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.Management Sciences
Category: Stoichiometry
Pick out the wrong unit conversion of thermal conductivity ?
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A. 1 BTU/ft2.hr.°F/ft = 1.488 kcal/m2. hr.°C/m
B. 1 BTU/ft2.hr.°F/inch = 1.488 kcal/m2. hr.°C/m
C. 1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K
D. 1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F
The value of (Cp – Cv) for a real gas obeying Vander Wall’s equation is____________________?
A. R
B. > R
C. < R
D. 0.5 R
Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?
A. Vapor to liquid
B. Vapor to solid
C. Solid to liquid
D. One allotropic form to another allotropic form
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?
A. PvB
B. xB.PvB
C. (Patm – Pvw)xB
D. xB.Patm
1 gm mole of methane (CH4) contains_________________?
A. 6.02 × 1023 atoms of hydrogen
B. 4 gm atoms of hydrogen
C. 3.01 × 1023 molecules of methane
D. 3 gms of carbon
Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the______________________?
A. Same elevation in boiling point
B. Different elevation in boiling point
C. Elevation in boiling point in the ratio of their molecular weights
D. None of these
The increase in the temperature of the aqueous solution will result in decrease of its________________?
A. Weight % of the solute
B. Mole fraction of the solute
C. Molarity
D. Molality
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