Practice Exams ChE - 14

1. A carnot engine with thermal efficiency of 40% rejects 3000 KJ at a temperature of 1200 degC. The combustion of 1 L gasoline (sp. gr. = 0.8, cv = 46.8 KJ/g) furnishes heat to the engine. The maximum work done by the engine is
a. 5000 KJ
b. 3000 KJ
c. 2000 KJ
d. 10,000 KJ
e. none of the above

2. The percent sulfur in barium sulfate is:
a. 34.30
b. 13.74
c. 58.85
d. 65.70
e. 76

3. Which of the following is incorrectly named?
a. p-chloro aniline
b. 3-methyl pentane
c. methylbenzene
d. ethyl benzene
e. 2-ethyl butane

4. In the reaction H2O2 + KI -> KOH + I2, hydrogen peroxide acts as:
a. catalyst
b. oxidizing agent
c. solvent
d. reducing agent
e. none of the above

5. The Volhard method, a volumetric technique for the determination of silver, uses which of the following indicators?
a. Eosin
b. Fluorescein
c. Ferric Alum
d. Potassium Chromate
e. Ferroin

6. The proper sequence of steps for the conversion of benzene to 3-nitro toluene is:
a. nitration, then Friedel Crafts Alkylation
b. Friedel Crafts Alkylation, then nitration
c. Simultaneous nitration and alkylation
d. Any order will do
e. None of the above

7. The state of a thermodynamic system is always defined by its
a. absolute temperature
b. process
c. degrees of freedom
d. nature
e. none of the above

8. Following Markonikoff rule, when 1 butene is reacted with HOCl, the main product is:
a. n-butane
b. 1-chloro-2-butanol
c. 2-butanol
d. 2-chloro-3-butanol
e. 2-chloro butane

9. Equation of state for a single component can be any of the following except
a. ideal gas law
b. Z=PVm/RT
c. Any relationship interrelating 3 or more state functions
d. A mathematical expression defining a path between states
e. None of the above

10. The percent of MnO2 (MW=86.94) in a 0.5 gram sample, which after addition of 50.0 mL of 0.1 N ferrous sulfate solution required 16.0 mL 0.08 N potassium dichromate for back titration.
a. 16.17
b. 32.34
c. 48.51
d. 64.68
e. 40