WorksheetsChemical Changes
Total questions: 13
Worksheet time: 7mins
Name
Class
Date
1.
What are the products of cellular respiration?
a)
carbon dioxide and oxygen
b)
carbon dioxide and water
c)
oxygen and glucose
d)
glucose and carbon dioxide
2.
Name the gas that must be present for combustion to take place.
a)
carbon dioxide
b)
hydrogen
c)
oxygen
d)
nitrogen
3.
For electrolysis of water to take place what must be present?
a)
oxygen
b)
light
c)
heat
d)
electricity
4.
Rusting is an example of a/an _______ reaction.
a)
photosynthesis
b)
oxidation
c)
thermal decomposition
d)
elctoplating
5.
What is the reaction called when sugar is heated?
a)
thermal decomposition
b)
combustion
c)
electrolysis
d)
electroplating
6.
what are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and water
c)
carbon dioxide and glucose
d)
oxygen and glucose
7.
What are the products of acid and base?
a)
salt and hydrogen gas
b)
salt and carbon dioxide gas
c)
salt and water
d)
water and hydrogen gas
8.
Name the gas when magnesium reacts with hydrochloric acid.
a)
oxygen
b)
carbon dioxide
c)
nitrogen
d)
hydrogen gas
9.
How do you test for hydrogen gas and what would you observe?
a)
burning spling;'pop' sound
b)
glowing splint; 'pop' sound
c)
limewater; turns into a white percipitate
d)
limewater; remians clear
10.
Name the gas when calcium carbonate reacts with sulfuric acid.
a)
oxygen
b)
hydrogen
c)
carbon dioxide
d)
nitrogen
11.
Name the salt when sodium reacts with nitric acid.
a)
sodium chloride
b)
sodium nitrate
c)
sodium sulfate
d)
sodium carbonate
12.
What effect does acids have on litmus paper?
a)
red litmus remains red
b)
blue litmus remians blue
c)
red litmus turns blue
d)
blue litmus turns red
13.
Acids taste _______ and alkalis taste______.
a)
sour; sour
b)
bitter; sour
c)
bitter; bitter
d)
sour; bitter
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