#engineering chemistry 2
- Describe the types of oxide film formed in oxidation corrosion The extent of corrosion depends upon the type of oxide film formed by metals. Oxide films formed are classified into three categories, Stabl... 2
- What are the Characteristics of electromagnetic radiations? Characteristics of electromagnetic radiations: Wavelength: It may be defined as the distance between two neighbouring crests or troughs of w... 2
- Explain any 2 types of wet corrosion with diagram and reactions The corrosion which is brought about through ionic reaction in presence of moisture or solution as a conducting medium is called (wet) elect... 2
- What is the principle of spectroscopy? The basic principle shared by all spectroscopic techniques is to shine a beam of electromagnetic radiation onto a sample, and observe how it... 1
- Sacrificial anode method In this protection method, the metallic structure to be protected is connected by a wire to a more anodic metal, so that all the corrosion i... 1
- Distinguish between Electrolytic cell and Voltaic Cell Characteristic Electrolytic Cell Voltaic Cell Purpose To drive a non-spontaneous chemical reaction by using an external electrical energy so... 2
- Q1) Define a) corrosion b) electrode potential c) electrochemical cell d) wavelength e) electroplating a) corrosion Destruction or deterioration or disintegration of a metal by chemical or electrochemical reaction with its environment is calle... 2
- Describe the phenomena of Fluorescence and Phosphorescence. Fluorescence and phosphorescence are both optical phenomena involving the emission of light by certain substances when they absorb energy fr... 1
- Give the advantages of spectroscopic techniques Identification and characterization of substances. Accurate quantitative analysis. Non-destructive analysis. Versatility across different sa... 1
- Name the different types of molecular spectroscopy. Explain NMR spectroscopy Infrared (IR) Spectroscopy: This technique analyzes the absorption and transmission of infrared radiation to study molecular vibrations and... 1
- Write a note on electromagnetic spectrum Answer: the electromagnetic spectrum is the complete range of electromagnetic radiation arranged in order of wavelength (or frequency), from... 1
- Give the different types of electrochemical cell .Explain any 2 Answer: electrochemical cells are of two main types: (1) galvanic (voltaic) cells, which convert chemical energy into electrical energy, and... 1
- Write a note on calomel electrode Answer: the calomel electrode is a secondary reference electrode made of mercury in contact with mercurous chloride (calomel, Hg₂Cl₂ ) and a... 1
- Define standard electrode potential Answer: the standard electrode potential ( E^° ) of an electrode is its potential measured relative to the standard hydrogen electrode (SHE,... 1
- What is Cathodic protection? Explain impressed current method with diagram The principle involved in this method is to force the metal to be protected to behave like a cathode, thereby corrosion does not occur. Ther... 1
- Write short notes on Pitting corrosion b) stress corrosion c) Conc.cell d) Intergranular e) Galvanic cell. a) Pitting corrosion Pits are holes or cavities that are developed on the metal surface when the protective oxide film breaks. Around such p... 1
- Define Corrosion. Explain mechanism of corrosion by oxygen absorption mechanism Destruction or deterioration or disintegration of a metal by chemical or electrochemical reaction with its environment is called corrosion.... 1
- Give a brief account of proximate analysis of coal . In this analysis moisture, volatile matter, ash and fixed carbon can be determined. Moisture: A known amount of finely powdered air-dried co... 1
- what is Calorie ? it is the amount of heat required to raise the temperature of 1 gram of water through one degree centigrade. 1
- Characteristics of Good Fuel i) Fuel should have high calorific value. ii) Must have moderate ignition temperature. iii) Fuel should have low moisture content. iv) Avail... 1