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Chemistry Basics With HM

Total questions: 50

Worksheet time: 33mins

Name
Class
Date
1.

When the materials in the mixture cannot be recognized from one another it is called _______.

a)

Heterogeneous mixture

b)

Homogeneous Mixture

c)

Insoluble

d)

Soluble

2.

The valency of Sulphate

a)

1

b)

2

c)

3

d)

4

3.
This image is a close up of a water molecule in a glass of water. How many water molecules do you see?
a)
Less than 2
b)
Between 4 and 8
c)
More than 12
4.
What is the total number of atoms in this molecule?
a)
11
b)
3
c)
8
d)
10
5.
What is the total number of atoms in this molecule?
a)
2
b)
4
c)
1
d)
6
6.

The formula of Ammonium radical

a)

NH3

b)

NH2

c)

NH4

d)

N

7.
What is the best statement for the picture. 
a)
Propane has three carbon atoms and eight hydrogen atoms.
b)
Propane has three carbon atoms and six hydrogen molecules.
c)
Propane has three carbon atoms.
8.
What is the best formula for this molecule?
a)
2H2O2
b)
6H2O2
c)
6H12O12
d)
6HO
9.
What is the total number of atoms in this molecule?
a)
10
b)
5
c)
15
d)
20
10.

Mention the valency of Chloride

a)

1

b)

2

c)

3

d)

4

11.

Name of the radical PO4

a)

Phosphorus

b)

Phosphite

c)

Phosphate

d)

Phosphide

12.

What is a homogeneous mixture?

a)

Consists of two or more substance mixed together.

b)

It is a mixture in which you cannot identify its components easily.

c)

It is a mixture in which you can identify its components easily.

13.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
14.

Zinc

a)

Z

b)

Zi

c)

ZN

d)

Zn

15.

The valency of Carbonate

a)

1

b)

2

c)

3

d)

4

16.

The valency of Sulphate

a)

1

b)

2

c)

3

d)

4

17.

The formula of Ammonium radical

a)

NH3

b)

NH2

c)

NH4

d)

N

18.

Name of the radical PO4

a)

Phosphorus

b)

Phosphite

c)

Phosphate

d)

Phosphide

19.

Mention the valency of Chloride

a)

1

b)

2

c)

3

d)

4

20.

Mention the symbols of Potassium

a)

P

b)

Po

c)

K

d)

Kt

21.

Name the symbol of hydroxide

a)

O

b)

H

c)

HO

d)

OH

22.

Mention the valency of Sodium

a)

0

b)

1

c)

2

d)

3

23.

FORMULAE FOR COPPER (II) SULPHATE

a)

CuS

b)

CuSO3

c)

CuSO4

d)

Cu2SO4

24.

WHAT IS THE NAME OF THE FOLLOWING COMPOUND Fe2(SO4)3

a)

FERROUS SULPHATE

b)

IRON (II) SULPHATE

c)

FERRIC SULPHATE

d)

FERROUS (II) SULPHATE

25.

Which of the following element exhibits variable valency

a)

C

b)

N

c)

Na

d)

Mg

26.

The formula for magnesium phosphate

a)

Mg3PO4

b)

Mg3(PO4)2

c)

MgPO4

d)

Mg2PO4

27.

The lower valency of iron is termed

a)

ferrous

b)

ferric

c)

ferroferric

d)

ferricferro

28.

The chemical formulae for calcium hydroxide

a)

Ca(OH)2

b)

CaOH

c)

Ca2OH

d)

CaOH2

29.
What is the best definition for subscript?
 
a)
The big number that tells you the number of molecules.
b)
The atomic number
c)
The little number that tells the number of atoms for each element.
30.
What is the best definition for coefficient?
 
a)
The big number that tells you the number of molecules.
b)
The little number that tells the number of atoms for each element.
c)
The atomic number
31.
What is the best definition for molecule? 
a)
A molecule is formed when two or more atoms join together chemically.
b)
A molecule is made of only one atom. 
32.
What is the best formula for this molecule?
a)
2H2O2
b)
6H2O2
c)
6H12O12
d)
6HO
33.
What is the best statement for the picture. 
a)
The molecule has two carbon atoms and four hydrogen molecules. 
b)
The molecule has two carbon atoms and four hydrogen atoms. 
c)
The molecule has two carbon atoms. 
34.
What is the best formula for these molecules?
a)
H2O
b)
H2O2
c)
3H2O
d)
4H2O
35.
Choose the correct statement.
a)
Atoms are the biggest particle in a element.
b)
Atoms are the smallest particle in a molecule.
c)
Atom is the smallest particle in a element.
d)
Atoms are nice.
36.
Choose the correct statement for this glucose molecule.
a)
Glucose has six carbon molecules, 12 hydrogen molecules, and six oxygen molecules. 
b)
Glucose has six carbon molecules, 12 hydrogen molecules, and six oxygen atoms.
c)
Glucose has six carbon atoms, 12 hydrogen atoms, and six oxygen atoms.
37.
What is the total number of atoms in this molecule?
a)
11
b)
3
c)
8
d)
10
38.
What is the total number of atoms in this molecule?
a)
8
b)
4
c)
2
d)
6
39.

In Ca3(PO4)2 valency of calcium is

a)

2

b)

3

c)

4

d)

1

40.

KCl and MgCl2 are two compounds in which valency of potassium and magnesium are------------

a)

2 and 3 Respectively

b)

1 and 2 respectively

c)

1 and 1 respectively

d)

None of the above

e)

1 and 2 respectively

41.

Formula of Phosphate radical is

a)

PO22-

b)

PO43-

c)

PO32-

d)

PO44-

42.

Potassium chloride

a)

K2Cl2

b)

KCl

c)

KCl2

d)

K2Cl

43.

Write molecular formula for Ammonium sulphate

a)

(NH4)2SO4

b)

NH4SO4

c)

NH4SO

d)

NHSO

44.

Zinc carbonate

a)

ZNCO3

b)

ZnCO

c)

Zn2CO3

d)

ZnCO3

45.

Which type of reaction is:

H2 + O2 → H2O

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

46.

Which type of reaction is:

NaCl + AgNO3 → NaNO3 + AgCl

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

47.

Which type of reaction is:

PbCl2 + AgNO3 → Pb(NO3)2 + AgCl

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

48.

Which type of reaction is:

NH3 + HCl → NH4Cl

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

49.

In an exothermic reaction, energy is __________.

a)

taken in or absorbed

b)

given out or released

50.

Is photosynthesis an exothermic or endothermic reaction?

a)

Endothermic

b)

Exothermic

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