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

Multiple choice

A chemical substance having one ionizable hydrogen ion is called

  1. hydro compounds

  2. monoprotic

  3. weak electrolytes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A monoprotic acid is defined as an acid that can donate only one proton (hydrogen ion) per molecule. Hydro compounds is a general term, and weak electrolytes refers to the degree of dissociation, not the number of ionizable hydrogens.

Multiple choice

Which of the following is a weak electrolyte?

  1. HBr

  2. H2CO3

  3. HNO3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

HBr and HNO3 are strong acids that dissociate completely in water, making them strong electrolytes. H2CO3 (carbonic acid) is a weak acid that only partially dissociates, classifying it as a weak electrolyte.

Multiple choice

A strong electrolyte is a substance dissociates

  1. never

  2. slightly

  3. completely
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Strong electrolytes are substances that ionize or dissociate completely when dissolved in water, resulting in a high concentration of ions in the solution.

Multiple choice

An anion is:

  1. A positively charged ion.

  2. A negatively charged ion.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An anion is a negatively charged ion, formed when an atom or molecule gains one or more electrons.

Multiple choice

A cation is:

  1. A positively charged ion.

  2. A negatively charged ion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A cation is a positively charged ion, formed when an atom or molecule loses one or more electrons.

Multiple choice

Which forms a stronger bond?

  1. Ionic

  2. Covalent
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ionic bonds are generally considered stronger than covalent bonds due to the strong electrostatic attraction between the full charges of the ions.

Multiple choice

A bond between a metal and a non-metal is called:

  1. Ionic

  2. Covalent

  3. Molecular

  4. Metallic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ionic bonds are characterized by the electrostatic attraction between oppositely charged ions, typically formed by the transfer of electrons from a metal to a non-metal.

Multiple choice

What ion does Sulfur form?

  1. +1

  2. +3

  3. -1

  4. -2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sulfur is in Group 16 and needs 2 more electrons to complete its octet, resulting in a -2 charge when it forms an ion.