Q. No.The mole fraction of glucose (C6H12O6) in an aqueous binary solution is 0.1. The mass percentage of water in it to the nearest integer is:
| 1. | 44% | 2. | 49 % |
| 3. | 47 % | 4. | 41 % |
4.5 g of a compound A (molar mass = 90 g mol⁻¹) is dissolved in water to prepare 250 mL of solution. The molarity of the solution is expressed as x × 10–1. Find the value of x:
1. Five(5)
2. Four(4)
3. Two(2)
4. One(1)
What is the mole fraction of methyl alcohol in a 5.2 molal aqueous solution of methyl alcohol?
1. 0.100
2. 0.190
3. 0.086
4. 0.050
1. 0.132 g
2. 0.481 g
3. 0.312 g
4. 0.190 g
(Round off to the nearest integer.)
1. 7
2. 10
3. 13
4. 5
A sodium chloride (NaCl) solution has a molarity of 3 M. Given that the density of the solution is 1.25 g/mL, its molality will be:
| 1. | 2.90 | 2. | 2.79 |
| 3. | 1.85 | 4. | 3.85 |
1. 3.0
2. 2.3
3. 4.0
4. 5.2
The density (in g mL–1) of a 3.60 M sulphuric acid solution that has 29% H2SO4 by mass will be:
[Nearest integer]
(Given: Molar mass of H2SO4 = 98 g mol-1)
| 1. | 1.64 | 2. | 1.88 |
| 3. | 1.22 | 4. | 1.45 |
What is the molarity of barium hydroxide solution, if 25 mL of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titre value of 35 mL.
1. 0.07
2. 0.14
3. 0.28
4. 0.35
(Molar mass of nitric acid is \(\mathrm{63~g~mol^{-1}}\))
1. 54
2. 27
3. 32
4. 48
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