Which pair of ions from the following list do not constitute an iso-electronic pair?

1. Mn²⁺, Fe³⁺

2. Fe²⁺, Mn²⁺

3. O^2–, F^–

4. Na⁺, Mg²⁺

Which molecule among the following is non-polar?

Which of the following correctly represents the Lewis dot structure of the CO molecule?

1.
2.
3.
4.

Which of the following represents the correct resonance structure of the carbonate ion ( \(CO_{3}^{2-}\))?

1.		2.
3.		4.

Match List - I with List - II

Choose the correct answer from the options given below:

BF₃ is a planar and an electron deficient compound. Hybridization and number of electrons around the central atom, respectively are: 
1. sp² and 6
2. sp² and 8
3. sp³ and 4
4. sp³ and 6

The following graph captures potential energy on the y-axis for hydrogen gas formation as a function of the internuclear distance on the x-axis:
        
The bond energy of H₂ can be represented by:

The condition(s) required for the linear combination of atomic orbital is :

The number of resonating structures exhibited by \(CO^{2-}_3\) ion are :

Consider the following structure.

The hybridization of C₁, and C₂ carbon in the structure are -

1. $C_1$ = ${\mathrm{sp}}^2$ , ${\mathrm{C}}_2$ =  $s{p}^2$

2. $C_1$ = ${\mathrm{sp}}^3$ , ${\mathrm{C}}_2$ = ${\mathrm{sp}}^3$

3. $C_1$ = ${\mathrm{sp}}^3$ , ${\mathrm{C}}_2$ = ${\mathrm{sp}}^2$

4. None of the above