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Worksheetsclass 7 acid base salt
Total questions: 10
Worksheet time: 9mins
Name
Class
Date
1.
Indicator which don't show the substance is basic or neutral .
a)
Litmus paper
b)
Purple cabbage
c)
Turmeric
d)
None of these
2.
Malic acid is present in -
a)
Apple
b)
Tea
c)
Vinegar
d)
Ant
3.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
4.
The pH scale is used to determine the strength of
a)
acids and bases
b)
chemical bonds
c)
electrical charges
d)
particles in a solution
5.
All solutions that fall between 0 and 6.9 are
a)
Acids
b)
Bases
c)
Neutral
d)
Phytoplankton
6.
Salt water did not react with the Red or Blue litmus paper. This must mean
a)
Salt water is a Base
b)
Salt water is an Acid
c)
Salt water is neutral
d)
Salt water is charged
7.
Which pH level indicates a strong alkali?
a)
1-3
b)
4-6
c)
8-11
d)
12-14
8.
When an equal strength acid and base are mixed, what kind of chemical reaction occurs?
a)
Neutralization
b)
Combustion
c)
Oxdation
d)
Decomposition
9.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
10.
What property do all three of these common household substances have in common?
a)
they are all basic
b)
they taste sour
c)
they have a pH below 7
d)
they all turn litmus paper red
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