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

Find the odd one.

  1. Hydrogen

  2. Oxygen

  3. Carbon

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

Water is compound, others are elements.

Multiple choice

Carbon atoms can achieve the inert gas electron arrangement only by?

  1. To remove four electrons from a carbon atom

  2. To add four electrons to a carbon atom

  3. The sharing to form covalent bonds

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon has four valence electrons. It is energetically unfavorable to lose or gain four electrons, so it achieves a stable octet by sharing electrons with other atoms to form covalent bonds.

Multiple choice

Which of the following is/are polar covalent compound/s?

  1. HCl

  2. Ammonia

  3. Urea

  4. Both 1 and 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Both HCl (hydrogen chloride) and ammonia (NH3) are polar covalent compounds due to the electronegativity difference between the bonded atoms. Since both are polar, option D is the correct choice.

Multiple choice

The ionic compounds are made up of ________.

  1. positive ions

  2. negative ions

  3. positive and negative ions

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ionic compounds are formed by the electrostatic attraction between positively charged ions (cations) and negatively charged ions (anions).

Multiple choice

Which of the following is not a covalent compound?

  1. NaCl

  2. Glucose

  3. Naphthalene

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

NaCl (sodium chloride) is an ionic compound formed by the transfer of an electron from sodium to chlorine. Glucose, naphthalene, and iodine are all covalent compounds.

Multiple choice

Which of the following options is correct for Hydrochloride gas?

  1. It is an ionic compound

  2. It is a covalent compound

  3. 1 and 2 both

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen chloride gas consists of hydrogen and chlorine sharing a pair of electrons, forming a polar covalent bond. It is not an ionic compound in its gaseous state because electrons are shared rather than transferred.

Multiple choice

Methane is a/an _______.

  1. ionic compound

  2. covalent compound

  3. 1 and 2 both

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Methane (CH4) consists of carbon and hydrogen atoms sharing electrons, which characterizes a covalent compound. Ionic compounds typically involve metal-nonmetal electron transfer, which is not the case here.

Multiple choice

Which of the following compounds has all the atoms with a stable 8-electrons inert gas configuration in their outer most shells?

  1. Carbon tetrachloride

  2. Methane

  3. Chloroform

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

In carbon tetrachloride (CCl4), carbon shares four electron pairs with four chlorine atoms, resulting in a stable octet for all atoms involved. While methane also has stable octets, the question asks for compounds where all atoms (including chlorine) reach the noble gas configuration.