Concentrated nitric acid is 70% HNO3. The amount of concentrated nitric acid solution that should be used to prepare 250 mL of 2.0 M HNO3 would be:
1. 90.0 g conc. HNO3
2. 70.0 g conc. HNO3
3. 54.0 g conc. HNO3
4. 45.0 g conc. HNO3
The mole fraction of the solute in a 1.00 molal aqueous solution is:
1. | 0.00177 | 2. | 0.0344 |
3. | 0.0177 | 4. | 0.1770 |
The molality of a 15% (w/vol.) solution of H2SO4 of density 1.1g/cm3 is-
1. 1.2
2. 1.4
3. 1.8
4. 1.6
Which mode of expressing concentration is independent of temperature?
1. Molality
2. Percent by mass
3. Mole fraction
4. All of the above
A partially dried clay mineral contains 8% water. The original sample contained 12% water and 45% silica. The percentage of silica in the partially dried sample is nearly:
1. | 50% | 2. | 49% |
3. | 55% | 4. | 47% |
Equal volumes of 0.1 M AgNO3 and 0.2 M NaCl are mixed. The concentration of N ions in the mixture will be:
1. | 0.1M | 2. | 0.05M |
3. | 0.2M | 4. | 0.15M |
The molality of 1M solution of NaCl ( specific gravity 1.0585 g/mL ) is:
1. 1.0585
2. 1.0
3. 0.10
4. 0.0585
The total molarity of all the ions present in 0.1 M of CuSO4 and 0.1 M of Al2(SO4)3 solution is:
1. 0.2M
2. 0.7M
3. 0.8M
4. 1.2M
A 0.1097 gm sample of As2O3 require 26.10 ml of KMnO4 solution for its titration. The molarity of KMnO4 solution is
1. 0.02
2. 0.04
3. 0.018
4. 0.3
The molality of a 20% (by mass) CaCO3 solution is :
(Given: Density of solution is 1.2 gm/ml)
1. | 1.25 m | 2. | 2.5 m |
3. | 2.08 m | 4. | 1.5 m |