1. A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca : 40, Na : 23, C : 12, O : 16)
2. The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal __________ in the two phases.
3. The total number of atoms in 8.5 gm of NH3 is __________ × 1023.
4. Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing ) ?
5. Number of gm moles of solute dissolved in 1 kg of solvent is called its
6. If pH value of a solution is 8, then its pOH value will be
7. Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the
8. For estimation of heat capacity of a solid compound, one can use
9. Dissolving a solute in a solvent does not change its
10. Pick out the wrong statement.
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