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

1. Mn2+, Fe3+

2. Fe2+, Mn2+

3. O2-, F-

4. Na+, Mg2+

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
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The non-polar molecule among the following is-

1. SbCl5

2. NO2

3. POCl3

4. CH2O

Subtopic:  Polarity |
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Correct Lewis dot structure of CO molecule among the following is-

1.

2.

3.

4.

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
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 Correct resonance structure of \(CO_{3}^{2-}\) among the following is-

1.

2.

3.

4.

Subtopic:  Resonance & Nature of Compounds |
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Match List - I with List - II

List - I List - II
(a) PCl5 (i) Square pyramidal
(b) SF6 (ii) Trigonal planar
(c) BrF5 (iii) Octahedral
(d) BF3 (iv) Trigonal bipyramidal

Choose the correct answer from the options given below

(a) (b) (c) (d)
1. (iii) (i) (iv) (ii)
2. (iv) (iii) (ii) (i)
3. (iv) (iii) (i) (ii)
4. (ii) (iii) (iv) (i)
Subtopic:  V.S.E.P.R & V.B.T |
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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

Subtopic:  Hybridisation |
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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

Subtopic:  Covalent Bond |
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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

 

Subtopic:  M.O.T |
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The number of resonating structures exhibited by CO32- ion are

1. 2

2. 3

3. 4

4. 5

Subtopic:  Resonance & Nature of Compounds |
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Consider the following structure.

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

1. C1 = sp2 , C2 =  sp2

2. C1 = sp3 , C2 = sp3

3. C1 = sp3 , C2 = sp2

4. None of the above

Subtopic:  Hybridisation |
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