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Chemistry Class 10 Chapter 10 - Acids, Bases and Salts - 2
1.
Which one of the following conduct electricity in aquous solution?
a) acids
b) both of these
c) none of these
d) bases
2.
The pH range for the successfull growth of tomatoes is?
a) 5.5 - 7.0
b) 5.5 - 6.5
c) 6.5 - 7.0
d) 6.0 - 7.5
3.
In an acid, when the replaceable hydrogen atoms are completly or partially replaced by metal atoms, a compound is formed known as?
a) base
b) alkali
c) salt
d) acid
4.
Phenolphthalein changes its colour at pH?
a) 9
b) 5.5
c) 7
d) 11
5.
Ammonia is a?
a) Lewis acid
b) Lewis base
c) Bronsted acid
d) Bronsted base
6.
The art that uses acid to crave patterns into metal, glass and other materials is known as?
a) Sewing
b) Painting
c) Etching
d) Welding
7.
Acids produce H + ions and bases produce OH - ions in water. This is the concept of?
a) Arrhenius
b) Lewis
c) Lowry
d) Bronsted
8.
Which one of the following is Not a true statement?
a) aluminium is toxic to fish
b) aluminium is useful to fish
c) acid rain is an environmental issue
d) acid rain damages trees
9.
When few drops of methyl orange are added to a solution, the red colour of this solution indicates pH?
a) > 4
b) < 4
c) 0
d) = 4
10.
Bronsted-Lowry theory of acids and bases was proposed in?
a) 1823
b) 1933
c) 1833
d) 1923
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