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

The statement(s) that are correct about the species $$\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}$$ and $$\mathrm{Mg}^{2+}$$.

(A) All are isoelectronic

(B) All have the same nuclear charge

(C) $$\mathrm{O}^{2-}$$ has the largest ionic radii

(D) $$\mathrm{Mg}^{2+}$$ has the smallest ionic radii

Choose the most appropriate answer from the options given below :

A
(C) and (D) only
B
(A), (C) and (D) only
C
(B), (C) and (D) only
D
(A), (B), (C) and (D)
2
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
3
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 $$\mathrm{CO}_2$$
4
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
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