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YEAR 10 QUIZ FIRST ROUND

Total questions: 117

Worksheet time: 2hrs 43mins

Name
Class
Date
1.

Expand and simplify the following quadratic expression...


(x + 3)(x + 2)

a)

x2 + 5x + 6

b)

x2 + 5x + 5

c)

x2 + 6x + 6

d)

x2 + 6x + 5

2.
Find the value of y.
a)
125
b)
135
c)
140
d)
110
3.

What is the size of the relex angle COA?

a)

62o

b)

128o

c)

232o

d)

290o

4.
Are the triangles congruent, if yes, why?
a)
SSS
b)
SAS
c)
ASA
d)

RHS

5.

Solve x2−9x+20=0x^2-9x+20=0  

a)

-2 or 10

b)

-5 or -4

c)

4 or 5

d)

-4 or 5

6.

The diagram shows the sports played by 80 students.

How many students play two sports only?

a)

36

b)

17

c)

14

d)

12

7.
Find the inverse of f(x) = -4x - 12
a)
f-1(x) = 4x - 3
b)

f-1(x) = −x4−3-\frac{x}{4}-3  

c)

f-1(x) = x3+4\frac{x}{3}+4  

d)
f-1(x) = -4x - 3
8.

In the diagram, TP and TQ are tangents to a circle with centre O. Find each value of x

a)

5x

b)

90

c)

15

d)

180

9.

Differentiate y= 5x-4

a)

-5x-5

b)

-20x-4

c)

-25x-5

d)

-20x-5

10.

f(x) = 3x + 10 g(x) = x - 2 Find fg(0)

a)
16
b)
4
c)
-4
d)

-16

11.

Solve for x: log4 X= 3

a)

12

b)

64

c)

81

d)

100

12.

A computer game was sold for $42 at a profit of 20%. How much was the original price of the game?

a)

$60

b)

$49

c)

$42

d)

$35

13.

What are the roots of the quadratic equation shown in the graph?

a)
x= 0 and x= -4
b)
x= 0 and x= 4
c)

-2 and 2

d)

x= -2 and 6

14.

A curve is given by y=3x2+6x+5y=3x^2+6x+5  . Find the coordinates of the turning point.

a)

 (-1, 2)

b)

 (-1, -4)

c)

(-1, 14)

d)

(-1, 8)

15.

DAE is a tangent to a circle.

Write down the size of angle ACB. Giv

a)

61o

b)

29o

c)

63o

d)

27o

16.

The diagram shows a tangent to a circle with centre O. Find x and y

a)

x = 80°

y = 40°

b)

x = 100°

y = 50°

c)

x = 80°

y = 50o

d)

x = 100°

y = 40°

17.

𝑦 is directly proportional to x𝑦\ is\ directly\ proportional\ to\ \sqrt{x}   y=54 when x=36 If:

y=kxy=kx   Find k

a)

6

b)

9

c)

10

d)

324

18.
What is the value of the unknown angle?
a)
90 degrees
b)
140 degrees
c)
120 degrees
d)
130 degrees
19.
Given f(x) = 2x and g(x) = x2+3 , find f(g(x)).
a)
x2+2x+3
b)
4x2+3
c)
2x2+3
d)
2x2+6
20.

Find the value of b.

a)

90o

b)

29o

c)

61o

d)

39o

21.

Which material heats up quickest?

a)

Aluminium

b)

Concrete

c)

Diamond

d)

Glass

e)

Water

22.

Which material heats up quickest?

a)

Aluminium

b)

Concrete

c)

Diamond

d)

Glass

e)

Water

23.

10 kg of aluminium is heated from 120C to 220C. How much energy is needed?

a)

8 970 000 J

b)

897 J

c)

8970 J

d)

89 700 J

e)

897 000J

24.

What is the equation for specific heat capacity?

a)

Q=mcΔTQ=mc\Delta T

b)

Q=mcΔTQ=\frac{mc}{\Delta T}

c)

Q=ΔTmcQ=\frac{\Delta T}{mc}

d)

Q=cΔTmQ=\frac{c\Delta T}{m}

e)

Q=mΔcTQ=m\Delta cT

25.

What are the units for specific heat capacity?

a)

J kg / °C

b)

J / kg / °C

c)

J / °C

d)

J / kg

e)

kg °C / J

26.

What is happening between D and E?

a)

Melting

b)

Boiling

c)

Condensing

d)

Freezing

e)

Sublimation

27.

2 kg of glass is given 84 000 J. What is the change in temperature?

a)

+50°C

b)

-50°C

c)

0°C

d)

+100°C

e)

-100°C

28.

When an electric heater is supplied with an electric power of 2.0 kW to heat 4.0 kg of water for 1 minute, calculate the increase in temperature of the water. Assume that the specific heat capacity of water is 4200 J kg-1 0C-1 and there is no heat loss to the surroundings.

a)

3.050C

b)

7.10C

c)

140C

d)

300C

29.

Given that the specific latent heat of fusion of a sample is 550 kJ kg-1. Which of the following is correct?

a)

The mass of this sample is 1 kg.

b)

The energy needed to increase the temperature of 1 kg of this sample in solid state through 1oC is 550 kJ.

c)

The energy needed to increase the temperature of 1 kg of this sample in liquid state through 1oC is 550 kJ.

d)

The energy needed to change 1 kg of the material from solid state to liquid state is 550 kJ.

30.

Regarding to the fixed points in Celsius scale, which of the following is correct?

a)

The upper fixed point is the freezing point of water and the lower fixed point is the boiling point of water.

b)

The upper fixed point is the boiling point of methane and the lower fixed point is the freezing point of methane.

c)

The upper fixed point is the boiling point of water and the lower fixed point is the freezing point of ice.

d)

The upper fixed point is the melting point of ice and the lower fixed point is the freezing point of ice.

31.

How much energy is required to change 5 kg of ice at 0 °\degree C into water at the same temperature? (latent heat of fusion is 3.36 X 10610^6 J/kg )

a)

16.1 XundefinedJ

b)

16.8 XundefinedJ

c)

15.1 Xundefinedcal

d)

16.8 Xundefinedcal

32.

Because of surface tension, you can put things into a full glass of water and...

a)

the water will immediately spill.

b)

the water won't spill for quite a while.

c)

the water will never spill.

d)

when the water spills, whatever you put in will also spill.

33.
Equilibrium means _________
a)
being at rest
b)
traveling at light speed
c)
balance
d)
pushing or pulling
34.
What is the transfer of heat by movement of liquids or gases?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
35.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
36.

When calculating molar mass for an element, which number do you need to look at on the periodic table?

a)

Atomic number

b)

Atomic Mass

c)

Atomic particles

d)

Avogardo's Number

37.
What is the general formula of the alkynes?
a)
CnH2n+1
b)
CnH2n+2
c)
CnH2n-1
d)
CnH2n-2
38.
What is an ore?
a)
a solid metal
b)
a rock cantaining a metal combined with other elements
c)
an element
d)
an object used to row a boat
39.

Because of surface tension, you can put things into a full glass of water and...

a)

the water will immediately spill.

b)

the water won't spill for quite a while.

c)

the water will never spill.

d)

when the water spills, whatever you put in will also spill.

40.

Surface tension is the property of water in which...

a)

water molecules at the surface tend to stick together.

b)

water spills easily.

c)

water tends to be see-through.

41.

Describe COHESION.

a)

Water molecules attracted to other substances.

b)

Water molecules climbing upwards against the force of gravity.

c)

Water molecules dissolving many substances because of its polarity.

d)

Water molecules attracted to other water molecules.

42.
Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?
a)
adhesion
b)
surface tension
c)
solvent properties
d)
nonpolar
43.

surface tension of water can be reduced by

a)

heating

b)

Adding soap solution

c)

cooling

d)

adding salt

44.
Force of attraction between similar molecules is called 
a)
Cohesive force
b)
Adhesive force
c)
Magnetic force
d)
gravitational force
45.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
46.
tendency of molecules of the same kind to stick to one another
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
47.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
48.
Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?
a)
adhesion
b)
surface tension
c)
solvent properties
d)
nonpolar
49.
Equilibrium means _________
a)
being at rest
b)
traveling at light speed
c)
balance
d)
pushing or pulling
50.
Static Equilibrium means ____
a)
Objects at rest
b)
moving objects
c)
that which is in outer space
d)
electrical balance
51.

Centre of gravity the point in an object where its weight is balanced

a)

True

b)

False

c)

none

52.

Which one describe the point through which the whole weight of the body acts?

a)

Inertial Point

b)

Center of gravity

c)

Centriod

d)

Central point

53.

The point through which the whole weight of the body acts is called

a)

Inertial Point

b)

Center of gravity

c)

Centriod

d)

Central point

54.

Center of gravity of an object depends on it's

a)

weight

b)

mass

c)

density

d)

shape

55.

What is the centre of gravity

a)

The centre of the earth

b)

An imaginary point at which weight is concentrated

c)

Gravity

d)

How objects fall to the ground.

56.

Do all objects have a centre of gravity?

a)

No objects have a centre of gravity

b)

Only some objects have a centre of gravity

c)

Only very heavy objects have a centre of gravity

d)

Yes all objects have a centre of gravity

57.

Where will be the centre of mass of a uniform rod lies ?

a)

At its end

b)

At its middle point

c)

At its centre of its cross sectional area

d)

Depends upon its material

58.

The diagrams show four solid cones. The centre of mass of each cone is marked by a point labelled M.


Which cone is the most stable

a)

A

b)

B

c)

C

d)

D

59.
What is the transfer of heat by movement of liquids or gases?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
60.
What are waves that can transfer heat through the vacuum of empty space?
a)
Electromagnetic waves
b)
Convection
c)
Conduction
d)
Heat
61.
What is a transfer of heat energy by electromagnetic waves?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
62.
What is the transfer of heat by direct contact?
a)
Convection
b)
Electromagnetic waves
c)
Radiation
d)
Conduction
63.
What is the measurement of the average kinetic energy of a substance?
a)
Kinetic energy
b)
Temperature
c)
Thermal energy
d)
Potential energy
64.
What is a substance that does NOT conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
65.
What is a substance that DOES conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
66.
What is the energy of the movement of particles in a substance?
a)
Potential energy
b)
Kinetic energy
c)
Thermal energy
d)
Temperature
67.
Warm air rises and the cool air sinks. This is...
a)
conduction
b)
convection
c)
radiation
68.
Heat transfers from an area of ________temperature to an area of ______ temperature.
a)
high to low
b)
low to high
c)
high to high
69.
Warm water from the ocean moves to the north while cool waters moves to the south. This is an example of.. 
a)
Conduction
b)
Convection
c)
Radiation
70.
If an object has particles that are moving very quickly, the object 's temperature is probably _____.
a)
cold
b)
slow
c)
big
d)
hot
71.
When the temperature of matter decreases the particles ...
a)
speed up and move farther apart
b)
speed up and move closer together
c)
slow down and move farther apart
d)
slow down and move closer together
72.
Phase change from a solid to a liquid...
a)
melting
b)
freezing
c)
evaporation
d)
condensation
73.
Phase change from a liquid to solid?
a)
Melting
b)
Condensation
c)
Evaporation
d)
Freezing
74.
If I am adding thermal energy to a liquid it will turn into _______. 
a)
Solid
b)
Liquid
c)
Gas
d)
Melt
75.
You're holding hands with your best friend.  Your friend's hands are REALLY warm and yours are really cold.  After a few minutes, this has changed.  How might you explain what happened?
a)
The cold energy from your hand transferred to your friend's hand through conduction.
b)
The heat energy from your friend's hand transferred to your hand through conduction. 
c)
The cold energy from your hand transferred to your friend's hand through convection.
d)
The heat energy from your friend's hand transferred to your hand through convection.
76.
On a hot summer day, a student dropped an ice cube onto a park bench. Within minutes, the ice cube melted. Which method of heat transfer best describes the process the student observed?
a)
radiation
b)
melting
c)
conduction
d)
convection
77.

When calculating molar mass for an element, which number do you need to look at on the periodic table?

a)

Atomic number

b)

Atomic Mass

c)

Atomic particles

d)

Avogardo's Number

78.

A mole of any substance is how many particles?

a)

6.02 x 1023

b)

6.02 x 10-23

c)

602 million

d)

602

79.

The calculation of the relationships between different molecules in a reaction is the definition of __________________.

a)

physics

b)

algebra

c)

stoichiometry

d)

language arts

80.

Before you begin any stoichiometry problem, you must always start with this.

a)

A periodic table.

b)

A calculator.

c)

A balanced chemical equation.

d)

All of the above are helpful.

81.

If I have 6.02 x 1023 particles of O2, how many moles do I have?

a)

1

b)

6.02 x 1023

c)

None

d)

16

82.

In the reaction: P4 + 6Cl2 ---> 4PCl3, how many atoms of Chlorine are in the reactant?

a)

1

b)

2

c)

6

d)

12

83.

In the reaction: P4 + 6Cl2 ---> 4PCl3, how many molecules of Phosphorous Chloride are there in the product?

a)

1

b)

2

c)

4

d)

12

84.

If I were to put 6.02 x 1023 particles of H2O on a balance, what would the reading be?

a)

2 g

b)

4 g

c)

18 g

d)

6.02 g

85.

The process of comparing units is called ____________________.

a)

stoichiometry

b)

dimensional analysis

c)

algebra

d)

social studies

86.

The hardest part of chemistry this year was:

a)

States of matter

b)

Labs

c)

Balancing equations

d)

Atomic Theory

e)

Stoichiometry

87.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
88.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
89.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
90.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
91.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
92.

Adding a catalyst ___________ the activation energy.

a)

Raises

b)

Lowers

c)

Doesn't affect

d)

Inreases

93.

The minimum amount of energy needed for colliding particles to react is called

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

94.

Which graph shows the effect of increasing temperature on the rate of reaction of calcium carbonate with dilute hydrochloric acid?

a)
b)
c)
d)
95.
Why does a catalyst increase the rate of reaction?
a)
it produces extra energy for the reactants
b)
it increases the speed of the reactant particles
c)
it increases the frequency of particle collisions
d)
it reduces the activation energy of the reaction 
96.

How could we make this reaction happen more quickly?

a)

Decrease the concentration of the acid

b)

crush the chalk to increase the surface area

c)

Put the test tube in an ice bath

97.

The major theory of reaction rate is called

a)

Collision theory

b)

Crash theory

c)

Newton's laws

d)

Thermodynamics

98.
What makes an effective collision?
a)
When molecules collide.
b)
When molecules collide with the proper orientation.
c)
When molecules collide with proper orientation and enough kinetic energy.
d)
High Temperature.
99.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
100.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
101.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
102.
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.
a)
false
b)
true
103.
Exothermic reactions release heat to the surroundings.
a)
true
b)
false
104.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
105.

What type of reaction is this?

a)

Endothermic

b)

Exothermic

106.

A chemical reaction in which energy is absorbed is ______________.

a)

an endothermic reaction

b)

an exothermic reaction

c)

a single replacement reaction

d)

a double replacement reaction

107.

The following equation shows the reaction between calcium carbonate, CaCO3 and hydrochloric acid, HCl:


CaCO3(aq) + 2HCl(aq) → CaCl2(aq) + CO2 (g)­­ + H2O(l)


Which of the following is the suitable method to determine the rate of reaction?

a)

Change in the temperature of the solution with time

b)

Change in the volume of carbon dioxide gas with time

c)

Change in the mass of water with time

d)

Change in the concentration of hydrochloric acid with time

108.

Which of the following explains the meaning of effective collision?

a)

The collision where its energy is less than the activation energy

b)

The collision that has a low energy

c)

The collision which takes place before a reaction

d)

The collision that causes a reaction

109.

Which of the following is the meaning of activation energy?

a)

The maximum energy that the particles need to produce effective collision

b)

The amount of energy used by the particles during a collision

c)

The minimum amount of energy that particles must have in order to react

d)

The amount of kinetic energy of molecules during a collision

110.

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

a)

larger

b)

smaller

c)

rectangular

d)

spherical

111.

Which unit is correct for the rate of reaction?

a)

g mol-1

b)

g min-1

c)

mol dm-3

d)

kJ mol-1

112.

Which of the following would react fastest in sweet tea?

a)

a sugar cube

b)

a sugar cube cut in half

c)

a sugar cube cut in fourths

d)

a sugar cube crushed into powder

113.

Enzymes in your body act as catalysts. Thus, the role of enzymes is to___________.

a)

inhibit chemical reactions.

b)

increase the rate of chemical reactions.

c)

decrease the rate of chemical reactions.

114.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
115.

Which of the following has the lowest rate of reaction?

a)

Combustion of ethanol

b)

Oxidation of magnesium

c)

Fermentation of glucose

d)

Precipitation of silver chloride

116.

Table 4 shows the total volume of gas evolved at different intervals for the dissociation of hydrogen peroxide.


What is the average rate of reaction in the second minute?

a)

14.0 cm3 min-1

b)

18.0 cm3 min-1

c)

16.0 cm3 min-1

d)

28.0 cm3 min-1

117.

Typically, atoms are more stable when they are

a)

bonded together

b)

apart from each other

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