What are green gases? Does water release green gas? How green gas effects on temperature? How is plaster of Paris made? Is combustion is a Unit Operation or Unit Process or nothing?

ashwin

• Dec 7th, 2015

Gas in an atmosphere that absorbs and emits radiation within the thermal infrared range is greenhouse gas like methane, CO2 etc... Yes, water releases green gas, water vapor is most dominant green ga...

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When standard hydrogen electrode is compared with Cu and Fe respectively which will act as anode and which will be cathode? and Why?

Nkosenhle

• May 21st, 2016

Cu will be a cathode and Fe will be an anode, because electrons move from Cu through the salt bridge to Fe

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What is the effect of pressure in the Distillation Operation? It is also said that when the vapor pressure of the liquid component equals the atmospheric pressure, boiling occurs; can anyone give me an example for this type of Distillation?Thank you

Sina Salimi

• May 30th, 2016

Increasing pressure makes separation harder, because it decreases relative volatility

rohit

• Sep 3rd, 2011

If we increase the pressure, the no. of stages in a distillation column becomes less as the liquid boils earlier (boiling occurs when the atmospheric pressure becomes equal to the vapour pressure of the liquid.)

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When Standard Hydrogen Electrode is compared with Cu it is first cell and when Standard Hydrogen Electrode is compared with Fe. in first cell which will act as anode or cathode and in 2nd cell which will act as anode or cathode and why?

nani

• Jun 25th, 2016

First Cu and Zn are called half cells in Daniel cell.
SHE is the measurement of electrode potential we cant directly measure EP. For that we fix one half cell hydrogen anode and other may be Fe Cu Is cathode are in vice versa.

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What is difference between micro-organisms & micro pollutants?

omenli collins

• Oct 13th, 2016

Micro-organism exists internally and can be destroyed at high temperature. It performs multiple functions, it can cause harmful diseases but can also help to enrich the soil. It is a living thing. M...

Khalid I Jamadar

• Jun 1st, 2016

A microorganism or microbe is an organism which is too small to be seen by the unaided human eye. They are microscopic. The study of microorganisms is called microbiology. Microorganisms include bacteria, fungi, archaea or protists and viruses.

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Why storage tank maximum height is 20m? Where else one can vary diameter of it, yes or no!

pravin javheri

• Oct 24th, 2016

Wind load can be assumed to be negligible upto 20m height. So, to avoid stresses (due to wind) to develop in the tank, maximum height is 20m. Increment in the diameter needs to consider some other factors like types of supports used, actual height, etc..

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What is the important properties of biodegradable plastics?
Which properties helps plastics to resist water?

VIVEK32043

 Profile Answers by VIVEK32043 Questions by VIVEK32043

• Jan 25th, 2017

Biodegradable polymers are those which are decomposed after their useful service life to end products like minerals, oxygen, etc. with the help of micro organisms under normal environmental conditions.

Khalid Ibrahim Jamadar

• May 24th, 2016

Biodegradable polymers, have extremely strong carbon backbones that are difficult to break, such that degradation often starts from the end-groups. Since the degradation begins at the end, a high surf...

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The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is, less or more? Can any one help me out with an explanation...

Nandita Baral

• Mar 20th, 2017

The COP of a Refrigerator/AC would be given by expression: COP = (Cooling Effect/Power Input). The cooling effect produced by a refrigerator is obviously more for a refrigerator. At the same time th...

sunny vanza

• Feb 21st, 2016

It is less.

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What are cocurrent and countercurrent of fluid streams?

Parth joshi

• May 30th, 2017

In cocourrent stream both of fluid flow in the same direction and in counter current stream both of fluid are flowing in opposite direction.

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I have a liquid mixture in a bottle containing different synthetic substances dissolved from their salt forms (i.e. lidocaine hydrochloride, anhydrous caffeine). These compounds are dissolved in distilled water.
So the question is: How can I separate the dissolved solids from the aqueous solution? Can I do it by forming a hydrochloride precipitate by adding some hydrochloric acid? Or, say the...

Nilesh

• Jun 29th, 2017

In case of solids the lighter solids can be separated by decanting it in water medium when both of the solids are ... Distillation can also be used to separate dissolved salts from their aqueous solutions.

rockky

• Apr 27th, 2017

By evaporation and distillation process. Through many evaporator series to find the Liqueur or product that you need

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What is corrosion? Which is the most important material used for metallic coating?

rasika

• Jul 2nd, 2017

Corrosion is the destruction in the metal due to oxidation with atmospheric air
aluminium(Al) is material

Deepak Mishra

• Jun 8th, 2017

The most important material used for coating is Zinc (due to its sacrificial property)

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vikas

• Jul 9th, 2017

Because distillation depends on volatility of component and toluene is a more volatile than water.

Pritam Jadhav

• May 4th, 2017

Because the boiling point of water is higher than toluene.
Thus toluene is more volatile liquid, therefore it comes out first.

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Explain What is Organic Chemistry?

Kingsuk Karmakar

• Jul 13th, 2017

It is the branch or part of Chemistry in which we concern with the compound of carbon. Originally confined to compound to produced by living things.

ankit

• Apr 20th, 2017

Organic chemistry is branch of chemistry which deals with carbon compound

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Kingsuk Karmakar

• Jul 13th, 2017

Water density is 1 and Benzene density is 0.8765 and they are both immiscible liquid or small amount miscible (1.84 g/l). If any mixture solution contain water and benzene, water settle in lower layer (because water have higher density then benzene) and benzene present in upper layer.

Dhaval

• Jan 12th, 2017

First one is that we have two liquids 1. Water & 2. Benzene Benzene is insoluble in water. Thus both liquid solutions are immiscible. We know that We have extraction process during which the 2 liquid...

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What is use of Reynolds number in designing of Heat exchange?

Dhruv

• Jul 17th, 2017

Use for determination of Shell side and tube side heat transfer coefficient, pressure drop, selection of tube side and shell side process fluid,

D.S.

• Apr 17th, 2017

The Reynolds number is first used to understand what flow regime (i.e. turbulent, transition zone, laminar). It is then used to calculate the shell-side and tube-side film coefficients which are then used to calculate an overall U.

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What is the basis of choosing the shell side and tube side fluid?

Kingsuk Karmakar

• Aug 4th, 2017

If your process fluid is corrosive nature then you have choose flow in tube side. Because if fluid damage the tube it has been replace is easier and less cheaper then shell side. 2. The toxic and haza...

Sankar

• May 23rd, 2016

Tubes can be easily detached from the main body of a heat exchanger. Therefore, in case of corrosive fluid its more convenient to use it in the tube side.

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What is 3rd Law of Thermodynamics?

Bandana

• Aug 4th, 2017

At absolute 0 degree entropy of a substance is zero, as entropy is a measurement of degree of randomness.

Kingsuk Karmakar

• Aug 2nd, 2017

The entropy of a perfectly crystalline substance at zero K or absolute zero is taken to be zero.
This law is only applicable for perfectly crystalline substance. If there is imperfection at 0 K, the will be larger then zero.

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What is the difference between Filtration and Sedimentation?

Mani

• Sep 7th, 2017

Sedimentation is a separation of particles depending upon their density whereas filtration is a separation of particles depending upon particle size.

Ravi

• Jul 5th, 2017

Sedimentation is the separation of solids from liquids by gravitational method where as filtration is the separation of solids from liquids by filter medium

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divakarnaik822

• Sep 10th, 2017

Unit operation is the basic step in any chemical engineering related fields, in this operation only physical changes are occurred but not chemical changes
Ex:-heating, cooling, evaporation, sedimentation

Akash shrama

• Aug 13th, 2017

Each chemical process frequently consists of a fewer number of distinct individual step.

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What is the role of software in process equipment design and what software should one refer to while dealing with related problems?

Aakash

• Sep 17th, 2017

Software are necessary because they are used in simulation of a process for example to find out the composition of distillate and bottom product of distillation column and we can also vary the number ...

Sandeep cheekati

• Mar 14th, 2016

We can use Dynochem, Visimix, Aspen plus

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