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1
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Water does not produce CO on reacting with :
A
C
B
CH4
C
C3H8
D
CO2
2
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
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
$${I_2} + {H_2}{O_2} + 2O{H^ - } \to 2{I^ - } + 2{H_2}O + {O_2}$$
3
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
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.
4
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
(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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