$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$$

Question 1

Which of the following statements best describes an atom?

Accepted Answer

An atom is the smallest particle of an element that retains its chemical properties.

Question 2

How many electrons can the second energy level of an atom hold?

Accepted Answer

$$8$$

Question 3

If an atom has an atomic number of $$12$$ and an atomic mass of $$24$$, how many neutrons does it have?

Accepted Answer

$$12$$

Question 4

Which of the following is true about ions?

Accepted Answer

Ions are formed by changing the number of electrons in an atom.

Question 5

Which of the following is an example of a polar covalent bond?

Accepted Answer

Water ($$H_2O)$$

Question 6

What is the main reason water has a high specific heat capacity?

Accepted Answer

Water forms many hydrogen bonds.

Question 7

Which property of water allows it to climb up the inside of a plant stem against gravity?

Accepted Answer

Adhesion

Question 8

A solution is made by dissolving $$10$$ grams of salt in $$100 mL of $$water. In this solution, what is the solvent?

Accepted Answer

Water

Question 9

Which of the following best describes an isotope?

Accepted Answer

Atoms of the same element with different numbers of neutrons.

Question 10

What is the pH of pure water?

Accepted Answer

$$7.0$$

Question 11

Which of the following chemical equations correctly represents cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 12

Which of the following is a correct statement about the atomic number?

Accepted Answer

It is equal to the number of protons in the nucleus.

Question 13

What type of bond is formed when electrons are transferred from one atom to another?

Accepted Answer

Ionic bond

Question 14

Which of the following is NOT a property of water?

Accepted Answer

Nonpolar molecule

Question 15

If a sodium atom ($$Na) $$has an atomic number of $$11$$ and forms a $$Na^+$$ ion, how many electrons does it have?

Accepted Answer

$$10$$

Question 16

Which of the following best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water is polar and can surround charged ions, separating them.

Question 17

Which of the following is true about the electrons in a covalent bond?

Accepted Answer

Electrons are shared between atoms.

Question 18

A molecule of $$O_2 is $$held together by which type of bond?

Accepted Answer

Covalent bond

Question 19

Which of the following is a result of water's polarity?

Accepted Answer

Water can form hydrogen bonds with other water molecules.

Question 20

What is the effect of adding $$HCl to $$water?

Accepted Answer

It increases the concentration of $$H^+$$ ions.

Basic Chemistry Concepts for General Chemistry

Study Guide - Practice Questions