Among the given species  the isostructural pair is : 

1. NF3 and BF3

2. BF4- and NH4+

3. BCl3 and BrCl3

4. NH3 and NO3-

Subtopic:  Hybridisation |
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The molecule having the highest dipole moment is:

1. CO2

2. HI

3. H2O

4. SO2

Subtopic:  Polarity |
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The hybridization of nitrogen in NO2+, NO3- and NH4+ respectively is : 

1. sp, sp3, and sp2

2. sp, sp2, and sp3

3. sp2, sp, and sp3

4. sp2, sp3, and sp

Subtopic:  Hybridisation |
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The correct order of the boiling points of H2O ,  HF ,  NH3 is: 

1. HF > H2O > NH3

2. H2O > HF > NH3

3. NH> HF > H2O

4. NH> H2O > HF

Subtopic:  van der Waal Force & Hydrogen Bonding |
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In PO43- ion, the formal charge on the oxygen atom of the P-O bond is : 

1. +1

2. -1

3. -0.75

4. +0.75

Subtopic:  Octate,Isoelectronic Species ,Lewis Structure & Formal Charge |
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In NO3- ion, the number of bond pairs and lone pairs of electrons on the nitrogen atom is

1. 2, 2

2. 3, 1

3. 1, 3

4. 4, 0

Subtopic:  Octate,Isoelectronic Species ,Lewis Structure & Formal Charge |
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Which species lacks tetrahedral geometry?

1. BH4-

2. NH2-

3. CO32-

4. H3O+

Subtopic:  Hybridisation |
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The number of π bonds and σ bonds in the following structure is :

1. 6, 19

2. 4, 20

3. 5, 19

4. 5, 20

Subtopic:  Resonance & Nature of Compounds |
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Which of the following species doesn't have unpaired electrons?

1. N2+

2. O2

3. O22-

4. B2

Subtopic:  M.O.T |
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In which of the following molecule/ion all the bonds are not equal?

1.  XeF4

2. BF4-

3. C2H4

4. SiF4

Subtopic:  Polarity |
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