Question 1

Which of the following molecules has a trigonal pyramidal molecular geometry, and what is the expected bond angle for its central atom?

Accepted Answer

NH3; bond angle $$\approx 107^\circ$$

Question 2

Which of the following species is polar due to its molecular geometry and the presence of lone pairs on the central atom?

Accepted Answer

ClF3

Question 3

Which of the following molecules does NOT have a tetrahedral molecular geometry?

Accepted Answer

XeF4

Question 4

How many pi ($$\pi) $$bonds are present in a molecule of carbon dioxide ($$\mathrm{CO_2$}$$)?

Accepted Answer

Two

Question 5

Given the molecule $$\mathrm{H_3C{-}C\equiv CH}$$, what is the hybridization of each carbon atom from left to right?

Accepted Answer

sp$$^3$$, sp, sp

Question 6

How many orbitals are present in a set of sp$$^2$$ hybrid orbitals?

Accepted Answer

Three

Question 7

How many p atomic orbitals are required to generate a set of sp$$^3$$ hybrid orbitals?

Accepted Answer

Three

Question 8

What is the formal charge on the carbon atom in carbon monoxide ($$:\mathrm{C\equiv O:}$$)?

Accepted Answer

-1

Question 9

Which of the following bonds is classified as ionic?

Accepted Answer

CsBr

Question 10

What is the correct formula for nickel(II) perchlorate?

Accepted Answer

Ni(ClO$$_4$$)$$_2$$

Question 11

Determine the molar mass of Fe$$_2(SO$_4$$)$$_3.$$

Accepted Answer

399.9 g/mol

Question 12

How many moles of hydrogen atoms are present in 6.50 g of ammonia ($$\mathrm{NH_3$}$$)? (Molar mass of NH$$_3 = 17.0 g/$$mol)

Accepted Answer

1.14 mol

Question 13

A compound contains 92.3% C and 7.7% H by mass. What is its empirical formula?

Accepted Answer

CH

Question 14

Which element would you expect to have chemical properties most similar to those of sulfur (S)?

Accepted Answer

Se

Question 15

Which of the following elements has the largest atomic radius?

Accepted Answer

S

Question 16

Of the following isoelectronic species, which has the smallest radius?

Accepted Answer

K$$^+$$

Question 17

Which of the following is considered a noble gas?

Accepted Answer

Ne

Question 18

Which of the following is considered a halogen?

Accepted Answer

Cl

Question 19

Which of the following is considered an alkali metal?

Accepted Answer

Li

General Chemistry I Practice Test 2 Study Guidance

Study Guide - Practice Questions