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1
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Given below are two statements :

Statement I : H2O2 can act as both oxidising and reducing agent in basic medium.

Statement II : In the hydrogen economy, the energy is transmitted in the form of dihydrogen.

In the light of the above statements, choose the correct answer from the options given below :
A
Both statement I and statement II are false
B
Statement I is false but statement II is true
C
Statement I is true but statement II is false
D
Both statement I and statement II are true
2
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Statements about heavy water are given below :

A. Heavy water is used in exchange reactions for the study of reaction mechanisms.

B. Heavy water is prepared by exhaustive electrolysis of water.

(C) Heavy water has higher boiling point than ordinary water.

(D) Viscosity of H2O is greater than D2O.

Choose the most appropriate answer from the options given below :
A
A, B, and C only
B
A and C only
C
A and D only
D
A and B only
3
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Water does not produce CO on reacting with :
A
C
B
CH4
C
C3H8
D
CO2
4
JEE Main 2021 (Online) 24th February Morning Slot
MCQ (Single Correct Answer)
+4
-1
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(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).
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