_3} + {H_2}O + {O_2}$$

C

$$2{I^ - } + {H_2}{O_2} + 2{H^ + } \to {I_2} + 2{H_2}O$$

D

$${I_2} + {H_2}{O_2} + 2O{H^ - } \to 2{I^ - } + 2{H_2}O + {O_2}$$

2

JEE Main 2021 (Online) 24th February Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

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

Assertion A : Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.

Reason R : Hydrogen is the lightest element.

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

A

Both A and R are true but R is NOT the correct explanation of A

B

Both A and R are true and R is the correct explanation of A

C

A is true but R is false

D

A is false but R is true.

3

JEE Main 2021 (Online) 24th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

(A) HOCI + H₂O₂ → H₃O⁺ + Cl^- + O₂

(B) I₂ + H₂O₂ + 2OH^- → 2I^- + 2H₂O + O₂

Choose the correct option.

A

H₂O₂ acts as reducing and oxidising agent respectively in equations (A) and (B).

B

H₂O₂ act as oxidizing and reducing agent respectively in equations (A) and (B).

C

H₂O₂ acts as oxidising agent in equations (A) and (B).

D

H₂O₂ acts as reducing agent in equations (A) and (B).

4

JEE Main 2020 (Online) 6th September Evening Slot

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Dihydrogen of high purity (> 99.95%) is obtained through :

A

the electrolysis of acidified water using Pt electrodes

B

the electrolysis of warm Ba(OH)₂ solution using Ni electrodes

C

the electrolysis of brine solution

D

the reaction of Zn with dilute HCl

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