Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure?

When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

A

Always lower than

B

Always higher than

C

Same as

D

Dependent on the system; can be either lower or higher than

India's latitudinal and longitudinal extent measured in degrees are almost the same, but its north-south extent measured in km is greater than its east-west extent. This is due to the fact that

A

Longitudes are not parallel lines

B

The distance between latitudes remains the same but the distance between longitudes is greatest at the Equator and nil at the poles where all longitudes join

C

All longitudes with their opposites form great circles

D

The earth is not a perfect sphere

Ten new television shows appeared during the month of September. Five of the shows were sitcoms, three were hour-long dramas, and two were news-magazine shows. By January, only seven of these new shows were still on the air. Five of the shows that remained were sitcoms.

A

Only one of the news-magazine shows remained on the air.

B

Only one of the hour-long dramas remained on the air.

C

At least one of the shows that was cancelled was an hour-long drama.

D

Television viewers prefer sitcoms over hour-long dramas.

In case of physical adsorption, the heat of adsorption is of the order of __________ kcal/kg.mole.

A

100

B

1000

C

10000

D

100000

In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is

A

Equal to the heat of formation of surface compound

B

Equal to the heat of wetting

C

Zero

D

Called integral heat of adsorption

All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.

A

Oxygen

B

Nitrogen

C

Air

D

Hydrogen

In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

A

Equal to

B

Less than

C

More than

D

None of these

Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

A

Mercury thermometer

B

Radiation pyrometer

C

Bimetallic thermometer

D

Thermocouple

Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by

A

Making the volume of thermometer bulb as large as conveniently possible

B

Reducing the volume of the capillary to a minimum

C

Reducing the volume of the receiving element to a minimum

D

All of the above

Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the

A

Pipe length

B

Fluid velocity in the pipe

C

Time taken to close the valve

D

All of the above

Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure?

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