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

Electrolytes are made up of chlorine and these two minerals

  1. sodium and potassium

  2. calcium and potassium

  3. sodium and phosphorus

  4. calcium and phosphorus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The major electrolytes in the body's extracellular and intracellular fluids are sodium, potassium, and chloride (chlorine). Together, they maintain osmotic pressure, fluid balance, and proper nerve and muscle function.

Multiple choice

Cl

  1. chlorine

  2. carbon

  3. cesium

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

The chemical symbol Cl represents chlorine, a highly reactive halogen. Carbon is represented by C, cesium by Cs, and chromium by Cr.

Multiple choice

F

  1. fluorine

  2. flerovium

  3. francium

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

The chemical symbol F stands for fluorine, a highly reactive halogen in group 17. Francium is represented by Fr, and flerovium is represented by Fl.

Multiple choice

Nitrogen

  1. N

  2. Ni

  3. Ne

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

Nitrogen is represented by the single-letter chemical symbol N. Ni stands for nickel, and Ne stands for neon.

Multiple choice

Mobile electron carriers in ETS are

  1. PC & Cyt C

  2. Co Q & Cyt C

  3. PQ & PC

  4. PQ & PC
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coenzyme Q (ubiquinone) and Cytochrome c are the two mobile electron carriers in the electron transport system. CoQ moves within the membrane, while Cytochrome c moves along the outer surface of the inner mitochondrial membrane.

Multiple choice

In covalent bonding the __________________.

  1. one atom gives an electron and the other takes it

  2. the atoms share the electrons because they both need one
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Covalent bonding is characterized by the sharing of electron pairs between atoms. This occurs because the atoms involved have similar electronegativities and both need electrons to complete their outer shells.

Multiple choice

Describe the relationship between a compound and a molecule.

  1. All compounds are molecules.

  2. All Molecules are compounds.

  3. All Molecules and compounds are elements.

  4. Molecules and Compounds are not related at all.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A molecule is a group of atoms bonded together. A compound is a substance formed when two or more different elements are chemically bonded. Since all compounds are made of molecules (or formula units), the statement that all compounds are molecules is generally accepted in introductory contexts.

Multiple choice

All organic compounds contain which element?

  1. Oxygen

  2. Helium

  3. Phosphorus

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

Organic chemistry is defined by the study of carbon-based compounds. Carbon's ability to form stable, complex chains is the basis for all known life.