Chemistry

Chemical Bonding and Molecular Structure

1,277 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

Multiple choice

Which among the following is not a property of ionic compounds?

  1. The ionic compounds split up into oppositely charged ions when dissolved in water

  2. The ionic compounds are good conductors of electricity in the molten state.

  3. Ionic compounds are soluble in non polar solvents

  4. Ionic compounds have high melting and boiling points.

Reveal answer Fill a bubble to check yourself
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.

Multiple choice

Which of the following factors does not favour the formation of covalent bonds?

  1. High nuclear charge and small atomic size

  2. High electron affinity

  3. Equal electron affinity of combining atoms

  4. High ionisation energy
Reveal answer Fill a bubble to check yourself
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. 

Multiple choice

Which among the following is an alkyne compound?

  1. Abietic acid

  2. Acetamide

  3. Acetylene

  4. Acetone
Reveal answer Fill a bubble to check yourself
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.

Multiple choice

Which non-metal is in liquid state?

  1. Bromine

  2. Iodine

  3. Chlorine

  4. Fluorine

  5. Astatine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bromine, a non-metallic chemical element with a valence of one, is only halogen which is liquid at room temperature.

Multiple choice

Which of the following interhalogen compounds is the most stable compound at ambient temperature?

  1. ICl

  2. IBr

  3. BrCl

  4. ClF

  5. IF
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All six possible diatomic compounds between F, Cl, Br and I are known. Indeed, ICl was first made independently by J. L. Gay Lussac and H. Davy in 1813, soon after the isolation of the parent halogens themselves, and its existence led J. von Liebig to miss the discovery of the new element bromine, which has similar properties. CIF is extremely robust; ICl and IBr are moderately stable and can be obtained in very pure crystalline form at room temperature; BrCl readily dissociates reversibly into its elements; BrF and IF disproportionate rapidly and irreversibly to a higher fluoride and Br2 (or I2). Hence, ClF is most stable compound at ambient temperature.