1
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I) : Experimentally determined oxygen-oxygen bond lengths in the $\mathrm{O}_3$ are found to be same and the bond length is greater than that of a $\mathrm{O}=\mathrm{O}$ (double bond) but less than that of a single $(\mathrm{O}-\mathrm{O})$ bond.

Statement (II) : The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact that the bond length in ozone is smaller than that of a double bond $(\mathrm{O}=\mathrm{O})$ but more than that of a single bond $(\mathrm{O}-\mathrm{O})$.

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

A
Statement I is false but Statement II is true
B
Both Statement I and Statement II are true
C
Statement I is true but Statement II is false
D
Both Statement I and Statement II are false
2
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List - I with List - II.

List - I List - II
(A) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 1 (I) Etard reaction
(B) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 2 (II) Gatterman-Koch reaction
(C) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 3 (III) Rosenmund reduction
(D) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 4 (IV) Stephen reaction

Choose the correct answer from the options given below :

A
(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
B
(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
C
(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
D
(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
3
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:

A
Pale Blue $\rightarrow$ Blue $\rightarrow$ Green $\rightarrow$ Violet
B
Pale Blue $\rightarrow$ Blue $\rightarrow$ Violet $\rightarrow$ Green
C
Green $\rightarrow$ Pale Blue $\rightarrow$ Blue $\rightarrow$ Violet
D
Violet $\rightarrow$ Blue $\rightarrow$ Pale Blue $\rightarrow$ Green
4
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

For hydrogen atom, the orbital/s with lowest energy is/are :

(A) $\mathrm{4 s}$

(B) $3 \mathrm{p}_x$

(C) $3 \mathrm{~d}_{x^2-y^2}$

(D) $3 \mathrm{~d}_{z^2}$

(E) $4 \mathrm{p}_z$

Choose the correct answer from the options given below :

A
(A) only
B
(B) only
C
(B), (C) and (D) only
D
(A) and (E) only
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