Thermal conductivity of a conducting solid material depends upon its

Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?

A

CO₂

B

N₂

C

O₂

D

CO

For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally

A

Decreases

B

Increases

C

Remains unchanged

D

Increases exponentially

Thermal conductivity of a material does not depend upon its

A

Mass

B

Volume

C

Surface area

D

All of the above

For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.

A

Physical

B

Chemical

C

Both A and B

D

Neither A nor B

__________ equation relates the thermal conductivity of a solid to its temperature.

A

Antonie

B

Kopp's

C

Lee's

D

Kistyakowski

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

A

$$\frac{1}{{\text{k}}}$$

B

k

C

k²

D

$$\frac{1}{{{{\text{k}}^2}}}$$

Thermal conductivity of wood depends on

A

Moisture

B

Density

C

Temperature

D

All of the above

Thermal conductivity of solid metals with rise in temperature normally

A

Increases

B

Decreases

C

Remain constant

D

May increase or decrease depending on temperature

With increase in porosity, the thermal conductivity of a solid substance

A

Increases

B

Decreases

C

Remains unchanged

D

May increase or decrease; depends on the solid

Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.

A

Proportional to

B

Independent of

C

Inversely proportional to

D

Proportional to the square of

Thermal conductivity of a conducting solid material depends upon its

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