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GENERAL CHEMISTRY 1 - EXAM

Total questions: 50

Worksheet time: 52mins

Name
Class
Date
1.

Why are cooking utensils such as saucepans, spoons and others often made of aluminum?   

a)

Aluminum conducts heat efficiently

b)

Aluminum does not corrode readily      

c)

Aluminum is a very light metal

d)

All of the given statements

2.

A material labeled A looks heterogeneous. When water is added a grayish residue was left at the bottom of the baker while the rest dissolved in water. What is the classification of material A?

a)

Colloid

b)

Compound

c)

Element

d)

Mixture

3.

In an experiment, five grams of table salts were dissolved in 100 mL of water. To recover the salt from the solution, what is likely the easiest way to do?

a)

Cool the solution

b)

Distill the solution

c)

Filter the solution

d)

Boil and evaporate the solution

4.

Substance A melts at , boils at  and it is soluble in water. Which of the following methods is most appropriate to separate a mixture of substance A and water?

a)

Crystallization

b)

Decantation

c)

Magnetic Separation

d)

Filtration

5.

Which of the following is the correct electron configuration for a neutral atom that has a Z of 7?

a)

1s22s32p3

b)

1s22s22p3

c)

1s22s12p5

d)

1s22s12p4

6.

Which given pair of chemical formulas and names is CORRECT?

a)

Fe2O3: Iron (II) oxide

b)

BaOH: Barium Hydroxide

c)

Na2CO3: Sodium Carbonate

d)

S2Cl2: Disulfur Dichlorine

7.

Element X has an electron configuration of [Ne] . In what, group, period and sublevel-block of the period table does X belong?

a)

III, 2, s

b)

IIA, 3, p

c)

IVA, 3, p

d)

IVB, 3, s

8.

The table shows the electron configuration of different elements with their groups and periods. Which element has an incorrectly assigned group and period?

a)

D

b)

J

c)

Q

d)

X

9.

Which of the following is the correct electron configuration for a neutral atom that has 15 electrons?

a)

1s22s22p43s23p7

b)

1s22s22p63s23p3

c)

1s22s23s23p63d3

d)

1s22s22p63s23p6

10.

Element Z belongs to group IV, family B, period 5 and a transition metal. Which of the following electron configuration will best represent element ?

a)

1s22s22p63s23p64s23d104p2

b)

1s22s22p63s23p64s23d104p65s2

c)

1s22s22p63s23p64s23d104p65s24d2

d)

1s22s22p63s23p64s23d104p65s24d105p2

11.

How many atoms of aluminum is need to bond with oxygen to form an ionic compound?

a)

1

b)

2

c)

3

d)

4

12.

Which of the following compounds can help in strengthening the tooth enamel?

a)

Potassium Chloride

b)

Sodium Fluoride

c)

Aluminum Oxide

d)

Baking Soda

13.

This toothpaste ingredient has abrasive property.

a)

Sodium pyrophosphate

b)

Xanthan gum

c)

Aluminum Oxide

d)

Glycerol

14.

Which of the following formulas is the empirical formula of tetraphosphorus decoxide, P4O10?

a)

PO2

b)

P2O5

c)

P3O8

d)

P4O10

15.

1.     A gas has a molecular formula N4S4. Which of the following formula is its empirical formula?

a)

NS2

b)

N2S8

c)

NS

d)

N4S4

16.

Benzoyl peroxide, a compound used in treating acne, has a molecular formula C14H10O4 . What is its empirical formula?

a)

C7H5O2

b)

C4H7O

c)

C7HO

d)

CH2O

17.

Melamine, a compound used in manufacturing plastics, has a molecular formula C3H6N6. What is its empirical formula?

a)

CHN

b)

CH2N2

c)

C3H6N6

d)

C2H4N4

18.

Which of the following is a correct molecular formula whose empirical is CH?

a)

C2H6

b)

C6H6

c)

C3H8

d)

C4H8

19.

A gas has an empirical formula NF2, which of the following formulas can be its molecular formula?

a)

N2F4

b)

N6F6

c)

N8F18

d)

N10F22

20.

What is the name of the following ionic compound: RbF

a)

Rubidinate fluoride

b)

Rubidide Fluorine

c)

Rubidium Fluoride

d)

Rubidine Fluorine

21.

What is the name of the following ionic compound: SnS2

a)

Stannic Sulfide

b)

Stannous sulfide

c)

Tin (II) Sulfate

d)

Tin (IV) Sulfite

22.

Which of the following is the formula of auric chloride?

a)

AuCl

b)

AuCl3

c)

Au3Cl

d)

Au2Cl3

23.

What is the name of the following covalent compound?

IF7

a)

Monoidone heptoxide

b)

Iodine heptafluoride 

c)

Indium hexafluoride

d)

Indium hexafluoride

24.

What is the name of the following covalent compound?

SCl4

a)

Sulfur Tetrachloride

b)

Sulfur trichloride

c)

Sulfur pentachloride

d)

Sulfur Hexachloride

25.

What is the name of the following covalent compound?

N4S4

a)

Tetranitrogen Tetrasulfide

b)

Nitrogen tetrasulfide

c)

Dinitrogen trisulfide

d)

Nitrogen sulfide

26.

What is the name of the following covalent compound?

PBr3

a)

Phosphorus Tribromine

b)

Phosphorus Bromine

c)

Phosphorus Tribromide

d)

Triphosphorus bromine

27.

Which of the following is the formula of xenon hexafluoride?

a)

XeF4

b)

XeF6

c)

Xe4F

d)

XeF

28.

Choose the correct molar mass of the following substances.

  Elemental sulfur (S4) (MM of S = 32.07 g/mol)

a)

16.04 g/mol

b)

32.07 g/mol

c)

128.28 g/mol

d)

256.56 g/mol

29.

Choose the correct molar mass of the following substances.

 Potassium peroxydisulfate, K2S2O8 (MM of K= 39.10 g/mol; S = 32.07 g/mol; O =16.00 g/mol)

a)

231.24 g/mol

b)

270.34 g/mol

c)

238.27 g/mol

d)

423.38 g/mol

30.

Choose the correct molar mass of the following substances

Caffeine, C8H10N4O2  (MM of C=12.01 g/mol; H=1.008 g/mol; N=14.01 g/mol; 0 = 16.00 g/mol)

a)

172.20 g/mol

b)

194.20 g/mol

c)

208.20 g/mol

d)

256.20 g/mol

31.

Identify the following property as a physical or chemical.

Volume

a)

Physical

b)

Chemical

32.

Identify the following property as a physical or chemical.

Tendency of metals to tarnish or rust

a)

Physical

b)

Chemical

33.

Identify the following property as a physical or chemical.

Malleability, the ease of a metal to flatten into sheets

a)

Physical

b)

Chemical

34.

Identify the following property as a physical or chemical.

Freezing

a)

Physical

b)

Chemical

35.

Identify the following property as a physical or chemical.

Ease of fruits to ripen

a)

Physical

b)

Chemical

36.

Identify the following property as a physical or chemical.

Ductility, the ability of materials to be stretched into wires

a)

Physical

b)

Chemical

37.

Identify the following property as a physical or chemical.

Reactivity with water

a)

Physical

b)

Chemical

38.

Identify the following property as a physical or chemical.

Volatility, or the ease of which a liquid is converted to its gaseous state

a)

Physical

b)

Chemical

39.

Identify the following property as a physical or chemical.

Hardness of a mineral

a)

Physical

b)

Chemical

40.

Identify the following property as a physical or chemical.

Cytotoxicity, the ability of a substance to cause harm to cells

a)

Physical

b)

Chemical

41.

Choose the BEST method for separating the following mixture.

Coarse and Fine Salt

a)

Magnetic Separation

b)

Distillation

c)

Sifting

d)

Decantation

42.

Choose the BEST method for separating the following mixture.

Water and Gasoline

a)

Magnetic Separation

b)

Sublimation

c)

Sifting

d)

Separating using separatory funnel

43.

Choose the BEST method for separating the following mixture.

Rock and Marbles

a)

Sublimation

b)

Manual Separation

c)

Decantation

d)

Separating using separatory funnel

44.

Choose the BEST method for separating the following mixture.

Blue and Red Food Colors

a)

Centrifugation

b)

Manual Separation

c)

Decantation

d)

Sifting

45.

Choose the BEST method for separating the following mixture.

Water and Soil

a)

Centrifugation

b)

Manual Separation

c)

Decantation

d)

Sifting

46.

Choose the BEST method for separating the following mixture.

Watermelon seeds and Squash seeds

a)

Distillation

b)

Manual Separation

c)

Separation using separatory funnel

d)

Sifting

47.

Choose the BEST method for separating the following mixture.

Chalk dust and water

a)

Distillation

b)

Manual Separation

c)

Separation using separatory funnel

d)

Centrifugation

48.

Choose the BEST method for separating the following mixture.

Water and rubbing alcohol

a)

Distillation

b)

Sublimation

c)

Decantation

d)

Centrifugation

49.

Choose the BEST method for separating the following mixture.

Corn grains and Iron Fillings

a)

Distillation

b)

Magnetic separation

c)

Manual Separation

d)

Centrifugation

50.

Choose the BEST method for separating the following mixture.

Iodine and table salt

a)

Sifting

b)

Sublimation

c)

Manual Separation

d)

Separation using funnel

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