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Science Grade 8
Test Description: Science
Instructions: Answer all questions to get your test result.
1) This formula C6H12O6 is -
A
Carbon, Hydrogen and Oxygen
B
Hydrogen, Oxygen Carbon
C
Oxygen, Carbon and Hydrogen
D
Water, Hydrogen Carbon
2) The random movement of particles of gas and a liquid is known as
A
diffusion
B
kinetic energy
C
brownian motion
D
sublimation
3) The chemical property of matter is
A
the state in which it is found in its natural state
B
the ability to react with oxygen gas
C
the correctness
D
the boiling point
4) Which causes the high density of solids
A
The forces between particles are weak
B
The forces are weak
C
The particles are packed closely together
D
The energy of the particles are very high
5) Mixture
A
none
B
copper and iron ore
C
copper
D
Iron ore only
6) Increases pressure
A
cooling and heating
B
cooling
C
none
D
heating only
7) Compound
A
O2 and KMnO4
B
O2
C
None
D
KMnO4 only
8) Separated by physical means
A
Cooling
B
O2
C
None
D
KMnO4
9) Physical property
A
both
B
Density
C
Boiling point
D
none
10) Product of combustion reaction
A
Carbon monoxide only
B
Iron
C
All
D
Ore
11) Yellow element
A
Carbon
B
Neither
C
Carbon and Sulfur
D
Sulfur only
12) Choose either - Element, Compound, Mixture or Alloy: ring made of 24 carat gold
A
Element
B
Alloy
C
Compound
D
Mixture
13) Choose either - Element, Compound, Mixture or Alloy: Air we breathe
A
Element
B
Mixture
C
compound
D
Alloy
14) Choose either - Element, Compound, Mixture or Alloy: brass paper weight
A
Mixture
B
Element
C
Alloy
D
Compound
15) Choose either - Element, Compound, Mixture or Alloy: the gas produced when a metal reacts with an acid
A
Mixture
B
Alloy
C
Compound
D
Element
16) Choose either - Element, Compound, Mixture or Alloy: The earth's most common solvent
A
Element
B
Alloy
C
Compound
D
Mixture
17) Following elements Ne and B
A
Neon and boron
B
boron
C
Neither
D
Boron
*select an answer for all questions
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