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Pre TOP 3 Quiz

Total questions: 80

Worksheet time: 40mins

Name
Class
Date
1.

An ........ undergoes a physical transformation without a chemical reaction. The substance transforms from one form to another by absorbing heat.

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

2.

The picture is example of...

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

3.

An ....... does not involve any chemical reaction. Here a compound goes from one phase to another by releasing heat.

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

4.

That picture is example of ...

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

5.

Example of a process where no chemical reactions take place is dissolving sodium hydroxide (NaOH), also known as lye and caustic soda, in water (H2O) releases sodium ions (Na+) and hydroxide (OH–) ions along with heat. The compound disassociates in water and releases heat. This is example of...

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

6.

This is ...

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

7.

Look at the table. Which are count as exothermic reactions?

a)

A and C

b)

A and D

c)

B and C

d)

B and D

8.

Why the reaction between magnesium and hydrochloric acid is classified as exothermic?

a)

It involves solid reactant

b)

It releases heat

c)

It take place very quickly

d)

It produces a gas

9.

Which one is not endothermic process?

a)

b)

c)

d)

10.

When you added the baking soda to the vinegar you will find that the temperature decreased. Why tis reaction classified as endothermic reaction?

a)

Absorbs energy, causing an increase in temperature of surrounding

b)

Absorbs energy, causing a decrease in temperature of surrounding

c)

Releases energy, causing an increase in temperature of surrounding

d)

Releases energy, causing a decrease in temperature of surrounding

11.

The shown picture can classified as..

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

12.

An ..... causes the surroundings to cool down. That explains why we feel cold when inside a canopy of trees.

a)

Endothermic process

b)

Endothermic reaction

c)

Exothermic process

d)

Exothermic reaction

13.

An endothermic process does not involve a ....

a)

Physical transformation

b)

Temperature change

c)

Heat transfer

d)

Chemical reaction

14.

In an endothermic reaction, the reaction takes place within a system. The system takes heat from the surroundings, making the surroundings ..... and the system .....

a)

Colder, colder

b)

Colder, hotter

c)

Hotter, hotter

d)

Hotter, colder

15.

A chemical reaction occurs when you place sherbet on your tongue. Recall which of the following is a sign that the reaction is endothermic.

a)

The sweet taste

b)

The sensation of coolness

c)

The fizzing sensation as bubbles of gas are produced

d)

The sharp, tangy flavour

16.

The basic units of matter is the definition of..

a)

Mass

b)

Solid

c)

Atom

d)

Motion

17.

Nucleus consist of...

a)

Proton and neutron

b)

Proton and electron

c)

Neutron and electron

d)

Neutron

18.

The mass of proton ..... the mass of electron

a)

Equal

b)

More than

c)

Less than

d)

Can't determined

19.

The mass of proton ..... the mass of neutron

a)

Equal

b)

More than

c)

Less than

d)

Can't be determined

20.

Proton has .... electrical charge

a)

Positive

b)

Negative

c)

No

d)

Sometimes positive, sometimes negative

21.

Neutron has .... electrical charge

a)

Positive

b)

Negative

c)

No

d)

Sometimes positive, sometimes negatives

22.

Electron has .... electrical charge

a)

Positive

b)

Negative

c)

No

d)

Sometimes positive, sometimes negative

23.

Which statement is true?

a)

The mass of electron = the mass of neutron

b)

The mass of electron > the mass of proton

c)

The mass of proton < the mass of neutron

d)

Electron have almost no mass

24.

Which sub – atomic particle has the smallest mass ?

a)

Proton

b)

Electron

c)

Neutron

d)

All have same mass

25.

The total number of proton is...

a)

0

b)

1

c)

2

d)

3

26.

The total number of neutron is..

a)

0

b)

1

c)

2

d)

3

27.

The total number of electron is....

a)

0

b)

1

c)

2

d)

3

28.

The total number of electron is...

a)

37

b)

49

c)

86

d)

123

29.

The total number of neutron is...

a)

37

b)

49

c)

86

d)

123

30.

The total number of proton is...

a)

37

b)

49

c)

86

d)

123

31.

The total number of neutron is...

a)

54

b)

77

c)

131

d)

185

32.

The total number of electron is.....

a)

54

b)

77

c)

131

d)

185

33.

The total number of proton is...

a)

54

b)

77

c)

131

d)

185

34.

THe total number of proton is..

a)

82

b)

125

c)

207

d)

289

35.

The total number of neutron is..

a)

82

b)

125

c)

207

d)

289

36.

The total number of electron is...

a)

82

b)

125

c)

207

d)

289

37.

Which one have the most number of proton?

a)

b)

c)

d)

38.

Which one have the smallest number of neutron?

a)

b)

c)

d)

39.

Which one have the most number of electron?

a)

b)

c)

d)

40.

Which one have the number of neutron is 30?

a)

b)

c)

d)

41.

Which one have number of neutron 20?

a)

b)

c)

d)

42.

What is the name of John Dalton's theory?

a)

Chacha atomic theory

b)

Theory of atom

c)

Daltons's atomic theory

d)

Small ball theory

43.

What are elements made of?

a)

Solid

b)

Matter

c)

Motion

d)

Atoms

44.

An atom of hydrogen and an atom of carbon are...

a)

Same

b)

Different

c)

Sometimes same, sometimes different

d)

Can't determined

45.

What are compound made of?

a)

Single atom

b)

Atoms of different elements

c)

Atoms of same elements

d)

Can't determined

46.

The ratio of atom HCl is..

a)

1:3

b)

2:1

c)

1:1

d)

2:3

47.

Scientist proposed that atoms consist of small, negative electrons embedded in a massive , positive sphere is..

a)

John Dalton

b)

JJ Thompson

c)

Ernest Rutherford

d)

Niels Bohr

48.

The plum pudding model (or chocolate chip cookie model) refers to ... theory of atom.

a)

John Dalton

b)

JJ Thompson

c)

Ernest Rutherford

d)

Niels Bohr

49.

..... most famous experiment was the gold foil experiment

a)

John Dalton

b)

JJ Thompson

c)

Ernest Rutherford

d)

Niels Bohr

50.

..... atomic model became known as the nuclear model.

a)

John Dalton

b)

JJ Thompson

c)

Ernest Rutherford

d)

Niels Bohr

51.

The atomic theory of...

a)

John Dalton

b)

JJ Thompson

c)

Ernest Rutherford

d)

Niels Bohr

52.

Theory atom of..

a)

John Dalton

b)

JJ Thompson

c)

Ernest Rutherford

d)

Niels Bohr

53.

Which one is teory atom of JJ Thompson?

a)

b)

c)

d)

54.

Which kind of food can represent Rutherford atomic model?

a)

b)

c)

d)

55.

Theory atom of Niels Bohr is..

a)

Solid Sphere

b)

Nuclear Model

c)

Plum pudding model

d)

Planetary model

56.

In the Bohr's theory ... orbited the nucleus in different energy levels or at specific distances from the nucleus.

a)

Protons

b)

Electrons

c)

Neutrons

d)

No one orbited nucleus

57.

What did JJ Thompson discover?

a)

Proton

b)

Electron

c)

Neutron

d)

Choco chip cookies

58.

What is a charge of neutron?

a)

Positive

b)

Negative

c)

Neutral

d)

Sometimes positive, sometimes negative

59.

In gold foil experiment, what is the charge of an alpha particle?

a)

Positive

b)

Negative

c)

Neutral

d)

Sometimes positive, sometimes negative

60.

Why is Rutherford's experiment called the gold foil experiment?

a)

He used thin sheet of silver foil

b)

He used thin sheet of bronze foil

c)

He used thin sheet of chromium foil

d)

He used thin sheet of gold foil

61.

Which of these item is NOT pure subtances?

a)

Oxygen

b)

Gold

c)

Soil

d)

Potassium

62.

Which of these items is NOT a mixture?

a)

Orange juice

b)

Soil

c)

Sodium Chloride

d)

Black ink

63.

Pure substances are substances that are made up of ... kind of particle.

a)

One

b)

Two

c)

Four

d)

More than five

64.

Pure substances are substaces that have a ... structure

a)

Unstable

b)

Moving

c)

Not constant

d)

Fixed

65.

Pure substances are further classified as ...

a)

Elements and mixtures

b)

Elements and compounds

c)

Mixtures and compounds

d)

Mixtures

66.

If an element is pure, it means that every one ot its atoms is exactly the ... and made of just .... type of atom.

a)

Different, one

b)

Different, more than one

c)

Same, one

d)

Same, more than one

67.

Pure diamonds are ... and translucent.

a)

Colourless

b)

Green

c)

Yellow

d)

Pink

68.

Which element mixed with carbon in diamonds makes them blue?

a)

Nitrogen

b)

Nickel

c)

Hydrogen

d)

Boron

69.

If a few carbon atoms per million are replaced with nitrogen, the diamond will be...

a)

Colourless

b)

Pink

c)

Blue

d)

Yellow

70.

Element may cause a diamond to be green, except...

a)

Boron

b)

Nitrogen

c)

Nickel

d)

Hydrogen

71.

What percentage of 16 carat gold is gold?

a)

50%

b)

67%

c)

72%

d)

78%

72.

Number of carat of gold that has percentage of purity by 50% is..

a)

10 carat

b)

12 carat

c)

15 carat

d)

18 carat

73.

What percentage of 6 carat gold is gold?

a)

20%

b)

25%

c)

30%

d)

35%

74.

The combination between sulphur and iron

become iron sulfide is example of...

a)

Neutralization

b)

Combustion

c)

Displacement

d)

Synthesis

75.

Burning of wood, combustion of gasoline in a car engine,

and burning of candles is example of...

a)

Neutralization

b)

Combustion

c)

Decomposision

d)

Combination

76.

Example of decomposision is..

a)

AgNO3 + NaCl → AgCl + NANO3

b)

(H2O) → 2H2 + O2

c)

Zn + CuSO4 → ZnSO4 + Cu

d)

HCl + NaOH → NaCl + H2O

77.

Which one is NOT example of displacement?

a)

AgNO3 + NaCl → AgCl + NANO3

b)

Zn + CuSO4 → ZnSO4 + Cu

c)

HCl + NaOH → NaCl + H2O

d)

Zinc + Copper Sulphate → Zinc Sulphate + Copper

78.

In combustion there are the rapid combination of a substance with oxygen,

releasing heat and light.

a)

Sound and light

b)

Light and heat

c)

Heat and sound

d)

Light

79.

The reaction of an acid and a base, which forms water and

a salt is..

a)

Combustion

b)

Synthesis

c)

Displacement

d)

Neutralization

80.

General form of decomposision is..

a)

A + B → AB

b)

AB → A + B

c)

A + BC → AC + B

d)

AB + CD -> AD + CB

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