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Chemistry - 9 Chapter - 9
Acids, Bases and Salts
Test - 7
1.
Define molarity?
a) The concentration of a solution can be expressed in terms of molarity and the molarity of a solution is the number of moles of the solute present in one dm3 of solution
b) The concentration of a solution can be expressed in terms of molarity and the molarity of a solution is the number of solutes present in one dm3 of solution
2.
What is titration?
a) Titration is finding out the volume of a solution of unknown molarity by reaction of a solution of known molarity with another solution of known molarity.
b) Titration is finding out the volume of a solution of unknown molarity by reaction of a solution of known molarity with a solution of unknown molarity.
3.
How is molarity of acid or base determined?
a) The molarity of an acid or a base can be determined by titration
b) By dipping pH paper
4.
Titration is finding out the volume of a solution of _______molarity by reaction of a solution of known molarity with a solution of unknown molarity.
a) Unkown, unknown
b) Known, unknown
c) Unkown, known
5.
A solution with a known molarity is called a standard solution.
a) True
b) False
6.
What all should be known for the preparation of standard solution?
a) Mass of the solution and total volume of the solution
b) Mass of the solute and total volume of the solution
7.
For the preparation of standard solution, volume of the solute and total mass of the solution should be known.
a) False
b) True
8.
Citric acid is present in?
a) Lemon
b) Grapes and tamarined
c) Stongs of insects like honey bees
d) Sour milk
9.
Tartaric acid is present in?
a) lemon
b) grapes and tamarind
c) sour milk
d) stings of insects like honey bee
10.
Lactic acid is present in?
a) Grapes and tamarined
b) Lemon
c) Sour milk
d) Stings of insects like honey bees
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