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chemistry

Total questions: 130

Worksheet time: 1hrs 23mins

Name
Class
Date
1.

Which subatomic part of an atom gives it a positive charge?

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleus

2.

What is the smallest 'building block' of the elements that make up the universe?

a)

An atom

b)

An electron

c)

A proton

d)

A cell

3.

An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

a)

0

b)

7

c)

6

d)

13

4.

A certain atom of oxygen contains 8 protons, 8 neutrons, & 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom?

a)

It has 9 neutrons in its nucleus.

b)

It is an isotope of oxygen.

c)

Its atomic mass is a decimal number.

d)

It cannot be an atom of oxygen.

5.

An atom of neon has 8 valence electrons. What will an atom of neon MOST likely do to be stable?

a)

Gain 1 electron

b)

Lose 2 electrons

c)

Lose 8 electrons

d)

Neither gain nor lose any valence electrons

6.

What type of bond is formed when atoms share electrons?

a)

Covalent

b)

Ionic

c)

Hydrogen

d)

Polyatomic

7.

How are ionic and covalent bonds alike?

a)

They both form organic molecules.

b)

They both fill outer electron shells.

c)

They both transfer electrons from one atom to another.

d)

They both transfer protons from one atom to another.

8.

A substance with a pH of 8 is a

a)

acid

b)

base

c)

neutral

9.

Carbon has 4 valence electrons which means

a)

it can only form bonds with carbon

b)

it is stable

c)

it can make ionic bonds

d)

it wants to make 4 covalent bonds

10.

The electrons in the outermost energy level are called

a)

valence

b)

ions

c)

covalent

d)

farthest out

11.

This reaction is showing energy being _____________

a)

Absorbed

b)

Released

c)

There is no change in energy shown

12.

Activation energy is

a)

The energy to start a car

b)

The energy needed to break down CO2

c)

The energy needed to start a reaction

d)

The energy used to digest food

13.

Acids have more ______ ions than bases

a)

OH-

b)

H-

c)

OH+

d)

H+

14.

If salt is dissolved in water, water is the ____________

a)

Solution

b)

Solute

c)

Solvent

d)

Suspension

15.

An example of a carbohydrate would be

a)

meat

b)

milk

c)

eggs

d)

bread

16.

Which of the following would be considered most acidic?

a)

1

b)

3

c)

7

d)

13

17.

The image shows the periodic grid for SODIUM. What is Sodium's atomic mass?

a)

11

b)

12

c)

23

d)

Impossible to tell

18.

What element will have the most similar physical and chemical properties to the element Sulfur (S)?

(click on the periodic table to expand it!)

a)

Carbon (C)

b)

Phosphorous (P)

c)

Oxygen (O)

d)

Neon (Ne

19.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
20.

A substance that changes the rate of a chemical reaction without being used up in the reaction is called a ________________.

a)

bond

b)

catalyst

c)

acid

d)

ion

21.

Short hand representation for the atom of a specific element

a)

element

b)

atom

c)

symbol

22.

Symbol of copper is

a)

Co

b)

Cu

c)

Ca

23.

The valency of Chlorine in AlCl3 is

a)

1

b)

3

c)

2

24.

Sulphur shows valencies

a)

2

b)

4

c)

both

25.

The molecular formula for Ammonium carbonate is

a)

(NH4 )2CO3

b)

(NH4 )CO3

c)

(NH4 )2CO

26.

Name the elements present in Ammonia

a)

nitrogen

b)

hydrogen

c)

both nitrogen and hydrogen

27.

Most suitable element and most widely accepted standard unit for the measurement of atomic mass

a)

Oxygen

b)

Carbon

c)

Nitrogen

28.

The molecular formula for Nitric acid

a)

HNO3

b)

HNO2

c)

HNO

29.

Molecular formula for the oxide of calcium is

a)

CaO

b)

Ca2O

c)

none

30.

The symbol and valency of ammonium is

a)

NH4 , valency is 1

b)

NH3, valency is 1

c)

NH3 , valency is 2

31.

The symbol of tungsten is :

a)

Te

b)

Ta

c)

Ti

d)

W

32.

Which of the following is not a symbol of any element?

a)

S

b)

T

c)

U

d)

V

33.

The Latin name of Silver is :

a)

Argantum

b)

Argentam

c)

Argentum

d)

Argentom

34.

Co represents :

a)

Carbon monoxide

b)

Carbon dioxide

c)

Cobalt

d)

Calcium

35.

Atomic mass of Copper is :

a)

65.3 u

b)

64.5 u

c)

63.3 u

d)

63.5 u

36.

The atomicity of sulphur in solid sulphur is :

a)

4

b)

6

c)

7

d)

8

37.

Molecular mass of water is :

a)

16 u

b)

18 u

c)

20 u

d)

22 u

38.

The valency of Ar is :

a)

0

b)

1

c)

2

d)

3

39.

Ammonia is a compound of:

a)

Carbon

b)

Aluminium

c)

Iron

d)

Nitrogen

40.

Which among the following has the highest atomic mass?

a)

S

b)

Cl

c)

Ar

d)

K

41.
Which of the following elements has the smallest radius?
a)
Mg
b)
Al
c)
Si
d)
K
42.

Which element in Period 2 has the greatest atomic radius?

a)

Be

b)

C

c)

Na

d)

Li

43.

Of the halogens (group 7A), which has the smallest radius?

a)

F

b)

Br

c)

He

d)

At

44.
As you move across the periodic table from left to right, the atomic radius decreases.  This is because - 
a)
the number of protons increases, so attraction to electrons increases
b)
the number of energy levels increases
c)
the number of electrons increases
d)
the atomic mass increases
45.
Ionization energy is...
a)
the energy required to add an electron to a specific atom
b)
how much energy it takes to remove an electron from an atom
c)
the energy required to shield the outer electrons from the nucleus
d)
a measure of the ability of an atom to attract electrons
46.

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

a)

decreases, increases

b)

increases, increases

c)

increases, decreases

d)

stays the same, increases

47.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

48.

The atom with the largest atomic radius in Group 8A is -

a)

Ar

b)

He

c)

Kr

d)

Rn

49.
Francium (Fr) has the lowest ionization energy in Group 1 because - 
a)
it has the smallest number of valence electrons
b)
it has the greatest atomic mass
c)
it has the greatest number of protons, so it attracts its electrons the strongest
d)
its 1 valence electron is very far from the nucleus, so little energy is needed to remove it
50.
Which has the greater EN: 
H or F?
a)
H
b)
F
51.
Which has the greater EN: 
N or C?
a)
C
b)
N
52.

How many valence electrons does Carbon have?

a)

4

b)

5

c)

6

d)

8

53.
Atoms that have a high electronegativity, _______________.
a)
give up their electrons more easily.
b)
hold on to their electrons more tightly.
c)
have more electron shells.
54.
Which of the following sequences corresponds to a correct trend in ionization energy?
a)
Cl > S > P > Al
b)
Sr > Ca > Mg > Be
c)
Rb > K > Na > Li
d)
Rb > Sr > I > Xe
55.

The ability of an atom to attract electrons in a bond is called

a)

Ionization energy

b)

electronegativity

c)

atomic radius

d)

proton affinity

56.
As you move down a group, atomic radius increases because - 
a)
you add more and more neutrons
b)
you add more and more protons
c)
you add more and more shells (energy levels)
d)
you add more atomic mass
57.
The element with the smallest ionization energy in Period 6 is - 
a)
Rn
b)
Cs
c)
Os
d)
Tm
58.

Which of the following will have a lower ionization energy than Scandium (Sc)?

a)

Helium (He)

b)

Titanium (Ti)

c)

Calcium (Ca)

d)

Magnesium (Mg)

59.

Which of the following will have a higher electronegativity than arsenic (As)?

a)

Carbon (C)

b)

Neon (Ne)

c)

Antimony (Sb)

d)

Germanium (Ge)

60.

As you move left to right across a period, ionization energy

a)

increases

b)

decreases

c)

says the same

61.

What group is highlighted here on the periodic table (Group 1A)?

a)

Noble Gases

b)

Halogens

c)

Alkali Metals

d)

Alkaline Earth Metals

62.

What group is highlighted here on the periodic table (Group 8A)?

a)

Noble Gases

b)

Halogens

c)

Alkali Metals

d)

Alkaline Earth Metals

63.

What group is highlighted here on the periodic table (Group 2A)?

a)

Noble Gases

b)

Halogens

c)

Alkali Metals

d)

Alkaline Earth Metals

64.

What group is highlighted here on the periodic table (Group 7A)?

a)

Noble Gases

b)

Halogens

c)

Alkali Metals

d)

Alkaline Earth Metals

65.

What group is highlighted here on the periodic table (D-block elements)?

a)

Non-metals

b)

Metalloids

c)

Rare Earth Metals

d)

Transition Metals

66.

1. In which of the following conditions, the distance between the molecules of hydrogen gas would increase?

(i) Increasing pressure on hydrogen contained in a closed container

(ii) Some hydrogen gas leaking out of the container

iii) Increasing the volume of the container of hydrogen gas

iv) Adding more hydrogen gas to the container without increasing the volume of the container

a)

(a) (i) and (iii)

b)

(b) (i) and (iv)

c)

(c) (ii) and (iii)

d)

(d) (ii) and (iv)

67.

2. When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment:

a)

(a) Air is heavier than bromine

b)

b) Both air and bromine have the same density

c)

(c) Bromine is heavier than air

d)

d) Bromine cannot be heavier than air because it is going upwards against gravity

68.

Which one of the following statements is not true?

a)

a) The molecules in a solid vibrate about a fixed position

b)

b) The molecules in a liquid are arranged in a regular pattern

c)

c) The molecules in a gas exert negligibly small forces on each other, except during collisions

d)

d) The molecules of a gas occupy all the space available

69.

When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

a)

a) Absorbs some heat

b)

b) Releases some heat

c)

c) Neither absorbs nor releases heat

d)

d) Absorbs exactly 3.34 x 105J/kg of heat

70.

When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :

a)

(a) Rises very slowly

b)

b) Rises rapidly until steam is produced

c)

(c) First rises and then becomes constant

d)

d) Does not rise at all

71.

Which of the following has heighest kinetic energy?

a)

Particles of ice at 0 °C

b)

Particles of water at 0 °C

c)

Particles of water at 100 °C

d)

Particles of steam at 100 °C

72.

CO2 can be easily liquefied and even solidified because

a)

It has weak forces of attraction

b)

It has comparatively more force of attraction than other gases

c)

It has more intermolecular space

d)

It is present in atmosphere.

73.

Which of the following does not affect rate of evaporation?

a)

Wind speed

b)

Surface area

c)

Temperature

d)

Insoluble heavy impurities

74.

A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?

a)

Water, air, wind

b)

Air, sugar, oil

c)

Oxygen, water, sugar

d)

Salt, juice, air

75.

Gunja Is Completed Her Science Chapter Where She Wrote Some Statements. She Wants To Know Whether The Statements Are Correct Or Not? Gunja Wants To Take Help From You:

a)

There are some forces of attraction between the particles of matter which bind them together.

b)

The force of attraction is maximum in the particles of solid matter and minimum in the particles of gases matter.

c)

A material which can flow easily and requires a vessel to keep it called fluid.

d)

All the above

76.
Which is NOT a form of matter??
a)
atom
b)
element
c)
energy
d)
compound
77.
What particles make up atoms??
a)
Protons
b)
Neutrons
c)
Electrons
d)
All of the above
78.
What is the electrical charge of a proton?
a)
Positive
b)
Negative
c)
Neutral
79.

Which of the following is NOT true about the periodic table?

a)

Atomic mass is equal to the number of neutrons.

b)

Elements listed by their (increasing) atomic mass.

c)

Groups are the elements listed in columns.

d)

Periods are the elements listed in rows of 8 (for most rows).

80.
If a Carbon atom has 6 protons, how many electrons will it have?
a)
2
b)
4
c)
6
d)
8
81.
_______ and _______ are located inside of the nucleus.
a)
Electrons and Protons
b)
Protons and Neutrons
c)
Neutrons and Electrons
82.
What charge does a neutron have?
a)
+1
b)
-1
c)
No charge
83.
Is Potassuim (K) a metal, non-metal, or a metalloid?
a)
Metal
b)
Non-Metal
c)
Metalloid
d)
Other
84.

How are elements organized in the periodic table ?

a)

Alphabetically

b)

Based on physical and chemical properties

c)

Increasing number of electrons

d)

Most reactive to least reactive

85.

Which accurately describes nonmetals?

a)

Poor conductors of electricity

b)

Often used in computer parts

c)

Both malleable and ductile

d)

Both dull and brittle

86.

Which group on the periodic table is the most reactive?

a)

Group 1

b)

Group 2

c)

Group 13

d)

Group 18

87.

The atomic mass of nitrogen is

a)

7

b)

14.007

c)

21.007

d)

Cannot be known from the given

88.

The number of protons in a sulfur atom is

a)

0

b)

16

c)

32

d)

None of the above answers

89.
How many protons does chlorine have?
a)
35
b)
17
c)
18
d)
4
90.
Which group of elements have both metal and non-metal characteristics?
a)
lanthanides
b)
metalloids
c)
actinides
d)
noble gases
91.

The smallest particle into which an element can be divided and still be the same substance is called _____.

a)

Molecule

b)

Atom

c)

Electron

d)

Neutron

92.

Which of the following are chemical changes?

(i) Decaying of wood

(ii) Burning of wood

(iii) Sawing of wood

(iv) Hammering of a nail into a piece of wood

a)

(i) and (ii)

b)

(ii) and (iii)

c)

(iii) and (iv)

d)

(i) and (iv)

93.

Match the following:

a)

i)-A, ii)-B, iii)-D, iv)-C

b)

i)-B, ii)-A, iii)-C, iv)-D

c)

i)-B, ii)-D, iii)-A, iv)-C

d)

i)-A, ii)-D, iii)-C, iv)-B

94.

An element has mass number 39 and atomic number 19. What are the number of protons present in the element?

a)

39

b)

19

c)

20

d)

None of the above

95.

Inert gases have their valency=0.

a)

True

b)

False

96.

In the equation:

3Fe + XH2O ↔ Y + 4H2

The values of X and Y are:

a)

3 and Fe2O3

b)

3 and Fe3O4

c)

4 and Fe2O3

d)

4 and Fe3O4

97.

An atom of an element has two shells and both are completely filled, what would be the atomic number of that element?

a)

10

b)

14

c)

20

d)

16

98.

The pH of a few common substances were measured and noted as above.

Which option lists the substances from least to most acidic?

a)

Battery acid, Soft drinks, Human saliva, Lime water

b)

Soft drinks, Human saliva, Battery acid, Lime water

c)

Lime water, Battery acid, Human saliva, Soft drinks

d)

Lime water, Human saliva, Soft drinks, Battery acid

99.

When a piece of magnesium metal is added to dilute hydrochloric acid in a test tube, fizzing occurs and hydrogen gas is released from the mixture. What would happen to the burning splinter brought near the mouth of the test tube?

a)

Will get extinguished

b)

Will rekindle

c)

Will go off with a pop sound

d)

None of the above

100.

Which of the following statements is true about A and B?

a)

A and B are isotopes

b)

A and B are isobars

c)

Both isotopes and isobars

d)

None of the above

101.

CO2 can be easily liquified and even solidified because

a)

It has weak forces of attraction

b)

It has comparatively more force of attraction than other gases

c)

It has more intermolecular space

d)

It is present in atmosphere

102.

Which of the following has highest kinetic energy?

a)

Particles of ice at 0°C

b)

Particles of water at 0°C

c)

Particles of water at 100°C

d)

Particles of steam at 100°C

103.

Bose-Einstein Condensate have

a)

Very low kinetic energy

b)

Low kinetic energy

c)

High kinetic energy

d)

Highest kinetic energy

104.

Which of the following is most suitable for summer?

a)

Cotton

b)

Nylon

c)

Polyester

d)

Silk

105.

Which of the following is incorrect about plasma?

a)

Fluorescent tube and neon sign bulbs consist of plasma

b)

The gas gets ionized when electrical energy flows through it

c)

It consists of super-energetic and super-excited particles

d)

The plasma glows with colour which does not depend upon nature of gas

106.

Acid Rain is caused by

a)

CO2 and CO

b)

SO2 and O2

c)

SO2 and NO2

d)

NO2 and O2

107.

Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain:

a)

Carbon only

b)

Carbon and nitrogen

c)

Carbon, hydrogen, and oxygen

d)

Carbon and hydrogen

108.

In a solution of saltwater (a saline solution), salt is the:

a)

Solute

b)

Solvent

c)

Colloid

d)

Sol

109.

Second hardest material in the world

a)

Graphite

b)

Boron Nitride

c)

Carbide

d)

Iron

110.

Which are the ions responsible for transfer of information in neurons

a)

Ca and Mg

b)

Cl and Br

c)

Fe and Cr

d)

Na and K

111.
a solute whose water solution conducts electricity is called a(n)
a)
nonconductor
b)
electrolyte
c)
nonelectrolyte
d)
aqueous solution
112.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
113.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
114.
The thing that does the dissolving
a)
Solute
b)
Solvent
c)
Colloid
d)
Solution
115.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspension
c)
Colloid
116.
Water is a universal solvent
a)
true
b)
false
117.
If an electrical current can run through a solution, it is said to contain
a)
magic
b)
nonelectrolytes
c)
electricity
d)
electrolytes
118.
Which of the following is an electrolyte?
a)
sodium chloride
b)
sugar
c)
water
119.
Solutions in which electric currents cannot run through are said to be
a)
noncolloidal
b)
electrolytes
c)
nonelectrolytes
d)
conductors
120.
An example of a nonelectrolyte is
a)
sugar water
b)
salt water
c)
sodium chloride
d)
hydrogen chloride
121.

Negatively charged particles found outside of the nucleus of an atom are called ______.

a)

protons

b)

neutrons

c)

electrons

122.

Positively charged particles found in the nucleus of an atom

a)

Neutron

b)

Proton

c)

Electron

123.

A neutral particle found in the nucleus of an atom

a)

neutron

b)

proton

c)

electron

124.

How many protons are in carbon?

a)

12

b)

6

c)

0

d)

7

125.

Identify the equation to calculate the number of neutrons for Nitrogen.

a)

7-7=0

b)

14.0067-7=7.0067

c)

14+7=21

d)

14-7=7

126.

Calculate the number of neutrons for potassium.

a)

20

b)

19

c)

39

d)

58

127.

Elements are chemically combined substances that can be broken down into simpler substances.

a)

True

b)

False

128.

The atomic number of an element is equal to the number of

a)

protons and electrons

b)

protons

c)

electrons

d)

electrons and neutrons

129.

The number of protons is equal to the number of electrons.

a)

True

b)

False

130.

Protons + __________ = atomic mass

a)

electrons

b)

neutrons

c)

neither

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