From the following pairs of ions which one is not an iso-electronic pair?

1. Mn²⁺, Fe³⁺

2. Fe²⁺, Mn²⁺

3. O^2-, F^-

4. Na⁺, Mg²⁺

The non-polar molecule among the following is-

1. SbCl₅

2. NO₂

3. POCl₃

4. CH₂O

Correct Lewis dot structure of CO molecule among the following is-

1.

2.

3.

4.

 Correct resonance structure of \(CO_{3}^{2-}\) among the following${}_{}^{}$ is-

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-

1. (c – a) 

2. (b – a)

3. (c-a)/2

4. (b-a)/2

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

1. Combining atomic orbitals must have the same or nearly the same energy.

2. Combining atomic orbitals must have proper orientations to ensure that the overlap is maximum

3. Both 1 and 2

4. None of the above

The number of resonating structures exhibited by CO₃^2- ion are

1. 2

2. 3

3. 4

4. 5

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