Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of

Byadmin August 10, 2022

Question: Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
[A].

calcium sulphate

[B].

sodium chloride

[C].

sodium sulphate

[D].

magnesium chloride.

Answer: Option B

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Environmental Engineering

Fresh domestic sewage is __________ in color.

Question: Fresh domestic sewage is __________ in color.
[A].

grey
[B].
dark brown
[C].
red
[D].
black

Answer: Option A

Explanation:

No answer description available for this question.

Read More Fresh domestic sewage is __________ in color.
Chemical Process

________________ is the major constituent of the Portland cement?

________________ is the major constituent of the Portland cement?

A. Calcium carbonate
B. Calcium oxide
C. Tricalcium silicate
D. Calcium sulphate

Read More ________________ is the major constituent of the Portland cement?
CHEMICAL ENGINEERING | Heat Transfer

A hot body will radiate heat most rapidly, if its surface is

Question: A hot body will radiate heat most rapidly, if its surface is
[A].

white & rough
[B].
black & rough
[C].
white & polished
[D].
black & polished

Answer: Option B

Explanation:

No answer description available for this question.

Read More A hot body will radiate heat most rapidly, if its surface is
CHEMICAL ENGINEERING | Chemical Engineering Thermodynamics

For an ideal gas, the activity co-efficient is

Question: For an ideal gas, the activity co-efficient is
[A].

directly proportional to pressure.
[B].
inversely proportional to pressure.
[C].
unity at all pressures.
[D].
none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Read More For an ideal gas, the activity co-efficient is
CHEMICAL ENGINEERING | Chemical Engineering Basics

Deformation band is absent in materials having __________ lattice crystal structure.

Question: Deformation band is absent in materials having __________ lattice crystal structure.
[A].

fcc
[B].
bcc
[C].
hcp
[D].
none of these

Answer: Option C

Explanation:

No answer description available for this question.

Read More Deformation band is absent in materials having __________ lattice crystal structure.
CHEMICAL ENGINEERING | Fluid Mechanics

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 103 VOM + 10.94 x 106 V2OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is

Question: A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 103 VOM + 10.94 x 106 V2OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is
[A].

12 mm/s
[B].
16 mm/s
[C].
24 mm/s
[D].
28 mm/s

Answer: Option B

Explanation:

No answer description available for this question.

Read More A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 103 VOM + 10.94 x 106 V2OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is

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