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.Management Sciences
Category: Stoichiometry
Pick out the wrong statement?
A. Atomic heat capacities of the crystalline solid elements are nearly constant and equal to 6.2 kcal/kg-atom according to the law of Petit and Dulong
B. Atomic heat capacities of all solid elements decrease greatly with decrease in temperature, approaching a value of zero at absolute zero temperature, when in the crystalline state
C. Generally, the heat capacities of compounds are lower in the liquid than in the solid state
D. The heat capacity of a heterogeneous mixture is an additive property, but when solutions are formed, this additive property may no longer exist
At higher temperatures, molal heat capacities for most of the gases (at constant pressure) _______________ with increase in temperature?
A. Varies linearly
B. Increases
C. Decreases
D. Does not vary
“The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?
A. Law of Petit and Dulong
B. Kopp’s rule
C. Nernst heat theorem
D. Trouton’s rule
Which of the following gravity scales is used exclusively for liquids heavier than water ?
A. Baume scale
B. Twaddell scale
C. API scale
D. None of these
A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container___________________?
A. Will be greater than 298 K
B. Will be 298 K
C. Will be less than 298 K
D. Cannot be determined
A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?
A. 3 kmole/hr
B. 4 kmole/hr
C. 5 kmole/hr
D. 6 kmole/hr
Two solutions A1 and A2 have pH value of 2 and 6 respectively. It implies that the solution_____________________?
A. A2 is more alkaline than solution A2
B. A1 is highly acidic
C. A1 is very slightly acidic
D. Both A. & C.
Which of the following ideal gas laws are not applicable to mixture of gases ?
A. Amagat’s law
B. Dalton’s law
C. Boyle’s law & Charle’s Law
D. None of these
Real gases approach ideal behaviour at___________________?
A. High pressure & high temperature
B. Low pressure & high temperature
C. High pressure & low temperature
D. Low pressure & low temperature
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