The condition of perfect vacuum, i.e., absolute zero pressure can be attained at

The absolute zero pressure can be attained at a temperature of

A

0°C

B

-273°C

C

273 K

D

None of these

Absolute zero pressure can be attained at a temperature of

A

0°C

B

50°K

C

0°R

D

None of these

Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.

A

1 to 5

B

30 to 80

C

250 to 350

D

450 to 500

Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).

A

5-10

B

30-80

C

150-250

D

350-400

For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume and T = Absolute temperature)

A

$$\frac{{\text{v}}}{{\text{T}}}$$ = constant, if p is kept constant

B

pv = constant, if T is kept constant

C

$$\frac{{\text{T}}}{{\text{p}}}$$ = constant, if v is kept constant

D

$$\frac{{\text{p}}}{{\text{T}}}$$ = constant, if v is kept constant

According to kinetic theory of gases, the absolute zero temperature is attained when

A

Volume of the gas is zero

B

Pressure of the gas is zero

C

Kinetic energy of the molecules is zero

D

Specific heat of gas is zero

Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at

A

High vacuum

B

Zero pressure

C

0°K

D

Earth

Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.

A

1

B

0.1

C

0.01

D

0.001

The absolute entropy for all crystalline substances at absolute zero temperature is

A

Zero

B

Negative

C

More than zero

D

Indeterminate

At absolute zero temperature, the __________ of the gas is zero.

A

Pressure

B

Volume

C

Mass

D

None of these

The condition of perfect vacuum, i.e., absolute zero pressure can be attained at

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