A. 4.4
B. 5.6
C. 8.4
D. 2.4
Related Mcqs:
- The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?
A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/T1 - Diffusion co-efficient of a metal in a solid solution depends upon its ?
A. Composition
B. Temperature
C. Both A. & B.
D. Neither A. nor B. - The two elements required to form substitutional solid solution should not have___________________?
A. Same crystalline structure
B. Same valency
C. Widely differing electronegativity
D. Same atomic sizes - Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution ?
A. A1 is more alkaline than solution A2
B. A1 is highly acidic
C. A2 is very slightly acidic
D. Both B. & C. - Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is_______________?
A. R ln 2
B. -R ln 2
C. 3 R ln 2
D. -3R ln 2 - The activity co-efficient of the solute in a dilute solution ?
A. Decreases with the increase of concentration of the solute
B. Increases with the increase of concentration of the solute
C. Remains constant
D. Is unity at infinite dilution - What happens, when SO2 is passed through a solution of H2S in water ?
A. Precipitation of sulphur takes place
B. H2SO3 is formed
C. Oleum is formed
D. None of these - For a first order chemical reaction, the concentration of the reactant decreases __________________ with time?
A. Linearly
B. Exponentially
C. Logarithmically
D. Inversely - The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by __________________?
A. y2 = 2k1t + k2
B. y = k1 ln (k2t + k3)
C. y = k1 t + k2
D. y = k1t3 + k2 - For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by__________________?
A. (ε1 + ε2)/ε1.ε2
B. ε1.ε2/(ε1 + ε2 – ε1.ε2)
C. ε1.ε2
D. ε1 + ε2
