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

Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in $z$-direction] ?

A. $2 \mathrm{p}_{\mathrm{z}}$ and $2 \mathrm{p}_{\mathrm{x}}$

B. 2 s and $2 \mathrm{p}_{\mathrm{x}}$

C. $3 d_{x y}$ and $3 d_{x^2-y^2}$

D. 2 s and $2 \mathrm{p}_{\mathrm{z}}$

E. $2 p_z$ and $3 d_{x^2-y^2}$

Choose the correct answer from the options given below:

A
D Only
B
E Only
C
C and D Only
D
A and B Only
2
JEE Main 2025 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following statement is true with respect to $\mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3$ and $\mathrm{CH}_4$ ?

A. The central atoms of all the molecules are $\mathrm{sp}^3$ hybridized.

B. The $\mathrm{H}-\mathrm{O}-\mathrm{H}, \mathrm{H}-\mathrm{N}-\mathrm{H}$ and $\mathrm{H}-\mathrm{C}-\mathrm{H}$ angles in the above molecules are $104.5^{\circ}, 107.5^{\circ}$ and $109.5^{\circ}$, respectively.

C. The increasing order of dipole moment is $\mathrm{CH}_4<\mathrm{NH}_3<\mathrm{H}_2 \mathrm{O}$.

D. Both $\mathrm{H}_2 \mathrm{O}$ and $\mathrm{NH}_3$ are Lewis acids and $\mathrm{CH}_4$ is a Lewis base.

E. A solution of $\mathrm{NH}_3$ in $\mathrm{H}_2 \mathrm{O}$ is basic. In this solution $\mathrm{NH}_3$ and $\mathrm{H}_2 \mathrm{O}$ act as Lowry-Bronsted acid and base respectively.

Choose the correct answer from the options given below:

A
A, D and E Only
B
C, D and E Only
C
A, B and C Only
D
A, B, C and E Only
3
JEE Main 2025 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match the List - I with List - II

List - I
(Classification of molecules based on octet rule)
List - II
(Example)
(A) Molecules obeying octet rule (I) $\mathrm{NO}, \mathrm{NO}_2$
(B) Molecules with incomplete octet (II) $\mathrm{BCl}_3, \mathrm{AlCl}_3$
(C) Molecules with incomplete octet with odd electron (III) $\mathrm{H}_2 \mathrm{SO}_4, \mathrm{PCl}_5$
(D) Molecules with expanded octet (IV) $\mathrm{CCl}_4, \mathrm{CO}_2$

Choose the correct answer from the options given below:

A
A-IV, B-I, C-III, D-II
B
A-II, B-IV, C-III, D-I
C
A-IV, B-II, C-I, D-III
D
A-III, B-II, C-I, D-IV
4
JEE Main 2025 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Arrange the following compounds in increasing order of their dipole moment :

$\mathrm{HBr}, \mathrm{H}_2 \mathrm{~S}, \mathrm{NF}_3$ and $\mathrm{CHCl}_3$

A
$\mathrm{HBr}<\mathrm{H}_2 \mathrm{~S}<\mathrm{NF}_3<\mathrm{CHCl}_3$
B
$\mathrm{H}_2 \mathrm{~S}<\mathrm{HBr}<\mathrm{NF}_3<\mathrm{CHCl}_3$
C
$\mathrm{NF}_3<\mathrm{HBr}<\mathrm{H}_2 \mathrm{~S}<\mathrm{CHCl}_3$
D
$\mathrm{CHCl}_3<\mathrm{NF}_3<\mathrm{HBr}<\mathrm{H}_2 \mathrm{S}$
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