Question

1.The units of molarity is
a) mole Lit
b) mole/mol
c) mole/kg
d)gemmeqivalents/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) nA/nA+nB
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 1000lit of solution
d) 1g mole of solute in 1000 g of solvent.
7.the mole fraction for very dilut solution is
a)XA=nA/nA+nB
b)XA=nA+nB/nA
c)XA=nA/nB
d)all
8)6 moles of solute is present in 100 moles of a solution. Then the mole fraction of the solute is
b) 0.06
d) 0.94
a) 0.6
c) 0.03
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 H So solution in which the mole fraction of water is 0.85 is
a) 9.80
b) 10.50
c) 10.58
d) 11.25​

Answer 1

Answer:

1 a

2 b

3 c

4 c

5 2/5

6 a

7 a

8 0.06

9 d

10 a