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