At 100 ºC and 1 atm, if the density of liquid water is 1.0 g cm–3 and that of water vapor is 0.0006 g cm-3, then the volume occupied by water molecules in 1 litre of steam at that temperature will be:
1. | 6 cm3 | 2. | 60 cm3 |
3. | 0.6 cm3 | 4. | 0.06 cm3 |
The molality of pure water is:
1. 1 m
2. 18 m
3. 55.5 m
4. None of the above
The haemoglobin from the red blood corpuscles contains approximately 0.33% iron
by mass. The molar mass of haemoglobin is 67,200. The number of iron atoms in each molecule of haemoglobin is :
(atomic mass of iron=56):
1. | 2 |
2. | 3 |
3. | 4 |
4. | 5 |
The average molar mass of the mixture of and present in the mole ratio of a:b is
20 g mol-1. When the mole ratio is reversed, the molar mass of the mixture will be:
1. | 24 gram | 2. | 42 gram |
3. | 20 gram | 4. | 15 gram |
The vapour density of a mixture containing and is 38.3. The mole of in a 100 g mixture is:
[Vapour density = (Molar mass / 2)]
1. 0.437
2. 0.347
3. 0.557
4. 0.663
25.4 g of and 14.2 g of are made to react completely to yield a mixture of ICI and ICI3. The mole of ICI and ICI3 formed, is respectively -
1. 0.5, 0.2
2. 0.1, 0.1
3. 0.1, 0.3
4. 0.3, 0.4
If 2.74 g of the metal oxide contains 1.53 g of metal, then the empirical formula of vanadium oxide is:
(Atomic Mass of V = 52)
1.
2.
3.
4.
1. | 40 mol | 2. | 10 mol |
3. | 20 mol | 4. | 30 mol |
The density of a 2 M aqueous solution of NaOH is 1.28 g/. The molality of the solution is:
[molecular mass of NaOH = 40 ]
1. | 1.20 m | 2. | 1.56 m |
3. | 1.67 m | 4. | 1.32 m |
Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL-1. The volume of acid required to make one litre of 0.1 M H2SO4 solution is:
1. 11.10 mL
2. 16.65 mL
3. 22.20 mL
4. 5.55 mL