Topic: Solutions, Test No.: 07, Total MCQs: 10
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Question 1 |
3.65
grams of HCl is dissolved in 16.2 grams of water. The mole fraction of HCl in
the resulting solution is
0.4 | |
0.3 | |
0.2 | |
0.1 |
Question 2 |
One gram of
silver gets distributed between 10 cm3 of molten zinc and 100 cm3
of molten lead at 800°C. The percentage of silver still left in the lead
layer is approximately
5 | |
2 | |
1 | |
3 |
Question 3 |
Molarity of a
given orthophosphoric acid solution is 3M. It’s normality is
1 N | |
2 N | |
0.3 N | |
9 N |
Question 4 |
250 ml of
a solution carbonate solution contains 2.65 grams of Na2CO3.
If 10 ml of this solution is diluted to one litre, what is the concentration of
the resultant solution? (molecular weight of Na2CO3 =
106)
0.1 M | |
0.001 M | |
0.01 M | |
10–4 M |
Question 5 |
When 25
grams of a non-volatile solute is dissolved in 100 grams of water, the vapour
pressure is lowered by 2.25 × 10–1 mm. If the vapour pressure of water
at 20°C is 17.5 mm, what is the molecular weight of the solute?
206 | |
302 | |
350 | |
276 |
Question 6 |
Which one
is correct?
Molality changes with temperature | |
Molality does not change with temperature | |
Molarity does not change with temperature | |
Normality does not change with temperature |
Question 7 |
Concentrated
aqueous sulphuric acid is 98% H2SO4 by mass and has a
density of 1.80 g mL–1. Volume of acid required to make
one litre of 0.1 M H2SO4 is
5.55 mL | |
11.10 mL | |
16.65 mL | |
22.20 mL |
Question 8 |
Which of the
following can be measured by the Ostwald-Walker dynamic method?
Vapour pressure of the solvent | |
Relative lowering of vapour pressure | |
Lowering of vapour pressure | |
All of these |
Question 9 |
Two liquids X
and Y form an ideal solution. At 300 K, vapour pressure of the solution
containing 1 mole of X and 3 mole of Y is 550 mm Hg. At the same temperature,
if 1 mole of Y is further added to this solution, vapour pressure (in mm Hg) of
X and Y in their pure states will be respectively
200 and 300 | |
300 and 400 | |
400 and 600 | |
500 and 300 |
Question 10 |
50 cm3
of 0.2 N HCI is titrated against 0.1 N NaOH solution. The titration is
discontinued after adding 50 cm3 of NaOH. The remaining titration is
completed by adding 0.5 N KOH. The volume of KOH required for completing the
titration is ______.
10 cm3 | |
12 cm3 | |
10.5 cm3 | |
25 cm3 |
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