Chemical Engineering

Question: Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?
[A].

Air cycle

[B].

Carnot cycle

[C].

Ordinary vapour compression cycle

[D].

Vapour compression with a reversible expansion engine

Answer: Option A

Explanation:

No answer description available for this question.

Question: Joule-Thomson Co-efficient at any point on the inversion curve is
[A].

∞

[B].

+ ve

[C].

0

[D].

-ve

Answer: Option C

Explanation:

No answer description available for this question.

Question: Joule-Thomson co-efficient depends on the
[A].

pressure.

[B].

temperature.

[C].

both (a) & (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: For the gaseous phase chemical reaction, C2H4(g) + H2O(g) C2H5OH(g), the equilibrium conversion does not depend on the
[A].

steam to ethylene ratio.

[B].

temperature.

[C].

pressure.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Mollier chart is a __________ plot.
[A].

pressure vs enthalpy

[B].

pressure vs volume

[C].

enthalpy vs entropy

[D].

temperature vs entropy

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a P-V diagram (for an ideal gas), an isothermal curve will coincide withan adiabatic curve (through a point), when
[A].

Cp < Cv

[B].

Cp = Cv

[C].

Cp > Cv

[D].

C ≥ Cv

Answer: Option B

Explanation:

No answer description available for this question.

Question: Any substance above its critical temperature exists as
[A].

saturated vapour

[B].

solid

[C].

gas

[D].

liquid

Answer: Option C

Explanation:

No answer description available for this question.

Question: At absolute zero temperature, the __________ of the gas is zero.
[A].

pressure

[B].

volume

[C].

mass

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O CO2 + H2, by
[A].

low temperature and high pressure.

[B].

low temperature and low pressure.

[C].

high temperature and high pressure.

[D].

high temperature and low pressure.

Answer: Option A

Explanation:

No answer description available for this question.

Question: After throttling, gas temperature
[A].

decreases

[B].

increases

[C].

remains same

[D].

may increase or decrease ; depends on the nature of the gas

Answer: Option A

Explanation:

No answer description available for this question.