BS Chemistry Fundamentals 2

Question 1

What is an ionic bond?

Accepted Answer

A bond formed by the electrostatic attraction between oppositely charged ions

Answer

Ionic bonds result from the transfer of electrons from one atom to another, creating positively and negatively charged ions that attract each other.

Question 2

What is an acid according to the Bronsted-Lowry definition?

Accepted Answer

A substance that donates a proton (H+) to another substance

Answer

The Bronsted-Lowry definition identifies acids as proton donors — they give up hydrogen ions (H+) in a reaction.

Question 3

What is the mole in chemistry?

Accepted Answer

A unit representing 6.022 × 10²³ particles of a substance

Answer

A mole is Avogadro's number (6.022 × 10²³) of particles, allowing chemists to relate atomic-scale quantities to measurable amounts.

Question 4

What is oxidation in a chemical reaction?

Accepted Answer

The loss of electrons by an atom or molecule

Answer

Oxidation is defined as the loss of electrons; it always occurs alongside reduction (gain of electrons) in redox reactions.

Question 5

What is a catalyst?

Accepted Answer

A substance that increases the rate of a reaction without being consumed

Answer

A catalyst lowers the activation energy required for a reaction to proceed, speeding it up without being permanently changed or consumed.

BS - Bachelor of Science Practice Test