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Grade 10 Chemistry Mid Term Revision

Total questions: 63

Worksheet time: 57mins

Name
Class
Date
1.

Predict the charge of the ion formed by each of the following elements.


Ca - Calcium

a)

1+

b)

2-

c)

3+

d)

2+

2.

Predict the charge of the ion formed by each of the following elements.


N - Nitrogen

a)

5+

b)

2+

c)

3-

d)

3+

3.

Which Group in the periodic table would have an an ion of a -2 charge?

4 lines
4.

Which Group contains an element that will lose 3 electrons to become stable?

a)

3A

b)

4A

c)

5A

d)

6A

5.

What does an -ite or -ate ending in a polyatomic ion mean?

a)

Oxygen is in the formula.

b)

Sulfur is in the formula.

c)

Nitrogen is in the formula.

d)

Bromine is in the formula.

6.

An -ate or -ite at the end of a compound name usually indicates that the compound contains

a)

fewer electrons than protons.

b)

neutral molecules.

c)

only two elements.

d)

a polyatomic anion.

7.

Which of the following correctly provides the names and formulas of polyatomic ions?

a)

carbonate: HCO3 ; bicarbonate: CO32-

b)

nitrite: NO-; nitrate: NO2-

c)

sulfite: S2- ; sulfate: SO3-

d)

chromate: CrO42-; dichromate: Cr2O72-

8.
NH4+
a)
nitrogen hydride
b)
ammonium
9.
CN-
a)
cyanide
b)
carbon nitride
10.
SO42-
a)
sulfate
b)
sulfite
11.

Write the formula for dichromate ion.

a)

Cr2O72-

b)

Cr2O73-

c)

CrO42-

12.

What is the correct formula for the polyatomic ion called sulphate?

a)

SO32–

b)

HSO4–

c)

SO42–

d)

CH3COO–

13.

A ..................... ion is composed of more than one atom and behaves as a unit and carries a charge.

a)

Monoatomic

b)

diatomic

c)

polyatomic

14.

The chemical formula of a Chlorate ion is ClO32-, what is the chemical formula of a chlorite ion

a)

ClO42-

b)

ClO2-

c)

ClO22-

d)

ClO52-

15.

What subscripts to write the correct formula for magnesium nitride.

a)

2;3

b)

2;2

c)

3;2

d)

1;2

16.
What is the formula for manganese(III) oxide?
a)
MgO
b)
Mg2O3
c)
MnO
d)
Mn2O3
17.

Subscripts to write the correct formula for aluminum oxide are

a)

2;3

b)

3;2

c)

3;3

d)

1;1

18.

The ratios of atoms in the chemical formula of an ionic compound must always be in the lowest ratio

a)

True

b)

False

19.

What is the chemical name for the following chemical compound ----- CaO

a)

Calcium (II) Oxide

b)

Calcium Oxygen

c)

Calcium Oxide

d)

Calcide Oxygen

20.

Which set of chemical name and chemical formula for the same compound is correct?

a)

Iron(II) oxide, Fe2O3

b)

Aluminum fluorate, AlF3

c)

Tin(IV) bromide, SnBr4

d)

potassium chloride, K2Cl2

21.

Which of the following compounds contains the lead(II) ion?

a)

PbO

b)

PbCl4

c)

Pb2O

d)

Pb2S

22.

Which of the following is the chemical formula of beryllium Chloride


(Hint: use the periodic table and the skills taught)

a)

BeCl

b)

Be2Cl

c)

BeCl2

23.

Name the following ionic compound


SnS2

a)

Tin (II) Sulfide

b)

Tin Sulfide

c)

Tin (IV) Sulfide

d)

Tin (II) Sulfur

24.
When naming ionic compounds with transition metals you need to include roman numerals to show the _____ of the metal..
a)
atomic number
b)
mass number
c)
charge
d)
ionization energy
25.
The formula of calcium phosphate is 
a)
CaPO4
b)
Ca2(PO4)3
c)
Ca3PO4
d)
Ca3(PO4)2
26.
The chemical compound for sodium phosphate would be:
a)
NaPO4
b)
Na2PO4
c)
Na3PO4
d)
Na(PO4)3
27.

Which of the following is the chemical formula for the Lithium Phosphate

a)

LiPO4

b)

Li2PO4

c)

Li(PO4)2

d)

Li(PO4)2

28.

Which of the following is the chemical formula for Copper(II)Phosphate

a)

Cu2(PO4)

b)

CuPO3

c)

CuPO4

29.

Which of the following is the chemical formula for the ionic compound Chromium(III) Nitrite

a)

CrNO3

b)

Cr(NO3)2

c)

Cr2NO3

d)

CrN

30.
What is the correct name for SO₂?
a)
Sulfur oxide
b)
Sulfite
c)
Sulfur dioxide
d)
Sulfur II Oxide
31.
The name of P₄S₁₀ is
a)
phosphorous sulfide
b)
phosphorus sulfide
c)
tetraphosphorus decasulfide
d)
phosphorus (X) sulfide
32.
The name of SO₃ compound is
a)
sulfate
b)
sulfur oxide
c)
sulfur trioxide
d)
monosulfur trioxide
33.

What is the chemical name for H2O

a)

Hydrogen Oxide

b)

Oxygen Dinitride

c)

Water

d)

Dihydrogen Monoxide

34.
What is the correct name for NO?
a)
Mononitrogen Monoxide
b)
Nitrogen Monoxide
c)
Mononitrogen Dioxide
d)
Nitrogen Oxide
35.
silicon dioxide
a)
SO2
b)
NaO2
c)
SiO2
d)
SiO
36.
SiCl4
a)
silicon tetrachloride
b)
silicon quadchloride
c)
monosilicon tetrachloride
d)
silicon chloride
37.
The name of P₄S₁₀ is
a)
phosphorous sulfide
b)
phosphorus sulfide
c)
tetraphosphorus decasulfide
d)
phosphorus (X) sulfide
38.

What is the chemical name for H2O

a)

Hydrogen Oxide

b)

Oxygen Dinitride

c)

Water

d)

Dihydrogen Monoxide

39.

How many moles of magnesium is 2.5 x 1023 atoms of magnesium?

a)

0.208 mole

b)

0.416 mole

c)

0.104 mole

40.
What is the mole used for? 
a)
To measure the amount of grams in a substance
b)
To measure the amount of atoms or molecules in a substance
c)
To measure the amount of energy in a substance
d)
To measure the amount of bonding in a substance 
41.
What is Avogadro's Number? 
a)
6.02 x 1023
b)
- 6.02 1023
c)
6.02 x 1022
d)
6,020,000,000,000
42.

Calculate the number of moles of each element, given the number of atoms

(a)  

43.

Calculate the number of moles of each element, given the number of atoms

a)

1547.4 moles

b)

1.547 moles

c)

0.646 moles

44.

How many moles are in 4.5x1024 particles?

a)

0.747 particles

b)

7.47 mol

c)

2.71x1047 mol

d)

2.71x1047 particles

45.

How many moles are in 2.80 x 1024 atoms of silicon

a)

4.65 moles

b)

9.0 moles

c)

2.15 moles

d)

5 moles

46.
How many atoms are in 1.50 moles of Hg?
a)
9.03x1023 atoms Hg
b)
9.03x1024 atoms Hg
c)
903 atoms of Hg
d)
9.03 atoms of Hg
47.

Calculate the molar mass of NH4NO2

a)

50 g/mol

b)

60 g/mol

c)

64 g/mol

d)

78 g/mol

48.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
49.

What id the molar mass of UF6?

a)

101 g/mol

b)

238 g/mol

c)

257 g/mol

d)

352 g/mol

50.

A mass of 6 g of Carbon contains

a)

1 mole of C

b)

2 moles of C

c)

0.5 moles of C

d)

72 moles of C

51.
Determine the mass of 4.20 moles of C6H12 (Gram formula mass = 84.2 g/mole)
a)
354 g
b)
84 g
c)
337 g
d)
421 g
52.
How many grams are in 3.3 mol of potassium sulfide (K2S)? (Gram formula mass = 110.26 g/mole)
a)
363.9 g
b)
454.2 g
c)
238.6 g
d)
132.0 g
53.

Fun Fact: some people think that air is a synonym for oxygen, but it is actually 78% nitrogen and only 21% oxygen.


If you have a large balloon filled with 6.0 L of nitrogen at STP, how many moles of N2 are in that balloon?

a)

0.51 moles

b)

0.44 moles

c)

0.27 moles

d)

0.19 moles

54.

At STP, how many moles are in 62.4 Liters of Ammonia gas

a)

0.359 mol

b)

1398 mol

c)

2.8 mol

d)

1.28 mol

55.

At STP, 1 mol of gas has a volume of

a)

34L

b)

22.4L

c)

60L

d)

0.6L

56.

At STP, how many moles are in 62.4 Liters of Ammonia gas

a)

0.359 mol

b)

1398 mol

c)

2.8 mol

d)

1.28 mol

57.

The density of a gaseous compound is found to be 0.982 g/L at STP. What is the molar mass of the compound?

a)

22

b)

44

c)

33

58.

Usually the density of a gas is measured in grams per liter (g/L) and at a specific temperature

a)

True

b)

False

59.

The density of an elemental gas was found to be 1.7824g/L at STP, which of the following was the gas

a)

39.9g/mol

b)

12.56g/mol

c)

0.079g/mol

60.

A noble gas was found to have a density of 1.78129g/L, what is the identity of this unknown noble gas

a)

Helium

b)

Krypton

c)

Argon

d)

Potassium

61.

What is the volume of 20g of CO2

(a)  

62.

What is the volume of 18.9g of O2

(a)  

63.

What is the volume of 285g of CH4 gas at STP

(a)  

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