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Stoichiometry problems

1. Pick out the wrong statement:
Options
A. The integral heat of solution of either components can not be calculated from heat of mixing data.
B. The average value of heat of neutralisation of dilute solutions of weak acids and bases is much less compared to that for strong acids and bases.
C. The standard heat of solution of the hydrate of a substance is the difference between the heat of solution of the anhydrous substance and its heat of hydration.
D. The accompanying enthalpy change, when a solute is dissolved in solvent, depends upon the nature & amount of the solute & the solvent, on the temperature & on the initial & final concentrations of the solution.

3. 500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.
Options
A. 650
B. 700
C. 600
D. 375

4. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
Options
A. varies linearly
B. increases
C. decreases
D. does not vary

5. In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest?
Options
A. 30 c.c acid and 30 c.c base.
B. 20 c.c acid and 25 c.c base.
C. 15 c.c acid and 35 c.c base.
D. 35 c.c acid and 15 c.c base.

8. In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is
Options
A. independent of temperature.
B. increases with rise in pressure.
C. increased with decrease in pressure.
D. unchanged with pressure changes.

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