Smells Unit 1 Test 2013-2014

Multiple Choice: Identify the choice that best completes answers the question.

____1.What pattern in the data would not be helpful when trying to predict the smell of an unknown compound.

a) / There is a yl in some of the names / c) / The minty compounds have 10 carbon atoms
b) / The sweet ones have ate suffixes in their names / d) / The sweet ones have twice as many hydrogens as carbons

____2.Given the smell data in the previous question, what smell would you predict for C6H15N

a) / fishy / c) / minty
b) / sweet / d) / putrid

____3.A double line between two atoms represents ______electron(s) or _____ pair(s) of electrons.

a) / 1, 1 / c) / 4, 2
b) / 2, 1 / d) / 6, 3

____4.What is the correct molecular formula for the structure shown below?

a) / (CO)3H8 / c) / (COH)3H5
b) / CHO / d) / C3H8O3

____5.The structure below has ____ lone pairs of electrons.

a) / 2 / c) / 11
b) / 8 / d) / 13

____6.The structure below has _____ bonded pairs of electrons.

a) / 2 / c) / 5
b) / 4 / d) / 6

____7.The structures below are isomers of the molecule C3H4O2 - which one is NOT correctly drawn?

a) / a / c) / c
b) / b / d) / d

____8.What is wrong with the following structure?

a) / oxygen has more than an octet / c) / nitrogen does not have an octet
b) / hydrogen does not have an octet / d) / there is nothing wrong

____9.What is wrong with the following structure?

a) / fluorine has too many valence electrons / c) / the second carbon should have a lone pair instead of a double bond to oxygen
b) / the top oxygen has more than an octet / d) / nothing is wrong

____10.What is wrong with the structure below?

a) / the second carbon has too many bonds / c) / the top oxygen has too many bonds
b) / the oxygen next to the hydrogen needs an octet / d) / nothing is wrong

____11.What is wrong with the following structure?

a) / the oxygen should be always be bonded to a hydrogen / c) / replacing the N=N double bond with a single bond will make it correct
b) / the second nitrogen has too many bonds / d) / there is nothing wrong

____12.Which structures are NOT isomers of each other?

a) / A and B / c) / A and D
b) / A and C / d) / C and D

____13.What types of bonds are formed when two nonmetals join together?

a) / ionic / c) / network covalent
b) / metallic / d) / moleular covalent

____14.Which atoms are most likely to form covalent bonds?

a) / metal atoms that share electrons / c) / metal atoms that share protons
b) / nonmetal atoms that share electrons / d) / nonmetal atoms that share protons

____15.Which pair of atoms will share electrons when a bond is formed between them?

a) / K and Cl / c) / Ba and I
b) / O and F / d) / Li and N

____16.The correct Lewis dot structure for HCl is ___.

a) / / c) /
b) / / d) /

____17.Which of the following forms a molecule?

a) / KCl / c) / SO2
b) / CaO / d) / all of them

____18.Which of the following is a correct structure for HCN?

a) / / c) /
b) / / d) /

____19.Which of the following is not a valid structure?

a) / A / c) / C
b) / B / d) / D

____20.In drawing a molecular structure, a single line between two atoms represents:

a) / a shared electron / c) / an octet of electrons
b) / a shared pair of electrons / d) / an unshared pair of electrons

____21.Which of the following structures represents ethylene, C2H4?

a) / A / c) / C
b) / B / d) / D

____22.Which of the following represents a correct structure for methanol, CH4O?

a) / A / c) / C
b) / B / d) / D

Short Answer

23.Write the molecular formula for the following structure ______.

24.Draw either the Lewis dot or the structural formula (with lone pairs) for CH2I2.

.

25.Draw either the Lewis dot or the structural formula (with lone pairs) for P2H2.

.

26.Draw 2 isomers of C4H11N

.

Smells Unit 1 Test 2013-2014

Answer Section

MULTIPLE CHOICE

1.ANS:APTS:1

2.ANS:APTS:1

3.ANS:CPTS:1

4.ANS:DPTS:1

5.ANS:APTS:1

6.ANS:CPTS:1

7.ANS:DPTS:1

8.ANS:CPTS:1

9.ANS:DPTS:1

10.ANS:APTS:1

11.ANS:BPTS:1

12.ANS:BPTS:1

13.ANS:DPTS:1

14.ANS:BPTS:1

15.ANS:BPTS:1

16.ANS:CPTS:1

17.ANS:CPTS:1

18.ANS:CPTS:1

19.ANS:APTS:1

20.ANS:BPTS:1

21.ANS:DPTS:1

22.ANS:APTS:1

SHORT ANSWER

23.ANS:

C4H10O

PTS:1

24.ANS:

.

PTS:1

25.ANS:

.

PTS:1

26.ANS:

H H H H H H H H H H

H-C-C-N-C-C-HH-C-C-C-C-C-N

H H H H H H H H H H H

PTS:1