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Questions and Answers
The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statement is true for these two species?
The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statement is true for these two species?
The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively:
The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively:
The maximum number of 90 angles between bond pair-bond pair of electrons is observed in:
The maximum number of 90 angles between bond pair-bond pair of electrons is observed in:
Which one of the following specie is diamagnetic in nature?
Which one of the following specie is diamagnetic in nature?
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Which of the following molecule\ion does not contain unpaired electrons?
Which of the following molecule\ion does not contain unpaired electrons?
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Among the following mixtures, dipole-dipole as the major interaction, is present in:
Among the following mixtures, dipole-dipole as the major interaction, is present in:
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A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statement about these chlorides is correct?
A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statement about these chlorides is correct?
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The decreasing values of bond angles from NH3 (106) to SbH3 (91) down group-15 of the periodic table is due to:
The decreasing values of bond angles from NH3 (106) to SbH3 (91) down group-15 of the periodic table is due to:
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In which of the following ionization process, the bond order has increased and the magnetic behaviour has changed:
In which of the following ionization process, the bond order has increased and the magnetic behaviour has changed:
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Which of the following species exhibits the diamagnetic behaviour:
Which of the following species exhibits the diamagnetic behaviour:
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Which one of the following pairs of species have the same bond order?
Which one of the following pairs of species have the same bond order?
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The bond dissociation energy of B-F in BF3 is 646 kJ mol-1 whereas that of C-F in CF4 is 515 kJ mol-1. The correct reason for higher B-F bond dissociation energy as compared to that of C-F is:
The bond dissociation energy of B-F in BF3 is 646 kJ mol-1 whereas that of C-F in CF4 is 515 kJ mol-1. The correct reason for higher B-F bond dissociation energy as compared to that of C-F is:
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Using MO theory predict which of the following species has the shortest bond length?
Using MO theory predict which of the following species has the shortest bond length?
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Among the following the maximum covalent character is shown by the compound:
Among the following the maximum covalent character is shown by the compound:
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Which one of the following molecules is expected to exhibit diamagnetic behaviour?
Which one of the following molecules is expected to exhibit diamagnetic behaviour?
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In which of the following pairs of molecules/ions, both the species are not likely to exist?
In which of the following pairs of molecules/ions, both the species are not likely to exist?
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Stability of the species Li2, Li2+ and 2 Li2+ increases in the order of:
Stability of the species Li2, Li2+ and 2 Li2+ increases in the order of:
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Which one of the following properties is not shown by NO?
Which one of the following properties is not shown by NO?
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The correct order of thermal stability of hydroxides is:
The correct order of thermal stability of hydroxides is:
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Which of the alkaline earth metal halides given below is essentially covalent in nature:
Which of the alkaline earth metal halides given below is essentially covalent in nature:
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Study Notes
Chemical Bonding Exercise Problems
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Bond Order and Bond Length: Bond order in NO is 2.5, while in NO⁺ it's 3. Bond length in NO⁺ is less than NO.
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Hybridization: Boric acid (H3BO3) has boron in sp² hybridization and oxygen in sp³ hybridization.
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Diamagnetism: The He2⁺ species is diamagnetic.
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Unpaired Electrons: N2 does not contain unpaired electrons.
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Dipole-Dipole Interactions: Dipole-dipole interactions are the major interaction in acetonitrile and acetone mixtures.
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Metal Chloride Properties: MCl2 is more volatile, more soluble in anhydrous ethanol, and less easily hydrolyzed than MCl4.
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Bond Angle Trends: Bond angles decrease from NH3 to SbH3 down group 15 due to decreasing lp-bp repulsion and increasing p-orbital character.
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Bond Order Change: The ionization process NO → NO⁺ increases bond order and changes magnetic behavior from paramagnetic to diamagnetic.
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Diamagnetic Species: O2⁺ and NO exhibit diamagnetic behavior.
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Bond Order Pairs: CN and NO⁺ have similar bond orders and CN⁺ and NO⁺ pairs exhibit similar bond orders, O2⁻ and CN⁻ are also similar
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B-F Bond Dissociation Energy: Higher B-F bond dissociation energy compared to C-F is due to significant pπ–pπ interaction in BF3.
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Shortest Bond Length: O2⁺ has the shortest bond length among the listed species.
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Maximum Covalent Character: Aluminum chloride (AlCl3) exhibits the maximum covalent character among the given chlorides.
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Diamagnetic Molecule: C2 is a diamagnetic molecule.
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Non-existing Species: H2⁺ and He2⁻ are unlikely to exist.
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Stabilities of Lithium Species: The order of stability for lithium species is Li₂⁻ < Li₂ < Li₂⁺.
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NO Properties: NO combines with oxygen to form nitrogen dioxide (NO2) and has a bond order of 2.5.
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Thermal Stability of Hydroxides: The order for decreasing thermal stability is Ba(OH)2, Sr(OH)2, Ca(OH)2, Mg(OH)2.
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Covalent Character of Halides: BeCl2 is essentially covalent in nature.
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Hydration Enthalpy: BaSO4 has hydration enthalpy greater than lattice enthalpy and BeSO4 has lower or negligible hydration enthalpy compared to its lattice enthalpy
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Intermolecular Forces: Xenon (Xe) liquefies primarily due to London dispersion forces.
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Bond Angles: The bond angle in NH is the greatest among the given molecules..
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Paramagnetic Molecules: CO exhibits paramagnetic behavior.
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Hybridisation and Shape: species such as BrF₅ displays sp³d² hybridization and has a square pyramidal geometry.
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Oxidation States and Compounds: Xenon hexafluoride (XeF6) on partial hydrolysis produces XeO2F2(+6) and XeO2(+4).
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Number of P-O Bonds: P4O6 has 9 P-O bonds.
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Hybridisation of Xe: Xe in XeOF₄ has sp³d² hybridisation.
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Bond Order and Magnetic Behaviour: The bond order increases and the magnetic behaviour changes (from paramagnetic to diamagnetic) in NO to NO⁺.
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Covalent Character: The covalent character of metal chlorides increases with increasing atomic size
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Thermal Stability: Thermal stability of hydroxides increases with increasing cationic size as shown for hydroxide of group 2 elements.
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Inter-molecular Forces: Ethyl acetate, a liquid, primarily exhibits London dispersion, dipole-dipole, and hydrogen bonding.
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Bond Length and Energy: A-D has the shortest bond length in that species.
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Hybridization, Shapes of Molecules: Species like XeOF₄ exhibits sp³d² hybridisation, and a square planar geometry.
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Magnetic Behaviour of Nitrogen and Oxygen Species: N2 and O2⁻ exhibit diamagnetic behaviour, while NO⁺ exhibits diamagnetic behaviour.
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Oxidation states of Nitrogen in Various Species: The oxidation states of nitrogen in NO, NO2, N2O, and NO3 are ranked in a certain order.
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Number of Lone Pairs and Hybridisation of Xenon Species: The number of lone pairs on central Xe atoms in various species like XeF2, XeO2F2, XeO3F2 and XeF4 was determined accordingly.
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Properties of Phosphorus Oxides: P4O6 contains 9 P-O bonds.
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Properties: various species such as NO2, N2O, CO , XeF2 , and O2 etc were analysed for their shapes.
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Bond Length of O-O: O-O bond length in H2O2 is longer than in F2O2. The O-H bond length in H2O2 is shorter than in F2O2.
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Bond orders: The bond orders of O2²⁻ , CO, and NO⁺ are 1.5, 3, and 2.5 respectively.
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Species with Two Lone Pairs: The number of species having two lone pairs is determined.
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Covalent Character and Ionic Character: Fluoride and Oxide ions exhibit less covalent character than the other. The ionic character increases with increasing cationic size for the specific specie involved.
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Properties of Inter-halogens :Species such as BrF5 and IF5 exhibit various properties. The species BrF5, for instance, exhibits sp³d² hybridization.
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Oxidation States, Bond Orders: Various oxidation states and specific bond orders of nitrogen and other elements are noted throughout.
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Diamagnetism and Paramagnetism: Various species exhibit diamagnetic or paramagnetic properties.
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Bond Enthalpies: The bond order is higher and the magnetic properties change in some species.
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Bond Orders: For specific species, the bond order and magnetic properties (di/paramagnetic) are noted.
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Hybridization and Geometry: Several molecules were analyzed for hybridisation and resultant geometry.
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Description
Test your understanding of key concepts in chemical bonding with this quiz. Topics include bond order, hybridization, magnetic properties, and molecular interactions. Perfect for chemistry students looking to solidify their knowledge in these essential areas.
