1 Sri Chaitanya Schools
Worksheet VI - Chemistry
1. The units of molarity is [ ]
a) mole/Lit b) mole/mol c) mole/kg d) gmmeqivalents/kg
2. Number of moles of a solute per kilogram of a solvent is called [ ]
a) Molarity b) Molality c) Normality d) Formality
3. Some of mole fractions of all components in a solution is equal to [ ]
a) nA
+ nB
b) A
A B
n
n n
c) 1 d) 0
4. Units for mole fraction is [ ]
a) Moles b) Moles/Lit c) no units d) Equivalents/Lit
5. 60 g of urea is dissolved in 90 g of water. Then the mole fraction of solute is [ ]
a)
1
5
b)
1
6
c)
5
6
d)
4
5
6. One molal solution is one that contains [ ]
a) 1g mole of solute in 1000 g of solvent b) 1g mole of solute in 100 ml of solution
c) 1g mole of solute in 1000 lit of solution d) 1g mole of solute in 1000 g of solvent
7. The mole fraction for very dilute solution is [ ]
a)
A
A
A B
n
X
n n
b) A B
A
A
n n
X
n
c)
A
A
B
n
X
n
d) all
8. 6 moles of solute is present in 100 moles of a solution. Then the mole fraction of the solute is
[ ]
a) 0.6 b) 0.06 c) 0.03 d) 0.94
9. 0.1 g mole of urea is dissolved in 100 g of water. The molality of the solution is [ ]
a) 0.1 m b) 0.01 m c) 0.001 m d) 1.0 m
10. The molality of a H2
SO4
solution in which the mole fraction of water is 0.85 is [ ]
a) 9.80 b) 10.50 c) 10.58 d) 11.25
WORKSHEET - V
Class : VIII
Subject : Chemistry
Topic : Solutions (Goal - 5)
Answers
Answered by
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Answer:
1)mol/lit
Explanation:
2)normality
3)c)1
4)c.no units
5)
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