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Physical Chemistry -- Gaseous State
16.
Given the reaction C(s) + H2O(l) → CO(g) + H2(g)
calculate the volume of the gases produced at stp from 48.0 g of carbon
- A.179.2 L
- B.89.6 L
- C.44.8 L
- D.22.4 L
- Answer
- Report
Answer : [A]
17.
Calculate the percentage of NO2 by weight in N2O2 (a dimer of NO2) which has a vapour density of 36.
- A.27.7
- B.67.7
- C.37.7
- D.25.7
- Answer
- Report
Answer : [A]
18.
A preweighed vessel was filled with CO2 at stp and weighed. It was then
evacuated, filled with SO2 at the same temperature and pressure and
again weighed. The weight of the CO2will be
- A.the same as that of the SO2
- B.twice that of the SO2
- C.half that of the SO2
- D.one-fourth that of the SO2
- Answer
- Report
Answer : [C]
19.
The vapour pressure of water at 80oC is 355 mm of Hg. A 100-mL vessel
contains water saturated with O2 at 80oC, the total pressure being 760
mm of Hg. The contents of the vessel were pumped into a 50-mL vessel
at the same temperature. What is the partial pressure of O2?
- A.1115 mm
- B.810 mm
- C.405 mm
- D.355 mm
- Answer
- Report
Answer : [B]
20.
A bottle of dry ammonia and one of dry hydrogen chloride are connected
through a long tube. The stoppers at both ends of the tube are opened
simultaneously. The white ammonium chloride ring first formed will be
- A.at the centre of the tube
- B.near the hydrogen chloride bottle
- C.near the ammonia bottle
- D.throughout the length of the tube
- Answer
- Report
Answer : [B]
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