Master Chemistry Fundamentals for Biotechnology: Basic Concepts Quiz

Question 1

Which element among the given options possesses the greatest electronegativity?

Accepted Answer

Chlorine

Answer

Sodium

Answer

Potassium

Question 2

An element with atomic number 17 has how many valence electrons?

Accepted Answer

Seven

Answer

One

Answer

Seventeen

Answer

Ten

Question 3

Which bond involves the sharing of electrons between atoms?

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Hydrogen bond

Answer

Metallic bond

Question 4

Determine the oxidation number of nitrogen in NH3.

Accepted Answer

-3

Answer

-2

Answer

0

Answer

+3

Question 5

Which of these is considered a strong acid?

Accepted Answer

Hydrochloric acid

Answer

Acetic acid

Answer

Citric acid

Answer

Carbonic acid

Question 6

Define the hybridization of the carbon atom in methane (CH4).

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 7

Which element is classified as a transition metal?

Accepted Answer

Iron

Answer

Sodium

Answer

Chlorine

Answer

Oxygen

Question 8

Which solution has the highest solute concentration?

Accepted Answer

0.4 M NaOH

Answer

0.1 M NaCl

Answer

0.2 M KCl

Answer

0.3 M NH4OH

Question 9

In an atom, which subatomic particle carries a positive charge?

Accepted Answer

Proton

Answer

Neutron

Answer

Electron

Question 10

In a chemical bond where electrons are shared between atoms, what is this type of bond called?

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Metallic bond

Question 11

Acids are characterized by which property?

Accepted Answer

Donating protons (H+)

Answer

Accepts protons (H+)

Question 12

Which type of chemical reaction involves the breakdown of chemical bonds in reactants?

Accepted Answer

Decomposition reaction

Answer

Synthesis reaction

Answer

Single displacement reaction

Question 13

A buffer solution is defined as:

Accepted Answer

A solution that resists pH changes upon addition of small amounts of acid or base

Answer

A solution with a pH of 7

Question 14

Which of the following is a strong electrolyte?

Accepted Answer

NaCl

Answer

CH3OH

Answer

C6H12O6

Question 15

Which type of molecule lacks polarity?

Accepted Answer

CH4

Answer

H2O

Answer

NaCl

Question 16

The correct Lewis structure for water is:

Accepted Answer

:O-H-O:

Question 17

Which gas contributes to the greenhouse effect?

Accepted Answer

CO2

Answer

O2

Answer

N2

Question 18

Which particle is NOT a fundamental building block of an atom?

Accepted Answer

Quark

Answer

Proton

Answer

Neutron

Answer

Electron

Question 19

Which particle is NOT a fundamental component of an atom?

Accepted Answer

Photon

Answer

Proton

Answer

Electron

Answer

Neutron

Question 20

When atoms contribute electrons to form a chemical bond, what type of bond is formed?

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 21

Which type of reaction involves a change in oxidation states of the reactants?

Accepted Answer

Combustion reaction

Answer

Neutralization reaction

Answer

Precipitation reaction

Answer

Hydrolysis reaction

Question 22

Which intermolecular force is the weakest?

Accepted Answer

London dispersion force

Answer

Dipole-dipole interaction

Answer

Hydrogen bond

Answer

Ion-dipole interaction

Question 23

What is the hybridization of the central carbon atom in methane (CH4)?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 24

Which combination forms a buffer solution?

Accepted Answer

Weak acid and its conjugate base

Answer

Pure water

Answer

Strong acid

Answer

Strong base

Question 25

Which species acts as a reducing agent?

Accepted Answer

Sodium metal

Answer

Oxygen

Answer

Hydrogen ion

Answer

Potassium permanganate

Question 26

Write the rate law for a reaction that proceeds with a first-order dependence on reactant A and a second-order dependence on reactant B.

Accepted Answer

Rate = k[A][B]^2

Answer

Rate = k[A][B]

Answer

Rate = k[A]^2[B]

Answer

Rate = k[A]^2[B]^2