CHEMICAL ENGINEERING

Question: The cathode in an electrochemical cell always carries
[A].

negative charge.

[B].

positive charge.

[C].

zero charge.

[D].

positive or negative charge depending upon the nature of the cell.

Answer: Option A

Explanation:

No answer description available for this question.

Question: The bulk modulus of a material with Poisson’s ratio of 0.5 is equal to
[A].

3 x Young’s modulus

[B].

Young’s modulus

[C].

infinity

[D].

zero

Answer: Option C

Explanation:

No answer description available for this question.

Question: FeO (s) + CO (g) = Fe (s) + CO2 (g), k = 0. 435 at 1173E; At equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K?
[A].

1.0

[B].

1.3

[C].

2.3

[D].

3.3

Answer: Option D

Explanation:

No answer description available for this question.

Question: For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = – 60000 J . mole-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be
[A].

30000 J

[B].

60000 J

[C].

90000 J

[D].

240000 J

Answer: Option C

Explanation:

No answer description available for this question.

Question: A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson’s ratio of the rod is
[A].

0

[B].

0.33

[C].

0.44

[D].

0.25

Answer: Option C

Explanation:

No answer description available for this question.

Question: A metal having a Poisson’s ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is
[A].

-0.8

[B].

0.8

[C].

+0.08

[D].

-0.24

Answer: Option D

Explanation:

No answer description available for this question.

Question: One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W . m-1 . k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is
[A].

100

[B].

900

[C].

9000

[D].

10000

Answer: Option D

Explanation:

No answer description available for this question.

Question: Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is
[A].

10 atm-1

[B].

105 atm-1

[C].

10 (dimensionless)

[D].

105 (dimensionless)

Answer: Option B

Explanation:

No answer description available for this question.

Question: If Reynolds number is greater than 1, then the
[A].

viscous force is larger than the inertia force.

[B].

inertia force is larger than the viscous force.

[C].

inertia force is larger than the surface tension force.

[D].

inertia force is larger than the gravitational force.

Answer: Option B

Explanation:

No answer description available for this question.

Question: At absolute zero temperature, for any reaction involving condensed phases
[A].

Δ G° = 0 , Δ H° = 0

[B].

Δ H° = 0 , Δ S° = 0

[C].

Δ S° = 0 , Δ E° = 0

[D].

Δ S° = 0 , Δ Cp° = 0

Answer: Option C

Explanation:

No answer description available for this question.