Question 1

Which of the following best describes a key principle of green chemistry?

Accepted Answer

Designing chemical products and processes that reduce or eliminate the use and generation of hazardous substances.

Question 2

Which of the following is a chemical property?

Accepted Answer

Reactivity with oxygen

Question 3

According to Dalton’s atomic theory, which statement is correct?

Accepted Answer

Atoms of the same element are identical in mass and properties.

Question 4

Which subatomic particle determines the identity of an element?

Accepted Answer

Proton

Question 5

Which of the following best explains why ionic compounds tend to have high melting points?

Accepted Answer

They consist of ions held together by strong electrostatic forces.

Question 6

Which of the following is the correct electron configuration for a neutral atom of sodium ($$Z = 11$$)?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^1$$

Question 7

Which of the following elements has the highest electronegativity?

Accepted Answer

Fluorine

Question 8

A sample contains $$0.5$$ moles of $$\mathrm{NaCl}. $$What is the mass of the sample? ($$\mathrm{Na} = 23.0\ \mathrm{g/mol}$$, $$\mathrm{Cl} = 35.5\ \mathrm{g/mol})$$

Accepted Answer

$$29.25\ \mathrm{g}$$

Question 9

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electron pairs between atoms.

Question 10

Which of the following molecules exhibits hydrogen bonding?

Accepted Answer

$$\mathrm{H_2O}$$

Question 11

A gas occupies $$4.0\ \mathrm{L} at$$ $$2.0\ \mathrm{atm}$$ and $$300\ \mathrm{K}. $$What volume will it occupy at $$1.0\ \mathrm{atm}$$ and $$300\ \mathrm{K}$$? (Assume ideal gas behavior.)

Accepted Answer

$$8.0\ \mathrm{L}$$

Question 12

Which of the following statements about dispersion forces is correct?

Accepted Answer

They arise from temporary fluctuations in electron distribution.

Question 13

Which of the following best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water because its molecules are arranged in an open hexagonal structure.

Question 14

Which of the following is a correct application of the law of conservation of mass?

Accepted Answer

The total mass of reactants equals the total mass of products in a chemical reaction.

Question 15

Which of the following best describes a dipole-dipole interaction?

Accepted Answer

An attraction between the positive end of one polar molecule and the negative end of another.

Question 16

Which of the following is the correct formula for calculating the number of moles from mass and molar mass?

Accepted Answer

$$n = \frac{m}{M}$$

Question 17

Which of the following best explains why metals are good conductors of electricity?

Accepted Answer

Metals have delocalized electrons that can move freely throughout the structure.

Question 18

Which of the following is the correct expression for the ideal gas law?

Accepted Answer

$$PV = nRT$$

Question 19

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have similar chemical properties.

Question 20

Which of the following best describes the difference between a physical and a chemical change?

Accepted Answer

A chemical change alters the identity of the substance.

General Chemistry Exam 1 Review Guide: Key Concepts and Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards