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Worksheetschemistry physics
Total questions: 21
Worksheet time: 11mins
which one of the following is not a laboratory safety rule?
wear safety clothing
do not eat in the lab
do not inform your teacher of an accident
do not run in the lab
what should one do when in contact of sodium hydroxide in the lab?
add an acid
add more sodium hydroxide
run out of the lab
wash with running water
what should be done when suffocated by fumes in the lab?
drink a lot of water
close your mouth
move out of the lab to a better ventilated area
close all the windows
which one of the following is not a state of matter?
solid
oxygen
liquid
gas
the picture shows arrangement of particles in what state of matter?
gas
liquid
solid
plasma
the figure shows arrangement of particles in what state of matter?
solid
gas
liquid
plasma
the figure shows arrangement of particles in what state of matter?
plasma
solid
liquid
gas
exothermic reactions results in?
heat absorption
heat release
formation of products
breakdown of reactants
endothermic reaction results in ?
heat release
heat absorption
breakdown of reactants
formation of products
the figure shows different changes of state of matter. which change of state is exothermic?
melting
boing
sublimation
freezing
the figure shows different changes of state of matter. which change of state is endothermic?
condensation
freezing
desposition
melting
the figure shows a cooling curve of a gas. what shows that this a pure substance?
it exist as a solid
it exist as a liquid
sharp/fixed freezing point
it exist as a gas
the figure shows magnetic field lines of a bar magnet. which of the following is true?
x is the south pole
v is the north pole
x is the north pole
both x and v are north poles
what would happen if two magnets are brought closer as shown?
nothing
they attract
they repel
they form a magnet field
what would happen if two magnets are brought closer as shown?
nothing
they attract
they repel
they demagnetize
the magnetic field lines shows that the poles being brought closer are?
south pole and south pole
south pole and north pole
north pole and south pole
north pole and north pole
a magnetic material can be magnetized by sliding a permanent magnet using the north pole following the same direction several times. this time of magnetization is called?
hammering
electrical
stroking
inducing
a magnetic material can be magnetized by placing it in a magnetic field of two magnets and gently tapping with a hammer. this time of magnetization is called?
induction
stroking
hammering
electrical
steel is
easy to magnetize
easy to demagnetize
harder to magnetize
used in electromagnets
a magnet can be demagnetized by?
north pole points north pole
south pole points south pole
being exposed to very high temperature
when in attracts non magnetic material
the figure shows the deflection of a compass needle when placed in a magnetic field. which deflection is wrong?
A
B
C
D
