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Worksheets9 Chem Revision
Total questions: 20
Worksheet time: 17mins
Name
Class
Date
1.
The atomic number of an element tells you
a)
how many protons and neutrons it has
b)
how many protons and electrons it has
c)
its place on the periodic table
d)
the mass of the nucleus
2.
Which of the following is not an example of a chemical reaction
a)
burning of wood
b)
freezing of water
c)
rotting of fruit
d)
explosion of dynamite
3.
An atom is made up
a)
little particles
b)
protons, neutrons and electrons
c)
protons, nucleus and electrodes
d)
positive, neutral and negative
4.
pH stands for
a)
power of hydrogen
b)
percent of hydrogen
c)
possible hydrogen
d)
precipitation of hydrogen
5.
The amount of reactants should equal the amount of products. This is the rule for
a)
chemical reactions
b)
acid base reactions
c)
conservation of mass
d)
neutralisation reactions
6.
When you vomit it tastes sour because
a)
your stomach contains an acid
b)
your stomach contains an alkali
7.
Exothermic reactions
a)
happen on the outside
b)
take in heat
c)
give off heat
d)
happen on the inside
8.
Dilute acids and bases have
a)
lots of water mixed with them
b)
not very much water mixed with them
c)
lots of bubbles when metals are added
d)
strong acid
9.
An alkali is
a)
An acid dissolve in water
b)
A base dissolved in water
c)
An example of stomach acid
d)
An example of cleaning products
10.
How can the gas hydrogen be tested for?
a)
Relights a splint
b)
Limewater goes cloudy
c)
Squeaky pop test
d)
Puts out a lit flame
11.
What is the general word equation for a metal and acid reaction?
a)
metal + acid --> salt
b)
metal + acid --> salt + hydrogen
c)
metal + acid --> oxygen + hydrogen
d)
metal + acid --> oxygen + water
12.
Metal and water word equation...
a)
metal + water --> metal oxide + oxygen
b)
metal + water --> metal hydroxide + hydrogen
c)
metal + water --> metal hydride + hydroge
d)
metal + water --> carbon dioxide + water
13.
Souring milk is an example of a
a)
Physical property
b)
Physical change
c)
Chemical property
d)
Chemical change
14.
Which of the following is a compound?
a)
sodium
b)
sea water
c)
carbon dioxide
d)
brass
15.
The name of the chemical symbol Ar is ...
a)
Argon
b)
Argean
c)
Agreon
d)
Armanon
16.
Postive ions are called
a)
anions
b)
positrons
c)
alpha
d)
cations
17.
A negative ion is called
a)
cation
b)
anion
c)
cathode
d)
electro
18.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
19.
Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
20.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
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