Chemistry
Chemical Bonding and Molecular Structure
1,420 Questions
This section tests your knowledge of chemical bonding, molecular structure, and hybridization. It covers ionic and covalent bonds, octet rule exceptions, and molecular geometry. These chemistry questions are common in various competitive entrance examinations.
Ionic and covalent bondsHybridisation of elementsOctet rule exceptionsMolecular geometryIntermolecular forces
Chemical Bonding and Molecular Structure Questions
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Fluorine
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Chlorine
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Bromine
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Iodine
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Nitrogen
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Phosphorous
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Arsenic
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Antimony
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bond pair - bond pair repulsion
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of lone pair of electrons
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ammonia has trigonal pyramidal shape
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ammonia is a liquid
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The ionic compounds split up into oppositely charged ions when dissolved in water
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The ionic compounds are good conductors of electricity in the molten state.
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Ionic compounds are soluble in non polar solvents
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Ionic compounds have high melting and boiling points.
C
Correct answer
Explanation
Ionic compounds are generally soluble in water and other polar solvents having high dielectric constants. This is due to larger electrostatic interactions between polar solvents and ions. However, ionic compounds are insoluble in non-polar solvents.
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Low ionisation energy
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High electron affinity
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Large lattice energy
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All of above
D
Correct answer
Explanation
All the above mentioned conditions favour the formation of an ionic bond .
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High nuclear charge and small atomic size
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High electron affinity
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Equal electron affinity of combining atoms
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High ionisation energy
B
Correct answer
Explanation
Electron affinity is the amount of energy released, when an isolated gaseous atom accepts an electron to form a negative ion. Therefore, generally, the elements having higher electron affinity favour the formation of an ionic bond.
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(a) and (b) only
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(b) and (c) only
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(a) and (c) only
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All of the above
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None of these
E
Correct answer
Explanation
This is the correct answer as none of the statements are incorrect.
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(a) only
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(b) only
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(c) only
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(b) and (c)
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(a), (b) and (c)
D
Correct answer
Explanation
This is the correct answer as both water and carbon dioxide are triatomic molecules.
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(a) only
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(b) only
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(c) only
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(b) and (c)
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(a), (b) and (c)
E
Correct answer
Explanation
This is the correct answer as all the given compounds are made up of charged ions.
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covalency
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tetravalency
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catenation
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saponification
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electronegativity difference
C
Correct answer
Explanation
Yes, it is correct. Carbon can form bonds with other carbon atoms. This property of carbon is known as catenation.
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Ketonic group
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Aldehyde group
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Halo group
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Carboxylic group
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Alkene group
C
Correct answer
Explanation
Yes, it is correct, as C is attached to halogens with single bond to give a halo hydrocarbon.
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ClF, BrF3
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BrF, ClF
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ClF3, ICl3
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ClF5, BrF3
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ClF, IF7
B
Correct answer
Explanation
BrF is pale brown gas. ClF is colourless gas.
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Benzofuran
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Furan
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Indole
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Aurone
C
Correct answer
Explanation
Indole is an aromatic heterocyclic organic compound. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing pyrrole ring. Indole is a popular component of fragrances and the precursor to many pharmaceuticals.
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Benzisothiazolinone
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Benzisoxazole
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Tetracene
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Benzocaine
C
Correct answer
Explanation
Tetracene has the appearance of a pale orange powder. Tetracene is the four-ringed member of the series of acenes.It is a molecular organic semiconductor, used in organic field-effect transistors (OFETs) and organic light-emitting diodes (OLEDs).
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Abietic acid
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Acetamide
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Acetylene
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Acetone
C
Correct answer
Explanation
Acetylene is a hydrocarbon and the simplest alkyne. This colourless gas is widely used as a fuel and a chemical building block. It is unstable in pure form and thus is usually handled as a solution.