1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
In which one of the following pairs does the stability of the monovalent ion increase with respect to the molecule, while the magnetic character remains the same for both?
A
$\mathrm{C}_2 / \mathrm{C}_2^{+}$
B
$\mathrm{O}_2 / \mathrm{O}_2{ }^{+}$
C
$\mathrm{B}_2 / \mathrm{B}_2{ }^{+}$
D
$\mathrm{N}_2 / \mathrm{N}_2^{+}$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Identify the correct statement.
A
The central atoms in both $\mathrm{CH}_4$ and $\mathrm{SF}_4$ are in a state of $\mathrm{sp}^3$ hybridisation
B
The resultant dipole moment of $\mathrm{NF}_3$ is greater than that of $\mathrm{NH}_3$
C
The $\mathrm{C}-\mathrm{O}$ bond length in $\mathrm{CO}_2$ molecule is 110 pm because of the Inductive effect $(+\mathrm{I})$ of oxygen
D
A molecule of the type $\mathrm{AB}_5 \mathrm{E}$ where the central atom has 5 bond pairs and 1 lone pair has a square pyramid geometry
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

From the given covalent compounds (A to F) identify the pair of molecules which have:

(i) Two lone pairs of electrons on the central atom.

(ii) One lone pair of electrons on the central atom.

A. $\mathrm{SO}_2$
B. $\mathrm{ClF}_3$
C. $\mathrm{BF}_3$
D. $\mathrm{BrF}_5$
E. XeF 4
F. $\mathrm{SF}_6$

A
(i) $A \& F\qquad$ (ii) $A \& E$
B
(i) $D \& F\qquad$ (ii) $\mathrm{C} \& \mathrm{D}$
C
(i) $B$ & $E\qquad$ (ii) $\mathrm{A} \& \mathrm{D}$
D
(i) $\mathrm{C} \& \mathrm{~A}\qquad$ (ii) $\mathrm{B} \& \mathrm{C}$
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the pair of molecules in which one of them is a molecule with an odd electron and the other has an expanded octet.

A
$$\mathrm{BeCl}_2$$ & HNO$$_3$$
B
$$\mathrm{NO}$$ & PF$$_5$$
C
$$\mathrm{BCl}_3$$ & NO$$_2$$
D
$$\mathrm{SCl}_2$$ & NH$$_3$$
COMEDK Subjects
EXAM MAP