Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Chemical compounds

Total questions: 72

Worksheet time: 36mins

Name
Class
Date
1.
…..elements are the most stable elements
a)
Metals
b)
Non-metals
c)
Nobel gases
d)
Metaloids
2.
All of the folowing elements are monovalent except …..
a)
hydrogen
b)
sodium
c)
oxygen
d)
chlorine
3.
All the following are divalent except…
a)

12Mg_{12}Mg

b)

7N_7N

c)

8O_8O

d)

16S_{16}S

4.
When an atom loses,gains or shares with one electron, whose valency is…
a)
monovalent
b)
divalent
c)
trivalent
d)
tetravalent
5.
When an atom gains or shares by two electron, its valency will be…
a)
monovalent
b)
divalent
c)
trivalent
d)
tetravalent
6.
The valency of ferrous is ….
a)
monovalent
b)
divalent
c)
trivalent
d)
tetravalent
7.
All of the following are nonmetals having more than one valency,except…
a)
copper
b)
phosphorus
c)
sulpher
d)
nitrogen
8.
The valency of argon (18Ar) is….
a)
trivalent
b)
divalent
c)
monovalent
d)
zero
9.
In trivalent elements, the outermost energy level contains….electrons
a)
(3) or (5)
b)
(5) or (6)
c)
(7) or (1)
d)
(6) or (3)
10.

The valency of copper in (Cu2O) is …..

a)

monovalent

b)

divalent

c)

trivalent

d)

tetravalent

11.
The chemical formula of carbonate group is……
a)

NO3−NO_3^-

b)

SO4−−SO4^{--^{ }}

c)

NH4+NH_4^+

d)

CO3−−CO_3^{--^{ }}

12.
All of the following is monovalent atomic group ,except…… group
a)
phosphate
b)
nitrate
c)
hydroxide
d)
bicarbonate
13.
Which of the following is a trivalent atomic group?
a)
Hydroxide
b)
Sulphate
c)
Ammonium
d)
Phosphate
14.
Nitrate and nitrite groups are different in the ……..
a)
type of atoms
b)
number of atoms
c)
valency
d)
type of charge
15.
Phosphate and sulphate group are similar in the ….
a)
type of atoms
b)
valency
c)
number of atoms
d)
kind of atoms
16.
The nitrate group is a …..group
a)
monovalent
b)
divalent
c)
trivalent
d)
tetravalent
17.
All of these atomic groups carry the same charge ,except……
a)
nitrite
b)
nitrate
c)
bicarbonate
d)
ammonium
18.
The molecules of sodium hydroxide, water and sulphoric acid share in presence of ….in each of them
a)
hydrogen and nitrogen
b)
oxygen and sodium
c)
hydrogen and oxygen
d)
hydrogen and sodium
19.

The chemical formula of carbon dioxide (CO2) shows that the valency of carbon is ….

a)

monovalent

b)

divalent

c)

trivalent

d)

tetravalent

20.

Element (M) forms a compound M(OH)3 so, its valency is…….

a)

monovalent

b)

divalent

c)

trivalent

d)

tetravalent

21.
The chemical formula of sodium hydroxide is ……..
a)

NaOH

b)

NaCO3NaCO_{3_{ }}

c)

NaHCO3NaHCO_3

d)

Na2(CO3)2Na_2(CO_3)_2

22.

The chemical formula of sulphoric acid is ……

a)

H2OH_2O

b)

HCl

c)

H2SO4H_2SO_4

d)

HNO3HNO_3

23.
The chemical formula of sodium hydroxide is ……
a)

H2OH_2O

b)

HCl

c)

H2SO4H_2SO_4

d)

NaOH

24.

Each aluminum atom(13Al) combines with …..atoms of chlorine (17Cl) to form aluminum chloride molecule

a)

two

b)

three

c)

four

d)

five

25.
Sulphoric acid is composed of ……
a)
five atoms of three different elements
b)
six atoms of three different elements
c)
seven atoms of three different elements
d)
eight atoms of four different elements
26.
The chemical formula of sodium nitrite is….
a)

NaNO

b)

NaNO3NaNO_3

c)

NaNO2NaNO_2

d)

Na2NO3Na_2NO_3

27.

In ammonia molecule (NH3), the number 3 refers to the number of ……

a)

N & H atoms in one molecule

b)

H atoms in one molecule

c)

the valency of hydroge

d)

N atoms in one molecule

28.

In the compound X(NO3)2, the valency of element (X) is ……

a)

monovalent

b)

divalent

c)

trivalent

d)

tetravalent

29.
The number of atoms in ammonium nitrate molecule equals……
a)
5
b)
7
c)
8
d)
9
30.
When an acid dissolves in water , it produces……ions
a)

OH+OH^+

b)

H−H^-

c)

H+H^+

d)

OH−OH^-

31.
When an alkali (base) dissolves in water, it gives…….ions
a)

OH+OH^+

b)

H−H^-

c)

H+H^+

d)

OH−OH^{-^{ }}

32.
All of these substances turn litmus paper into red, except…..
a)

HCl

b)

HNO3HNO_3

c)

NaOH

d)

H2SO4H_2SO_4

33.
Malak bought a cup of yogurt and found its taste is sour, so she conclude that it contains a compound from…
a)
acids
b)
bases
c)
salts
d)
oxides
34.
All of these substances turn litmus paper into blue,except…...
a)

NaOH

b)

KOH

c)

Ca(OH)2Ca(OH)_2

d)

HBr

35.
All of aqueous solutions of the following compounds have bitter taste,except…...
a)
sodium hydroxide
b)
sulphoric acid
c)
calcium hydroxide
d)
potassium hydroxide
36.
Sodium chloride is ……
a)
an acid
b)
an oxide
c)
a base
d)
a salt
37.
All of these are nonmetal oxid, except….
a)

CO2

b)

P2O5

c)

SO3

d)

Al2O3

38.
The salt that is formed on the combination of positive atomic group with a negative atomic group is ….
a)

NH4Cl

b)

(NH4)2CO3

c)

Na2SO4

d)

NH4Br

39.

On combination of (Mg)+2 ion with ( CO3)-2 group,…..is formed

a)

an acid

b)

a base

c)

a salt

d)

an oxide

40.
The salt that is formed on the combination of positive metal ion with a negative atomic group is ….
a)

NaCl

b)

Na2CO3

c)

(NH4)2SO4

d)

NaBr

41.
Ammonium chloride salt is formed from combination of……
a)
a positive metal ion with a negative atomic group
b)
a positive metal ion with a negative nonmetal ion
c)
a negative nonmetal ion with positive atomic group
d)
a negative nonmetal ion with a negative nonmetal ion
42.
Water molecules consists of four atoms for two elements
a)
Right
b)
Wrong
43.
All of these salts dissolve in water, except…….
a)
sodium chloride
b)
potassium sulphate
c)
silver chloride
d)
sodium sulphate
44.
An element of atomic number 20,so its valency is divalent
a)
Right
b)
Wrong
45.
Ferrous carries three negative charges
a)
Right
b)
Wrong
46.
The chemical formula indicates the type and the number of atoms in a certain molecule
a)
Right
b)
Wrong
47.
Both nitrate and nitrite groups have the same valency
a)
Right
b)
Wrong
48.
The valency of noble gases is monovalent
a)
Right
b)
Wrong
49.
The atomic group acts as a compound in the chemical reaction
a)
Right
b)
Wrong
50.

The Chemical formula of carbonate group is HCO3-

a)

Right

b)

Wrong

51.

In the compound ( XY2), (Y) is divalent and (X) is monovalent

a)

Right

b)

Wrong

52.

A compound (X2O3), so the valency of element (X) is monovalent

a)

Right

b)

Wrong

53.
Both lithium bicarbonate and sodium carbonate have the same number of atoms
a)
Right
b)
Wrong
54.
The molecule of sodium sulphate consists of three different elements
a)
Right
b)
Wrong
55.

(SO2) is the symbol of sodium oxide

a)

Right

b)

Wrong

56.

The chemical formula of aluminum sulphate is Al3(SO4)2

a)

Right

b)

Wrong

57.

The chemical formula of calcium carbonate is (CaCO3)

a)

Right

b)

Wrong

58.
The chemical formula of calcium hydroxide molecule is (CaOH)
a)

Right

b)

Wrong

59.

The chemical formula of nitric acid (HNO3), while that of sulphoric acid is (H2S)

a)

Right

b)

Wrong

60.

The valency of sulpher in sulpher trioxide (SO3) is tetravalent

a)

Right

b)

Wrong

61.
Oxides are substances that dissociate in water produceing positive hydrogen ions
a)
Right
b)
Wrong
62.
Mineral acids are formed when a hydrogen joined with a negative atomic group except nitrate group
a)
Right
b)
Wrong
63.

The chemical formula of silver nitrate is (AgNO3)

a)

Right

b)

Wrong

64.
Sodium hydroxide changes the colour of litmus paper into red
a)
Right
b)
Wrong
65.

The valency of sodium in(NaCl) is monovalent, while it is divalent in (Na2CO3)

a)

Right

b)

Wrong

66.
Table salt is formed of two divalent elements
a)
Right
b)
Wrong
67.

When an element (11Z) combines with oxygen,it produces (ZO) oxide which is a metal oxide

a)

Right

b)

Wrong

68.
Aluminium oxide is a metal oxide,while carbon dioxide is a nonmetal oxide
a)
Right
b)
Wrong
69.
Caustic soda and limewater are from bases,while magnesium carbonate is from salts
a)
Right
b)
Wrong
70.
Silver chloride is water soluble, while sodium chloride is water insoluble
a)
Right
b)
Wrong
71.
The combination of metals with oxygen form oxides,while the combination of metals with nonmetals form bases
a)
Right
b)
Wrong
72.
Sodium chloride is considered a base
a)
Right
b)
Wrong

Similar Resources on Wayground

Body System Review

76 questions

Body System Review

quiz

Worksheet

•

7th Grade

Acids, Bases and the pH Scale BIG QUIZ

74 questions

Acids, Bases and the pH Scale BIG QUIZ

quiz

Worksheet

•

6th - 10th Grade

Units 5,6,7,&8 Review

70 questions

Units 5,6,7,&8 Review

quiz

Worksheet

•

6th - 8th Grade

Yr 8 Physics - Energy Review

70 questions

Yr 8 Physics - Energy Review

quiz

Worksheet

•

7th - 9th Grade

Unit 7 - Investigating Organisms and Environments

71 questions

Unit 7 - Investigating Organisms and Environments

quiz

Worksheet

•

7th Grade

Human Body

68 questions

Human Body

quiz

Worksheet

•

7th Grade

Energy

70 questions

Energy

quiz

Worksheet

•

6th - 8th Grade

Semester Exam Review

70 questions

Semester Exam Review

quiz

Worksheet

•

6th - 8th Grade