COMEDK 2025 Morning Shift | Chemical Bonding and Molecular Structure Question 4 | Chemistry

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?

$\mathrm{C}_2 / \mathrm{C}_2^{+}$

$\mathrm{O}_2 / \mathrm{O}_2{ }^{+}$

$\mathrm{B}_2 / \mathrm{B}_2{ }^{+}$

$\mathrm{N}_2 / \mathrm{N}_2^{+}$

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

Identify the correct statement.

The central atoms in both $\mathrm{CH}_4$ and $\mathrm{SF}_4$ are in a state of $\mathrm{sp}^3$ hybridisation

The resultant dipole moment of $\mathrm{NF}_3$ is greater than that of $\mathrm{NH}_3$

The $\mathrm{C}-\mathrm{O}$ bond length in $\mathrm{CO}_2$ molecule is 110 pm because of the Inductive effect $(+\mathrm{I})$ of oxygen

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

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-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. $\mathrm{SF}_6$

(i) $A \& F\qquad$ (ii) $A \& E$

(i) $D \& F\qquad$ (ii) $\mathrm{C} \& \mathrm{D}$

(i) $B$ & $E\qquad$ (ii) $\mathrm{A} \& \mathrm{D}$

(i) $\mathrm{C} \& \mathrm{~A}\qquad$ (ii) $\mathrm{B} \& \mathrm{C}$

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-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.

$$\mathrm{BeCl}_2$$ & HNO$$_3$$

$$\mathrm{NO}$$ & PF$$_5$$

$$\mathrm{BCl}_3$$ & NO$$_2$$

$$\mathrm{SCl}_2$$ & NH$$_3$$

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