question The atomic number of an element represents the number of

Chemistry

The atomic number of an element represents the number of:

A. Protons
B. Neutrons
C. Electrons
D. Nucleons

The atomic number is equal to the number of protons in an atom.

The reaction between an acid and a base is known as:

A. Neutralization
B. Oxidation
C. Reduction
D. Ionization

What is the pH range of basic solutions?

A. 8 to 14
B. 0 to 6
C. 0 to 14
D. 7 to 14

Which of the following is an example of a secondary alcohol?

A. CH₃OH
B. CH₃CH₂OH
C. (CH₃)₂CHOH
D. CH₃COOH

What is the chemical formula of sulfuric acid?

A. H₂SO₄
B. HCl
C. HNO₃
D. H₃PO₄

Which method involves measuring the voltage difference across an electrochemical cell to determine the concentration of an analyte?

A. Potentiometry
B. Voltammetry
C. Conductometry
D. Coulometry

The principle that electrons fill the lowest energy orbitals first before pairing up is known as:

A. Hund's rule
B. Pauli exclusion principle
C. Heisenberg uncertainty principle
D. Aufbau principle

The reaction between an acid and an alcohol to form an ester is known as:

A. Esterification
B. Hydrolysis
C. Saponification
D. Dehydration

Which enzyme catalyzes the synthesis of RNA using a DNA template during transcription?

A. RNA polymerase
B. DNA ligase
C. DNA helicase
D. DNA polymerase

Which acid is produced in the stomach to aid digestion?

A. Hydrochloric acid (HCl)
B. Sulfuric acid (H₂SO₄)
C. Nitric acid (HNO₃)
D. Phosphoric acid (H₃PO₄)

The pH of a solution with a hydroxide ion concentration of 1 x 10⁻⁷ M is:

A. 5
B. 7
C. 9
D. 11