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WorksheetsYear 10 Chemistry Revision
Total questions: 16
Worksheet time: 11mins
Why are the poles of a power line in our street made of wood?
Wood is a conductor- they stop electrical current from the power lines hitting the ground
So that during thunderstorms in winter, there isn't as much electrical current in the power line
Because electrons can move faster through wood compared to any other material
Wood is an insulator- they stop electrical current from the power lines hitting the ground
What type of reaction is this?
Exothermic
Endothermic
Potential
Kinetic
A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?
It is an exothermic reaction
It is an endothermic reaction
None of the above
All of the above
If they energy required to break the bonds is greater than the energy given out by making new bonds the reaction is
Exothermic
Endothermic
Neutralisation
Displacement
Fossil fuel is an energy providing material that comes from
long-dead remains of living things.
the center of the Earth.
out space.
the atmosphere.
Which is less reactive than sodium but cannot be extracted from its ore using carbon
Magnesium
Potassium
Platinum
Zinc
Which direction do the electrons flow in wire X and which metal is oxidized?
A
B
C
D
What type of decay is shown here
23892U ---> 23490Th + 42He.
Alpha
Gamma
Beta
None of the above
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
Alpha
Gamma
Beta
Fuel cells combine hydrogen and oxygen to produce........
Electricity, power and nitrogen
Electricity, heat and water
heat, power and ammonia
Sulfur dioxide, carbon monoxide and pure water
Increasing the ____ causes the particles (atoms
or molecules) of the reactants to move more quickly so that they collide with each other more frequently and with more
energy.
Catalyst
Temperature
Concentration
Surface area
Pick the TWO (2) options that will INCREASE the rate of a reaction.
Reducing Heat
Adding Catalyst
Adding Heat
Removing Catalyst
When light hits on the film of photography, Some of the silver bromide decomposes to ...... and .....
Ag and Cl
Ag and Br
Fe and Cl
Cu and Br
In the photography, there exists redox reaction on silver and bromide. which statement is true ?
Silver ion gets reduced and bromide ion is oxidized
Bromide ion gets reduced and silver ion is oxidized
Silver gets reduced and bromide is oxidized
None of the above
For the reaction...
N2 (g) + 3 H2(g) ⇌ 2 NH3 (g)
If the pressure in the system is increased, which substance(s) will increase in concentratio
N2
H2
N2 and H2
NH3
2SO2(g)+O2(g)⇌2SO3(g)
Adding SO3(g) will
shift equilibrium right
shift equilibrium left
have no change
