wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Chemistry 1A Exam Buster 2021 T1

Total questions: 45

Worksheet time: 23mins

Name
Class
Date
1.

All of these are homogeneous mixtures except?

a)

AgCl precipitate

b)

Brass (Cu3Zn3)

c)

Aqueous KOH

d)

None of the above

2.

What is the symbol for Iron?

a)

Ir

b)

I

c)

Fe

d)

In

3.

Which of the following is an element?

a)

C

b)

CO2

c)

N2

d)

H2O

4.

Which of the following is a chemical change?

a)

Crumpling a sheet of aluminium foil

b)

Rusting of iron

c)

Freezing liquid mercury

d)

Shredding paper

5.

Which of the following compounds is insoluble?

a)

NaCl

b)

NaCO3

c)

KI

d)

PbI

6.

What is the systematic name of Na2O?

a)

Disodium(I) oxide

b)

Disodium oxide

c)

Sodium oxide

d)

Sodium (I) oxide

7.

How many molecules are in 1 mole of CO2?

a)

6.2 x 1023

b)

6.02 x 1023

c)

6.2 x 1024

d)

1.806 x 1024

8.

What is the molarity of 20g of NaCl in 2000mL of solution?

a)

0.08 M

b)

0.17 mol/L

c)

5 moles

d)

58.44 mol/mL

9.

What is the oxidation number of chromium in CaCr2O7?

a)

+6

b)

0

c)

+7

d)

+5

10.

Calculate the number of moles in 27g of CO2

a)

0.61

b)

27.0

c)

44

d)

61

11.

Which of the following atoms has the highest electronegativity?

a)

O

b)

F

c)

He

d)

Ge

12.

Which is the correct balanced equation?

a)

N2 + 3H2 → 2NH3

b)

N2 + H2 → NH3

c)

2N2 + 6H2 → 2NH3

d)

None of the above

13.

True or false: Fluorine tends to form cation

a)

True

b)

False

14.

Consider the following equation:

Al2(SO4)3 + 6KNO3 → 3K2SO4 + 2Al(NO3)3

If I have 2 moles of Al2(SO4)3 and 11 moles of 6KNO3, what is the limiting reagent?

a)

Aluminium sulfate

b)

Aluminium nitrate

c)

Potassium sulfate

d)

Potassium nitrate

15.

Each group in the periodic table contains elements with the same number of:

a)

Protons

b)

Electrons

c)

Neutrons

d)

Valence electrons

16.

Which one of the following ions has the largest atomic radius?

a)

Na+

b)

Li+

c)

Se2-

d)

O2-

17.

Which of the following quantum number sets is unacceptable?

a)

n = 4; l = 1, ml = -1; ms = +1/2

b)

n = 3; l = 0, ml = 0; ms = -1/2

c)

n = 3; l = 1, ml = 0; ms = +1/2

d)

n = 2; l = 0, ml = -1; ms = -1/2

18.

What is a covalent bond made up of?

a)

Two metals

b)

A metal and a non-metal

c)

Two non-metals

d)

A and C

19.

Which of the following quantum numbers is indicated by the symbol n?

a)

Principal quantum number

b)

Angular momentum quantum number

c)

Magnetic quantum number

d)

Electron spin quantum number

20.

The correct electron configuration for the bromide ion Br- is:

a)

[Ar] 4s24p5

b)

[Ar] 4s23d104p5

c)

[Ar] 4s23d104p6

d)

[Ar] 4s23d104p65s1

21.

Which molecule has the largest dipole moment?

a)

CH4

b)

NH3

c)

CO2

d)

NF3

22.

What is the formal charge of N in NO22-?

a)

0

b)

+1

c)

-1

d)

-2

23.

What is the geometry of NH3?

a)

Bent

b)

Trigonal planar

c)

Trigonal pyramidal

d)

Tetrahedral

24.

What is the hybridisation of carbon in CH3?

a)

sp

b)

sp2

c)

sp3

d)

sp4

25.

Which is the correct Lewis structure for CO2?

a)

a

b)

b

c)

c

d)

d

26.

Which of the following is paramagnetic?

a)

O2

b)

N2

c)

C2

d)

F2

27.

Determine the bond order (BO) and number of unpaired electrons for F2 and F2+

a)

F2: BO = 1, # of unpaired electrons = 1; F2+: BO= 1, # of unpaired electrons = 0

b)

F2: BO = 1.5, # of unpaired electrons = 1; F2+: BO= 1, # of unpaired electrons = 1

c)

a.F2: BO = 1, # of unpaired electrons = 0 = 1; F2+: BO= 1.5, # of unpaired electrons =1

d)

F2: BO = 1, # of unpaired electrons = 0; F2+: BO= 1.5, # of unpaired electrons = 0

28.

How many pi and sigma bonds are in the following molecule?

a)

7 sigma bonds, 3 pi bonds

b)

8 sigma bonds, 2 pi bonds

c)

5 sigma bonds, 5 pi bonds

d)

7 sigma bonds, 2 pi bonds

29.

Which of the following is incorrect regarding intermolecular forces?

a)

Intermolecular forces influence state properties

b)

Intermolecular forces exist between molecules but also as atoms and ions

c)

Intermolecular forces reply on attractions between positively charged and negatively charged regions of molecules

d)

Intermolecular forces occur in covalent compounds

30.

Using the following phase diagram for CO2, what is the phase at -30℃ and 2000 kPa?

a)

Solid

b)

Liquid

c)

Gas

d)

SCF

31.

A 2.50 L volume of hydrogen measured at -196℃ is warmed to 100.0℃. Calculate the volume of the gas at the higher temperature, assuming no change in pressure.

a)

12.1 L

b)

12.09 L

c)

51. 6 L

d)

0.51 L

32.

If I initially gave 1.82 moles of a gas in a steel vessel of volume 5.43 L at 69.5℃, and I then heat it to 100℃, what has been the change in pressure (kPa)?

a)

9.42 Pa

b)

10.26 atm

c)

0.84 atm

d)

85.0 kPa

33.

Using the following phase diagram, at approximately what temperature and pressure is the triple point?

a)

-70℃, 100 kPa

b)

-50℃, 10 kPa

c)

-70K, 100 atm

d)

-50K, 10 atm

34.

Identify the least soluble compound

a)

CaSO4: Ksp = 2.4 x 10-5

b)

AgBr: Ksp = 7.7 x 10-13

c)

PbCl2: Ksp = 2.4 x 10-4

d)

Mg(OH)2: Ksp = 1.2 x 10-11

35.

What mass of KOH would have to be dissolved in 500.0 g of water to prepare a solution of molality 0.200 mol kg-1?

a)

7.12 x 10-2 g

b)

7.12 x 10-6 g

c)

5.61 g

d)

5610 g

36.

Which of the following are colligative properties of solutions?

a)

Vapour pressure lowering

b)

Boiling point elevation

c)

Osmotic pressure

d)

All of the above

37.

Calculate the vapour pressure of a solution made by dissolving 50.0 g of C6H12O6 in 500.0 g of water. The vapour pressure of pure water is 101.325 kPa at 25℃.

a)

100 kPa

b)

101 kPa

c)

100.0 x 102 kPa

d)

101.3 x 102 kPa

38.

Estimate the freezing point of a solution made from 10.00g of urea (CO(NH2)2) in 100.0g of water. The molal freezing point depression constant of CO(NH2)2 is 1.86 K mol-1 kg

a)

-3.10℃

b)

3.10℃

c)

3.0969℃

d)

-3.0969℃

39.

Calculate the enthalpy for this reaction:

2C(s) + H2(g) -> C2H2(g)

Given the following thermochemical equations:

C2H2(g) + 5/2 O2(g) -> 2CO2(g) + H2O(l) ΔH°=-1299.5 kJ

C(s) + O2(g) -> CO2(g) ΔH°=-393.5 kJ

H2(g) + 1/2 O2(g) -> H2O(l) ΔH°=-286.8 kJ

a)

-225.7 kJ

b)

+598 kJ

c)

-598 kJ

d)

+225.7 kJ

40.

What is the correct definition of endothermic?

a)

Thermal energy transfer from the surroundings to the system

b)

Thermal energy transfer from the system to the surroundings

c)

Thermal energy transfer within the system

d)

Thermal energy transfer in the universe

41.

Calculate Ksp for Ca(OH)2 at this temperature

a)

7.81 x 10-6

b)

1.98 x 10-2 mol L-1

c)

0.0198 mol L-1

d)

1.47

42.

Which of these compounds has the highest ΔS at 25℃?

a)

CH3OH(s)

b)

CH3OH(l)

c)

CH3OH(g)

d)

C(s)

43.

7.0 moles of helium gas, 1.0 mole of oxygen gas and 2.0 mole of fluorine gas are in a container. The total pressure is 4 atm. Assuming fixed volume and temperature, the partial pressure of helium is:

a)

0.28 atm

b)

0.280 atm

c)

2.90 atm

d)

2.8 atm

44.

Which of the following compounds would have the lowest freezing point? Assume they are all at the same concentration

a)

NaCl

b)

C6H12O6

c)

CaI2

d)

H2O

45.

Entropy will usually increase when:

I. A molecule is broken into two or more smaller molecules

II. A reaction occurs that results in an increase in the number of moles of gas

III. A liquid changes to solid

IV. A liquids changes to gas

a)

I and II

b)

III only

c)

I, II and IV

d)

I, II, III, IV

Similar Resources on Wayground

Elements, Compounds, and Mixtures

45 questions

Elements, Compounds, and Mixtures

quiz

Worksheet

•

KG - University

Unit 6: Chemical Reaction Review

45 questions

Unit 6: Chemical Reaction Review

quiz

Worksheet

•

11th Grade - University

KUIS IPAS

40 questions

KUIS IPAS

quiz

Worksheet

•

3rd Grade - University

مراجعة فصل الالكترونات في الذرات

42 questions

مراجعة فصل الالكترونات في الذرات

quiz

Worksheet

•

University

ÔN THI HKI HÓA 10

50 questions

ÔN THI HKI HÓA 10

quiz

Worksheet

•

10th Grade - University

Ôn Tập cuối kì 1 Hóa 10

43 questions

Ôn Tập cuối kì 1 Hóa 10

quiz

Worksheet

•

10th Grade - University

Ôn tập PU OXH-KH số 1-10A

40 questions

Ôn tập PU OXH-KH số 1-10A

quiz

Worksheet

•

10th Grade - University

ELEMENTOS (s y p) DE LA TABLA PERIODICA

45 questions

ELEMENTOS (s y p) DE LA TABLA PERIODICA

quiz

Worksheet

•

9th Grade - University