WorksheetsYr9 Chemistry
Total questions: 24
Worksheet time: 8mins
Name
Class
Date
1.
An electron is
a)
positively charged
b)
neutral
c)
negatively charged
d)
cannot be determined
2.
Conservation of mass means
a)
all the atoms present before a chemical reaction are not present after
b)
atoms present before chemical reactions are present after
c)
new substances and new elements are formed in a chemical reaction
d)
students should not add anything to the test tube during the experiment
3.
A molecule is
a)
a singular particle of a particular element
b)
another name for an element
c)
2 or more atoms that are combined
d)
a small piece of DNA
4.
The type of reaction that releases energy as heat is called
a)
endothermic
b)
exothermic
c)
respiration
d)
photosynthesis
5.
What is a charged atom known as?
a)
an ion
b)
an isotope
c)
an electron cloud
d)
a quark
6.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
7.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
8.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
9.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
10.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
11.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
12.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
13.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
14.
Which is most acidic?
a)
Baking Soda
b)
Lemon Juice
c)
Black Coffee
d)
Milk
15.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
16.
An acid reacts with metal to produce
a)
Carbon dioxide
b)
Hydrogen gas
c)
Hydrogen gas and water
d)
Salt and hydrogen gas
17.
A neutralisation reaction is a reaction between
a)
Acid and a Base
b)
Acid and water
c)
Base and water
d)
None of the above
18.
An acid reacts with a metal carbonate to produce
a)
Salt, water and hydrogen gas
b)
Salt, water and carbon dioxide
c)
Limewater
d)
Salt and water
19.
What type of reaction is the following:
HCl + Zn --> ZnCl2 + H2
HCl + Zn --> ZnCl2 + H2
a)
Neutralisation
b)
Acid and a metal
c)
Acid and a carbonate
d)
Ionic
20.
Complete the following reaction:
Sulphuric acid + sodium carbonate
-->
Sulphuric acid + sodium carbonate
-->
a)
Carbon dioxide + water
b)
calcium carbonate + water + carbon dioxide
c)
Sodium sulphate + water + carbon dioxide
d)
Sodium chloride + water + carbon dioxide
21.
Complete the following reaction:
Hydrochloric acid + magnesium hydroxide -->
Hydrochloric acid + magnesium hydroxide -->
a)
Magnesium chloride + water
b)
Magnesium + water
c)
Magnesium chloride + hydrogen gas
d)
Magnesium chloride + water + carbon dioxide
22.
How do acidic solutions taste?
a)
Delicious
b)
Sweet
c)
Bitter
d)
Sour
23.
What is a property of bases?
a)
Slippery touch
b)
Sour taste
c)
Ability to dissolve metal
d)
Ability to form hydronium ions
24.
What are properties of acids?
a)
Bitter, slippery, ph above 7
b)
Sour, reacts with metals, ph below 7
c)
Sour, reacts with metals, ph above 7
d)
Bitter, ph of 7, does not react with metals
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