Answer / dhaval modh

unit operation means the operation in which only physical
change occur not chemical.ex.fluid operation,mechanical
operation,heat tranfer operation, mass tranfer
operation.ie.distillation,drying,adsorption etc......

Answer / darshan jagatap

MAIN CHARACTERISTICS OF UNIT OPERATIONS IS THERE IS ONLY
PHYSICAL CHANGE (PHASE CHANGE) AND NO REACTIONS

CHARACTERISTICS:

PHASE CHANGE IS TOBE OBTAINED BY MAINTAING THE PARAMETERS
SUCH AS TEMP, PRESSURE, FLOW, LEVEL ETC

Answer / alok kumar

basically fluid machanics ,heat transfer operation operation
,mass transfer comes in catagory of unit operations.
the basic thing is that during 1 or more unit operations
there is no chemical composition change occur only physical
changes such as temp. etc. change.

Answer / ritam

The maint terms in unit operations are Distillation,
crystallization, leaching, and drying etc.

Answer / praveen peda

main unit operations are DISTILLATION,
DRYING ,LEACHING,ABSORPTION, ADSORPTION,etc

Answer / anusha

the main terms of unit operations are-
drying
size reduction
distillation
evaporation
crystallisation

Answer / nimesh patel

Unit operatons means operation in which physical changes
takes place.
e.g. Drying, extraction

Answer / nisha sharma

basic laws, molecular units, mole fraction, gas laws,
primary and secondary quantities, dimensional formulas,
dimensions, dimensionless equations,dimensional
analysis,graphical integration, all expressions to express
concentration like molarity, molality,etc.

Question 104 - In photoelectrical effect analysis of quantum chemistry, let E = kinetic energy of electron, p = intensity of UV light, f = frequency of UV light. According to Classical Theory, E = c for all values of f, E = mp. According to Quantum Theory, E = c for all values of p, E = mf + c. In a graph, m and c are constants where m is slope and c is y intercept. If m = 2 and c = 3 with similar value of E : (a) find the value of p according to Classical Theory; (b) find the value of f according to Quantum Theory.

1 Answers  

plz somebody send me the latest placement papers of hpcl graduate trainee post.....at bikash.mallick1@gmail.com

0 Answers  

What are the steps involved in wine making?

2 Answers   Aramco,

Why does a fractionating column does not catch fire even though it operates at temperature greater than 400 degree C ?

5 Answers   ONGC,

I HAVE DOMAIN KNOWLEDGE IN PROCESS MANUFACTURINGAND I GOT AN APPARTUNITY AS A BUSINESS ANALYST AND I DNT HAVE ANY KNOWLEDGE ON ORACLE APPS/GIVE ME ANY VALUBLE SUGGESTION?

0 Answers   Satyam,

could any one plzz give me the placement tech papers taken by iocl,and bpcl in chemical stream..... my id is.... mishra.gaurang@gmail.com

0 Answers  

In differential centrifugation of cells with diameter D in centimeter, the square of D is given by D x D = [18n ln (RF / RI) ] / [ (RP – RFF) Wt ] where n is the fluid viscosity (poise), RF is the final radius of rotation (cm), RI is the initial radius of rotation (cm), RP is cell density (g/ml), RFF is the fluid density (g/ml), W the square for the rotational velocity in (radians / s) (radians / s), t is the time required to sediment from RI to RF (s). Derive an equation for W as a function for D, n, RF, RI, RP, RFF and t, with the stated units above, in radian

1 Answers  

Explain the working of a spray condenser?

0 Answers  

CHEMICAL MATERIAL BALANCE - EXAMPLE 2.5 : In a non-dilute absorber, the inlet gas stream consists of 8 mol % carbon dioxide in nitrogen. By contact with room temperature water at atmospheric pressure, 65 % of the carbon dioxide from a gas stream has been removed. (a) Find the mole ratio of carbon dioxide and nitrogen gases at inlet and outlet gas streams. (b) The Henry's Law provides y = 1640 x for carbon dioxide in water. Find the mole ratio when x = 0.0000427. Mole ratio is y / (1 - y) for y.

1 Answers  

Question 54 - There are 2 alternatives of investment. Choice 1 : A trader offers you an investment opportunity where your investment of A$15000 presently will be A$18000 after 4 years. Choice 2 : A bank offers you 5 % annual return for your initial investment of A$15000. Question a : What is the equivalent bank payment after 4 years? Question b : By using the concept of equivalence in engineering economy, which is the better choice, betwen 1 and 2, that will be more profitable after 4 years?

1 Answers  

Define condensate lift?

0 Answers  

BIOPROCESS ENGINEERING - EXAMPLE 14.2 : An aqueous solution with 2.5 g of a protein dissolved in 600 cubic centimeters of a solution at 20 degree Celsius was placed in a container that has a water-permeable membrane. Water permeated through the membrane until the h - level of the solution was 0.9 cm above the pure water. (a) Calculate the absolute temperature of the solution, T in Kelvin, where T (Kelvin) = T (degree Celsius) + 273.15. (b) Calculate the osmotic pressure, P of the solution by using the formula P = hrg where h is level of the solution, r is density of water with 1000 kg per cubic meter, g = 9.81 N / kg as gravitational acceleration. (c) Calculate the concentration of the protein solution, C in kg / cubic meter. (d) Calculate the molecular weight of the protein, (MW) = CRT / P where R = 8.314 Pa cubic meter / (mol K) as ideal gas constant.

1 Answers