Knowledge in engineering chemistry
engineering chemistry mid term 2 papers
this document contains mid term 2 test papers of Engineering chemistry , papers are standard. and very useful.
Pradhumn Sharma
engineering chemistry mid term 1 test papers
this document contains mid term 1 test papers of Engineering chemistry , papers are standard. and very useful.
engineering chemistry rgpv 2019 paper
This document contains chemistry paper of year 2019 of rgpv, 1 sem, this paper covers basic concepts of water, polymers, spectrophotometry etc.
Dyes - Engineering Chemistry
These are the notes of the subject Chemistry for engineering and are targeted to one of the difficult subtopics of Dyes. These will prove beneficial to FY Engineering students of all branches and help them to score good marks in their exams.
VEDANT MILIND ATHAVALE
Biogas and Biomass- EC
These are the notes of the subject Chemistry for engineering and are targeted to one of the difficult subtopics of Biogas and Biomass. These will prove beneficial to both FY Engineering students of all branches and help them to score good marks in their exams. • Traditionally, biomass had been utilized through direct combustion. Cow dung cake is one of the most important and widely used biomass for the production of daily energy needs. It has been estimated that 2.5 billion people around the world are not being able to access modern fuels. They are highly dependable on locally available wood and cow dung cakes. • About nine-tenth of the rural households in India uses traditional biomass-wood and dung-as a household fuel annually. Burning of biomass or cow dung cakes through direct combustion creates indoor air pollution and ultimately contributing to serious health problems, particularly cancer and respiratory infections. • Approximately half a million premature deaths and nearly 500 million cases of illness are estimated to occur annually as a result of exposure to smoke emissions from biomass use by households in India, making indoor pollution the third leading health risk factor. • Biogas represents a renewable source of energy that derives mainly from the decomposition of organic wastes in the absence of oxygen. In India, biogas mainly produced from cattle dung.
CRYSTAL STRUCTURE CHEMISTRY
This pdf contains important Theory based on CRYSTAL STRUCTURE CHEMISTRY
yash kothane
COMPOSITE MATERIALS
These are the notes of the subject CHEMISTRY for engineering and are targeted to one of the difficult subtopics of COMPOSITE. These will prove beneficial to both FY and SY Engineering students of all branches and help them to score good marks in their exams. Made by: A PROFESSOR/STUDENT AT VJTI
FLAME PHOTOMETRY
Flame photometry is the measurement of the emission of radiation by neutral atoms, which tells us about the concentration of that particular element in a given sample. The earliest reference was in 1556 when Georgius Agricola mentioned "colors of fumes" produced by ore samples. In the 19th century new improvements and developments became significant. In 1873, Champion, Pellet, and Grenier invented the flame photometer.
BEER LAMBERTS LAW
1 1. A solution of Tryptophan has an absorbance at 280 nm of 0.54 in a 0.5 cm length cuvette. Given the absorbance coefficient of trp is 6.4 × 103 LMol-1cm-1 What is the concentration of a solution? Solution: As A = ε l c l= 0.5 cm A= 0.54 ε = 6.4 × 103 LMol-1cm-1 C=? So c = A/ε l = 0.54 / 6.4 × 103 × 0.5 Answer = 0.000168 M 2. Calculate the molar absorptivity of a 1 x 10-4 M solution, which has an absorbance of 0.20, when the path length is 2.5 cm. Solution: A = ε l c l= 2.5 cm A= 0.20 C= 1 x 10 – 4 M ε =? So ε = A / l c = 0.20/ 2.5 ×1 x 10-4 Answer = 800 dm3 /mol/cm. 2 3. The molar absorptivity of a 0.5 x 10-3 M solution is 261.53 dm3 /mol/cm, If it has an absorbance of 0.17, Calculate the path length. Solution: A = ε l c ε = 261.53 dm3 /mol/cm A= 0.17 C= 0.5 x 10-3 M l = ? So l = A / ε c = 0.17/ (261.53 × 0.5 x 10-3) Answer = 1.3 cm. 4. A 1.00 × 10–4 M solution of an analyte is placed in a sample cell with a path length of 1.00 cm. When measured at a wavelength of 350 nm, the solution’s absorbance is 0.139. What is the analyte’s molar absorptivity at this wavelength? l = 1.00 cm c = 1.00 × 10–4 M A=0.139 ε =? So A = ε l c ε = A / l c = 0.139/ 1.0 × 1.00 x 10-4 Answer = 1390 cm−1 M−1
SUPERCONDUCTIVITY BY DR PAUL
Superconductivity is the set of physical properties observed in certain materials, wherein electrical resistance vanishes and from which magnetic flux fields are expelled. Any material exhibiting these properties is a superconductor. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero. An electric current through a loop of superconducting wire can persist indefinitely with no power source.
WASTE WATER TREATMENT
Wastewater treatment is a process used to remove contaminants from wastewater or sewage and convert it into an effluent that can be returned to the water cycle with minimum impact on the environment, or directly reused. The latter is called water reclamation because treated wastewater can be used for other purposes. The treatment process takes place in a wastewater treatment plant, often referred to as a Water Resource Recovery Facility or a Sewage Treatment Plant. Pollutants in municipal wastewater are removed or broken down.
CO-ORDINATION COMPOUNDS
Metals only exist in solution as coordination complexes, it follows then that this class of compounds is useful in a wide variety of ways. In bioinorganic chemistry and bioorganometallic chemistry, coordination complexes serve either structural or catalytic functions. An estimated 30% of proteins contain metal ions. Examples include the intensely colored vitamin B12, the heme group in hemoglobin, the cytochromes, the chlorin group in chlorophyll, and carboxypeptidase, a hydrolytic enzyme important indigestion. Another complexion enzyme is catalase, which decomposes the cell's waste hydrogen peroxide. Homogeneous catalysis is a major application of coordination compounds for the production of organic substances. Processes include hydrogenation, hydroformylation, oxidation. In one example, a combination of titanium trichloride and triethylaluminium gives rise to Ziegler–Natta catalysts, used for the polymerization of ethylene and propylene to give polymers of great commercial importance as fibers, films, and plastics. Nickel, cobalt, and copper can be extracted using hydrometallurgical processes involving complexions. They are extracted from their ores as ammine complexes. Metals can also be separated using the selective precipitation and solubility of complexions. Cyanide is used chiefly for the extraction of gold and silver from their ores.