1
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The reaction at cathode in the cells commonly used in clocks involves.

A
oxidation of $$\mathrm{Mn}$$ from +2 to +7
B
reduction of $$\mathrm{Mn}$$ from +4 to +3
C
oxidation of $$\mathrm{Mn}$$ from +3 to +4
D
reduction of $$\mathrm{Mn}$$ from +7 to +2
2
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The following reaction occurs in the Blast furnance where iron ore is reduced to iron metal

$$\mathrm{Fe}_2 \mathrm{O}_{3(s)}+3 \mathrm{CO}_{(g)} \rightleftharpoons \mathrm{Fe}_{(\mathrm{l})}+3 \mathrm{CO}_{2(g)}$$

Using the Le-chatelier's principle, predict which one of the following will not disturb the equilibrium.

A
Addition of $$\mathrm{CO}_2$$
B
Removal of $$\mathrm{CO}$$
C
Addition of $$\mathrm{Fe}_2 \mathrm{O}_3$$
D
Removal of $$\mathrm{CO}_2$$
3
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify compound (Z) in the following reaction sequence.

JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Compounds Containing Nitrogen Question 28 English

A
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Compounds Containing Nitrogen Question 28 English Option 1
B
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Compounds Containing Nitrogen Question 28 English Option 2
C
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Compounds Containing Nitrogen Question 28 English Option 3
D
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Compounds Containing Nitrogen Question 28 English Option 4
4
JEE Main 2024 (Online) 5th April Morning Shift
Numerical
+4
-1
Change Language

The spin-only magnetic moment value of the ion among $$\mathrm{Ti}^{2+}, \mathrm{V}^{2+}, \mathrm{Co}^{3+}$$ and $$\mathrm{Cr}^{2+}$$, that acts as strong oxidising agent in aqueous solution is _________ BM (Near integer).

(Given atomic numbers : $$\mathrm{Ti}: 22, \mathrm{~V}: 23, \mathrm{Cr}: 24, \mathrm{Co}: 27$$)

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