4

5 & 3

3.987 & 1.987

1.987 & 0.66

0.66 & 1.987

A. 5 & 3

4

dE = Tds - PdV

dQ = CvdT + PdV

dQ = CpdT + Vdp

Tds = dE - PdV

4

# Compound having large heat of formation is

More stable

Less stable

Not at all stable (like nascent O2)

Either more or less stable; depends on the compound

4

A = H - TS

A = E - TS

A = H + TS

None of these

4

# Work done in an adiabatic process between two states depends on the

Rate of heat transmission

Initial state only

End states only

None of these

4

0

1

y = 1.44

1.66

4

35 K

174 K

274 K

154 K

4

Mass

Momentum

Energy

None of these

4

Bomb

Separating

Bucket

Throttling

4

# If two gases have same reduced temperature and reduced pressure, then they will have the same

Volume

Mass

Critical temperature

None of these

4

# The total change in the enthalpy of a system is independent of the

Number of intermediate chemical reactions involved

Pressure and temperature

State of combination and aggregation in the beginning and at the end of the reaction

None of these

4

# Consider the process A & B shown in the figure given below: In this case, it is possible that

Both the processes are isothermal

Process A is isothermal while B is adiabatic

Process A is adiabatic while B is isothermal

4

# The equation Tds = dE - PdV applies to

Single phase fluid of varying composition

Single phase fluid of constant composition

Open as well as closed systems

Both (B) and (C)

4

# At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.

Increases

Decreases

Remains unchanged

May increase or decrease; depends on the gas

4

# In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

5.2

6.2

0.168

Data insufficient, can't be found out

4

# The expression, ΔG = nRT. ln(P2/P1), gives the free energy change

With pressure changes at constant temperature

Under reversible isothermal volume change

During heating of an ideal gas

During cooling of an ideal gas

4

Zeroth

First

Second

Third

4

J/s

J.S

J/kmol

kmol/J

4

# In the ammonia synthesis reaction, N2 + 3H2 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by

High temperature

Low pressure

Low temperature only

Both low temperature and high pressure

4

Zero

Negative

More than zero

Indeterminate

4

# Chemical potential is a/an

Extensive property

Intensive property

Force which drives the chemical system to equilibrium

Both (B) and (C)

4

# In Joule-Thomson porous plug experiment, the

Enthalpy does not remain constant

Entire apparatus is exposed to surroundings

Temperature remains constant

None of these

4

F = A + PV

F = E + A

F = A - TS

F = A + TS

4

# A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system

its internal energy (U) decreases and its entropy (S) increases

U and S both decreases

U decreases but S is constant

U is constant but S decreases

4

Isolated

Closed

Open

None of these

4

0

< 0

< 1

> 1

4

Stirling

Brayton

Rankine

Both (B) and (C)

4

Isobaric

Isenthalpic

Both (B) & (C)

4

He

N2

O2

H2

4

# __________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.

Bucket

Throttling

Separating

A combination of separating & throttling