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NEET • CHEMISTRY • CHEMICAL BONDING & MOLECULAR STRUCTURE

Chemical bonding & molecular structure practice · Mixed difficulty

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571 Medium

571 of 579

Understanding +4 | -1

The species which does not exist is

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Correct option: B

{C_2}

Option D (

H{e_2}

) is correct because

H{e_2}

has a bond order of 0, indicating that it does not exist as a stable molecule.

572 Easy

572 of 579

Application +4 | -1

Which of the following species would be expected paramagnetic

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Correct option: C

{Cu}^{++}

Option C (

{Cu}^{++}

) is correct because

Cu^{++}

has an unpaired electron in its electronic configuration, making it paramagnetic.

573 Medium

573 of 579

Remembering +4 | -1

Which of the following has the highest melting point

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Correct option: B

Diamond

Option B (Diamond) is correct because diamond has a giant covalent network structure with strong covalent bonds throughout, requiring a large amount of energy to break.

574 Easy

574 of 579

Remembering +4 | -1

Debye is

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Correct option: C

Unit of dipole momentum

Option C is correct because Debye is the unit used to measure dipole moment.

575 Easy

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Application +4 | -1

Bond order of

\mathrm{N}_2^ -

anion is :

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Correct option: C

2.5

Option C (2.5) is correct because the bond order is calculated as (bonding electrons - antibonding electrons)/2, and for

N_2^-

it is (10-5)/2 = 2.5.

576 Easy

576 of 579

Remembering +4 | -1

Electrolytes are compound containing

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Correct option: A

Electrovalent bond

Option A (Electrovalent bond) is correct because electrolytes are compounds that dissociate into ions in solution, which is characteristic of electrovalent or ionic bonds.

577 Easy

577 of 579

Remembering +4 | -1

The value of one debye unit is equal to :

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Correct option: C

3.33 \times 10^{-30} \mathrm{~Cm}

Option C (

3.33 \times 10^{-30} \mathrm{~Cm}

) is correct because one debye unit is defined as

3.33 \times 10^{-30}

Coulomb-meters.

578 Easy

578 of 579

Analyzing +4 | -1

Which of the following compounds has lowest boiling point?

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Correct option: C

{CuCl}_2

Option D (

{CuCl}_2

) is correct because it is the least ionic compound among the options due to higher polarization and thus has the lowest boiling point.

579 Easy

579 of 579

Remembering +4 | -1

Molecular orbitals theory was proposed by:

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Correct option: D

Mullikan

Option D (Mullikan) is correct because Robert S. Mulliken is one of the primary developers of the molecular orbital theory.

Revision notes and key takeaways

Review CHEMICAL BONDING & MOLECULAR STRUCTURE in your textbook or class notes, then use this set to check your understanding.

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Chemical bonding & molecular structure practice · Mixed difficulty

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